TREND MICRO INC
POS AM, 2000-05-24
PREPACKAGED SOFTWARE
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<PAGE>

     As filed with the Securities and Exchange Commission on May 24, 2000

                                                      Registration No. 333-10568
================================================================================
________________________________________________________________________________

                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549
                           _________________________
                                POST-EFFECTIVE
                                AMENDMENT NO. 2
                                      TO
                                   FORM F-1

                            REGISTRATION STATEMENT
                                     UNDER
                          THE SECURITIES ACT OF 1933
                           _________________________


                         Trend Micro Kabushiki Kaisha
            (Exact Name of Registrant as Specified in its Charter)

                           _________________________

                           Trend Micro Incorporated
                (Translation of Registrant's Name into English)


                           _________________________

<TABLE>
<S>                                                 <C>                                       <C>
                    Japan                                     7372                                Not Applicable
       (State or Other Jurisdiction of              (Primary Standard Industrial                 (I.R.S. Employer
       Incorporation or Organization)               Classification Code Number)               Identification Number)
</TABLE>

                          Odakyu Southern Tower, 10F
                              2-1, Yoyogi 2-chome
                       Shibuya-ku, Tokyo 151-8583, Japan
                                81-3-5334-3600
  (Address and telephone number of registrant's principal executive offices)
                           _________________________
                              Andrew Kwok-To Lai
                            Chief Operating Officer
                             c/o Trend Micro, Inc.
                       10101 N. DeAnza Blvd., Suite 400
                          Cupertino, California 95014
                                (408) 257-1000
           (Name, address and telephone number of agent for service)
                           _________________________
                                  Copies to :
                            Jonathan Lemberg, Esq.
                              Stan Yukevich, Esq.
                            Morrison & Foerster LLP
                           AIG Building, 11th Floor
                            1-3, Marunouchi 1-chome
                       Chiyoda-ku, Tokyo 100-0005, Japan

     Approximate date of commencement of proposed sale to the public:  As soon
as practicable after this Registration Statement becomes effective.

     If any of the securities being registered on this form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, check the following box. [X]

     If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. [_]

     If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [_]

     If this Form is a post-effective amendment filed pursuant to Rule 462(d)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [_]

     If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. [_]

                         _______________________________

     The Registrant hereby amends this Registration Statement on such date or
dates as may be necessary to delay its effective date until the Registrant shall
file a further amendment which specifically states that this Registration
Statement shall thereafter become effective in accordance with Section 8(a) of
the Securities Act of 1933 or until the Registration Statement shall become
effective on such date as the Commission, acting pursuant to said Section 8(a),
may determine.
________________________________________________________________________________
================================================================================

<PAGE>

PROSPECTUS
- ----------



                            Trend Micro Incorporated

                         810,000 Shares of Common Stock

     This prospectus relates to the offering in the United States of up to
810,000 shares of our common stock under the terms of the U.S. program of our
1999 incentive plan.

     The selling shareholder currently owns 810,000 of our outstanding shares
and is selling all of the shares offered under the U.S. program of the 1999
incentive plan.  We will not receive any of the proceeds from this offering.
The ADSs to be issued upon exchange of the shares at the option of the holder of
such shares are traded on The Nasdaq National Market under the symbol "TMIC."

  The offering price of the shares was set at the market price of our shares in
Japan on July 12, 1999.  Our shares are traded on the over-the-counter market in
Japan.  On July 12, 1999, the last reported sale price of the shares on the
over-the-counter market in Japan was (Yen)6,133, equivalent to $50.19 per share.

   Investing in the shares and ADSs involves risks.  See "Risk Factors"
beginning on page 10.


                                              Per Share             Total
                                              ---------             -----
Initial offering price......................    $50.19          $40,653,900
Proceeds to the selling shareholder.........    $50.19          $40,653,900


     The figures in the per share and "Total" columns reflect conversion of the
per share price in Yen to U.S. Dollars at a rate of  (Yen)122.19 per U.S.
Dollar, the U.S. Federal Reserve Board noon buying rate on July 12, 1999.


     Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved of these securities or determined if this
prospectus is truthful or complete.  Any representation to the contrary is a
criminal offense.


                                  May 24, 2000
<PAGE>

<TABLE>
<CAPTION>
                                                 Table of Contents
                                                                                                                      Page
                                                                                                                      ----
<S>                                                                                                                    <C>
Presentation of Financial and Other Information.....................................................................   2
Cautionary Statement Regarding Forward-Looking Statements...........................................................   3
Prospectus Summary..................................................................................................   4
Risk Factors........................................................................................................  10
Use of Proceeds.....................................................................................................  20
Dividend Policy.....................................................................................................  20
Capitalization......................................................................................................  20
Exchange Rates......................................................................................................  21
Market Price Information............................................................................................  21
Selected Consolidated Financial Information.........................................................................  23
Management's Discussion and Analysis Of Financial Condition and Results of Operations...............................  26
Business............................................................................................................  39
Management..........................................................................................................  57
Principal Shareholders and Selling Shareholder......................................................................  62
Certain Relationships and Related Party Transactions................................................................  63
Shares Eligible for Future Sale.....................................................................................  64
Description of Capital Stock........................................................................................  66
Description of American Depositary Receipts.........................................................................  70
Tax Considerations..................................................................................................  75
Enforceability of Civil Liabilities.................................................................................  83
Japanese Foreign Exchange and Other Regulations.....................................................................  84
Plan of Distribution................................................................................................  86
Legal Matters.......................................................................................................  89
Experts.............................................................................................................  90
Where You Can Find More Information.................................................................................  90
Summary of Significant Differences between Generally Accepted Accounting Principles in Japan and the United States..  91
</TABLE>

                 PRESENTATION OF FINANCIAL AND OTHER INFORMATION

     We publish our consolidated financial statements in Japanese yen.
References in this prospectus to "$" or "dollars" are to U.S. dollars,
references to "(Yen)" are to Japanese yen and references to "NT$" are to New
Taiwan dollars.  For your convenience, this prospectus contains translations of
some Japanese yen amounts into U.S. dollars.  Unless otherwise noted in this
prospectus, for Japanese yen amounts as of December 31, 1998, we have translated
these amounts into U.S. dollars at the rate of $1.00:(Yen)113.08, which was the
noon buying rate in New York City for cable transfers in Japanese yen as
certified by the Federal Reserve Bank of New York on December 31, 1998 and for
Japanese yen amounts as of December 31, 1999, we have translated these amounts
into U.S. dollars at the rate of $1.00: (Yen)102.16, which was the noon buying
rate in New York City for cable transfers in Japanese yen as certified by the
Federal Reserve Bank of New York on December 31, 1999.  You should not treat
these translations as representations that the Japanese yen amounts actually
represent such U.S. dollar amounts or could be converted into U.S. dollars at
the exchange rate indicated.

     Unless otherwise indicated, references to Trend Micro, we, our or us
include Trend Micro Incorporated and its wholly-owned subsidiaries.  All
trademarks appearing in this prospectus are the property of their respective
owners.

                                       2
<PAGE>

           CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS

     The discussion in this prospectus contains forward-looking statements
within the meaning of Section 27A of the U.S. Securities Act of 1933, as
amended, and Section 21E of the U.S. Securities Exchange Act of 1934, as
amended.  These statements involve known and unknown risks, uncertainties and
other factors, which may cause our actual results, levels of activity,
performance, or achievements to differ materially from those implied by the
forward-looking statements.  The forward-looking statements in this prospectus
can be identified, in some instances, by the use of words such as "expects,"
"anticipates," "intends," "believes," and similar language.  We cannot guarantee
future results, levels of activity, performance or achievements.

     Potential risks and uncertainties which may cause our actual results to
differ materially from those implied by the forward-looking statements include,
but are not limited to:

          .  difficulties in addressing new virus and other computer security
             problems;

          .  timing of new product introductions and lack of market acceptance
             for our new products;

          .  the level of continuing demand for, and timing of sales of, our
             existing products;

          .  rapid technological change within the anti-virus software industry;

          .  changes in customer needs for anti-virus software;

          .  existing products and new product introductions by our competitors
             and the pricing of those products;

          .  declining prices for our products and services;

          .  difficulties in adapting our products and services to the internet;

          .  the effect of future acquisitions on our financial condition and
             results of operations;

          .  the effect of adverse economic trends on our principal markets;

          .  the effect of foreign exchange fluctuations on our results of
             operations;

          .  the potential lack of attractive investment targets;

          .  difficulties in successfully executing our investment strategy; and

          .  other risks discussed under "Risk Factors" and elsewhere in this
             prospectus.


                                       3
<PAGE>


                                PROSPECTUS SUMMARY

     You should read the following summary together with the more detailed
information appearing elsewhere in this prospectus regarding Trend Micro, the
shares being sold in the offering and the ADRs that such shares are exchangeable
for, and our financial statements and notes to those statements. appearing
elsewhere in this prospectus.

                                  Our Business

     Trend Micro develops, markets and supports anti-virus software and
management solutions for corporate computer systems and personal computers. Our
products deliver virus protection at each access point within the corporate
network where data files are exchanged. We completed our initial public offering
on the over-the-counter market in Japan in August 1998.

     We market and license our anti-virus software products worldwide but
primarily in Japan, the United States and Taiwan. Japan accounted for
approximately 49% and 43% of our net sales in 1998 and 1999, respectively. The
United States accounted for approximately 19% and 28% of our net sales in 1998
and 1999, respectively. Taiwan accounted for approximately 19% and 11% of our
net sales in 1998 and 1999, respectively.

Market Opportunity

     The anti-virus software market has grown rapidly in recent years. We
believe that the key drivers of growth in the anti-virus software market
currently are:

          .  the proliferation of servers and desktop computers due to use of
             the internet for communication and commerce;

          .  increasing use of e-mail, which is susceptible to computer virus
             infection; and

          .  the increasing number and variety of new computer viruses in
             circulation.

Our Strategy

     Our goal is to develop and deliver the most effective anti-virus and
security software in the market.  We seek to achieve this goal through the
following key strategies:

     .  Use the internet to update, monitor and manage our products.

     .  Expand our market presence in the U.S. and Europe through cooperative
        marketing activities with major hardware manufacturers, software
        developers and internet service companies, and other marketing
        initiatives.

     .  Develop software to meet security threats more quickly and effectively
        than our competitors.

     .  Maintain our leading market position in Japan.

                                       4
<PAGE>



Challenges We Face

     Challenges we face in implementing our strategy include:

     .  Larger software companies may offer anti-virus and other security
        software as a standard feature of other software products.

     .  To counter slowing sales growth in Japan and elsewhere in Asia due in
        part to continuing weakness in the Japanese economy and Asian economies
        generally, we must significantly increase our market share in the U.S.
        and Europe.

     .  Our main competitors have greater financial resources and a larger share
        of the U.S. and European anti-virus software markets than we do.

     .  We must keep up with rapid change in the computer software and internet
        service industries.

                             *         *         *

     Our principal executive offices are at Odakyu Southern Tower, 10th Floor,
2-1 Yoyogi 2-chome, Shibuya-ku, Tokyo 151-8583, Japan, and our telephone number
is 81-3-5334-3600.  You can visit our website at www.antivirus.com.  Information
contained on our website does not constitute part of this prospectus.

                                       5
<PAGE>



                                  The Offering

     Our common stock to be outstanding after the offering as shown  below is
based on shares outstanding as of April 30, 2000.  This share amount excludes
2,293,725 shares issuable upon the exercise of warrants granted under our 1997,
1998 and 1999 incentive plans, of which 1,513,375 shares were issuable upon the
exercise of vested warrants as of April 30, 2000.


Offering......................................  Up to 810,000 shares.

Selling shareholder...........................  STG Incentive Company L.L.C. is
                                                selling all of the shares
                                                offered in the offering.

Initial offering price........................  $50.19 per share.

Common stock to be outstanding after the
 offering.....................................  65,096,142 shares

Listings......................................  The shares are listed on the
                                                Japanese over-the-counter
                                                market.  ADSs (at a ratio of 10
                                                ADSs to 1 share) are traded on
                                                The Nasdaq National Market
                                                under the symbol "TMIC."

Use of proceeds...............................  We will not receive any of the
                                                proceeds from the offering.

     You may purchase the shares offered hereby by exercising options granted to
you under the U.S. program of our 1999 incentive plan.  The options were issued
by STG Incentive Company L.L.C., a Delaware limited liability company organized
by Trueway Company Limited, Gainway Enterprises Limited and Steve Ming-Jang
Chang for purposes of the U.S. program.  For more information on the terms of
the 1999 incentive plan and STG Incentive Company L.L.C., see "Plan of
Distribution" on page 86.

                                       6
<PAGE>

                  Summary Consolidated Financial Information

     The following table summarizes certain financial information for our
business.

     The consolidated income statement information for the fiscal years ended
December 31, 1997, 1998 and 1999 and the consolidated balance sheet information
as of December 31, 1998 and 1999 that are identified as being in accordance with
U.S. GAAP, are derived from and should be read together with our consolidated
financial statements prepared in accordance with U.S. GAAP, which have been
audited by PricewaterhouseCoopers, independent accountants, and are included
elsewhere in this prospectus.

     The consolidated balance sheet statement information as of December 31,
1997 that is identified as being in accordance with U.S. GAAP is derived from
our consolidated balance sheet prepared in accordance with U.S. GAAP, which has
been audited by PricewaterhouseCoopers, independent accountants, and is not
included in this prospectus. The consolidated income statement information for
the fiscal years ended December 31, 1995 and 1996, and the consolidated balance
sheet information as of December 31, 1995 and 1996, are derived from our
unaudited consolidated financial statements prepared in accordance with Japanese
GAAP and are not included in this prospectus.

     The consolidated income statement information for the years ended December
31, 1997, 1998 and 1999, and the consolidated balance sheet information as of
December 31, 1997, 1998 and 1999, that are identified as being in accordance
with Japanese GAAP are derived from our consolidated financial statements
prepared in accordance with Japanese GAAP, which have been audited by
PricewaterhouseCoopers, independent accountants, and are not included in this
prospectus.

     You should read the following information together with "Management's
Discussion and Analysis of Financial Condition and Results of Operations" and
the consolidated financial statements and notes beginning on page F-1 of this
prospectus. Some of the information below and in "Selected Consolidated
Financial Information" is presented in accordance with Japanese GAAP, which
differs in important ways from U.S. GAAP. We describe significant differences
between Japanese GAAP and U.S. GAAP under "Management's Discussion and Analysis
of Financial Condition and Results of Operations.Accounting Differences between
Japanese GAAP and U.S. GAAP" and "Summary of Significant Differences between
Generally Accepted Accounting Principles in Japan and the United States."

     Prior to August 1996, Trend Micro was a Taiwanese company. In August 1996,
Trend Micro was reorganized in a series of transactions by which Trend Micro
became the parent corporation of Trend Micro Incorporated (Taiwan) and each of
the international subsidiaries then owned by Trend Taiwan.

                                       7
<PAGE>

<TABLE>
<CAPTION>
                                                                        Year Ended December 31,
                                       -------------------------------------------------------------------------------------
                                           1995            1996            1997            1998           1999         1999
                                       --------------------------------------------------------------------------------------
<S>                                    <C>            <C>             <C>             <C>             <C>              <C>
                                                (in millions of yen and thousands of dollars, except per share data)
Consolidated Income Statement
 Information:
In accordance with Japanese GAAP
   Net sales                             (Yen)1,781      (Yen)4,318      (Yen)7,943     (Yen)10,217    (Yen)13,741     $134,505
                                       ------------    ------------    ------------    ------------    -----------     --------
 Operating income                               553             927           2,349           2,427          4,254       41,641
                                       ------------    ------------    ------------    ------------    -----------     --------
 Income before income tax                       530             974           2,432           2,379          4,464       43,696
 Income taxes                                  (116)           (346)         (1,118)         (1,325)        (1,997)     (19,548)
                                       ------------    ------------    ------------    ------------    -----------     --------
 Net income                                     414             628           1,314           1,054          2,467       24,148
                                       ------------    ------------    ------------    ------------    -----------     --------
 Net income per share (basic)            (Yen)41.41      (Yen)11.63 (1)  (Yen)24.33 (2)  (Yen)18.50 (3) (Yen)38.82     $   0.38
                                       ============    ============    ============    ============    ===========     ========
 Net income per share (diluted)                ----            ----            ----      (Yen)18.10     (Yen)37.73     $   0.37
                                       ============    ============    ============    ============    ===========     ========
 Cash dividends                           (Yen)5.92 (4)        ----            ----            ----      (Yen)3.33 (5) $   0.03
                                       ============    ============    ============    ============   ============     ========
</TABLE>

<TABLE>
<CAPTION>
                                                                Year Ended December 31,
                                        --------------------------------------------------------------------------------
                                            1995        1996           1997           1998          1999         1999
                                        --------------------------------------------------------------------------------
<S>                                     <C>             <C>         <C>            <C>            <C>           <C>
                                               (in millions of yen and thousands of dollars, except per share data)

In accordance with U.S. GAAP
     Net sales........................                              (Yen)7,398     (Yen)9,746     (Yen)13,633   $133,449
     Cost of sales....................                                     734            560             481      4,714
                                                                    ----------     ----------     -----------   --------
       Gross profit...................                                   6,664          9,186          13,152    128,735
                                                                    ----------     ----------     -----------   --------
     Operating expenses:
      Selling.........................                                   1,316          1,618           2,240     21,922
      Research and development........                                     557            960             994      9,733
      General and administrative......                                   2,755          4,995           5,986     58,592
                                                                    ----------     ----------     -----------   --------
        Total operating expenses......                                   4,628          7,573           9,220     90,247
                                                                    ----------     ----------     -----------   --------
     Operating income.................                                   2,036          1,613           3,932     38,488
                                                                    ----------     ----------     -----------   --------
Other income, net.....................                                      82             85              67        658
                                                                    ----------     ----------     -----------   --------
    Income before income taxes........                                   2,118          1,698           3,999     39,146
                                                                    ----------     ----------     -----------   --------
 Income taxes.........................                                   1,267          1,295           1,849     18,103
                                                                    ----------     ----------     -----------   --------
Income before equity in losses of
     affiliated companies.............                                                                  2,150     21,043
                                                                                                  -----------   --------
  Equity in losses of affiliated
     companies........................                                                                      3         23
                                                                                                  -----------   --------
       Net income.....................                                (Yen)851       (Yen)403      (Yen)2,147   $ 21,020
                                                                    ==========     ==========     -----------   ========
       Net income per share (basic)...                              (Yen)15.77(6)   (Yen)7.08(6)   (Yen)33.79   $   0.33
                                                                    ==========     ==========     ===========   ========
   Net income per share (diluted).....                                     --       (Yen)6.92(6)   (Yen)32.85   $   0.32
                                                                    ==========     ==========     ===========   ========
Weighted average common shares
     outstanding (basic)..............                              54,000,000     56,973,091      63,550,164
Weighted average common shares
     outstanding (diluted)............                                      --     58,241,860      65,376,326
</TABLE>

                                       8
<PAGE>

<TABLE>
<CAPTION>
Consolidated Balance Sheet Information:
<S>                                        <C>           <C>           <C>              <C>             <C>             <C>
In accordance with Japanese GAAP
  Cash and cash equivalents (6)........    (Yen)   --    (Yen)   --    (Yen)1,144       (Yen)9,396      (Yen)15,649     $153,180
  Total assets.........................         1,907         3,262         5,544           17,456           28,857      282,469
  Total liabilities....................           963         1,689         2,657            3,215           10,381      101,615
  Stockholders' equity.................      (Yen)944    (Yen)1,573    (Yen)2,887      (Yen)14,241      (Yen)18,476     $180,854

 In accordance with U.S. GAAP
   Cash and cash equivalents...........                                (Yen)1,144       (Yen)9,396      (Yen)15,649     $153,180
   Total assets........................                                     5,435           17,716           28,781      281,729
   Total liabilities...................                                     3,190            4,143           11,471      112,289
   Shareholders' equity................                                (Yen)2,245      (Yen)13,573      (Yen)17,310     $169,440
</TABLE>

_______________________________

(1)  As adjusted to reflect 54,000,000 shares outstanding as of December 31,
     1996 as permitted under U.S. GAAP. As a result of the reorganization,
     shares outstanding decreased from 10,000,000 shares at December 31, 1995 to
     6,000 shares at December 31, 1996. Net income per share based upon 6,000
     shares outstanding at December 31, 1996 was (Yen)104,664.
(2)  As adjusted to reflect 54,000,000 shares outstanding as of December 31,
     1997 as permitted under U.S. GAAP. Shares outstanding increased from 6,000
     shares on December 31, 1996 to 18,000 shares in a one-into-three stock
     split effected on September 1, 1997. Net income per share based on 18,000
     shares outstanding at December 31, 1997 was (Yen)72,979.
(3)  Shares outstanding increased from 18,000 shares on December 31, 1997 to
     62,506,800 shares on December 31, 1998 due to the following events:
          .    an increase to 1,800,000 shares on January 1, 1998 in connection
               with a lowering of the par value of our shares;
          .    a one-into-ten stock split effected on May 7, 1998;
          .    issuance of 2,500,000 shares on August 18, 1998 in connection
               with our initial public offering in Japan;
          .    issuance of 335,600 shares upon exercise of warrants issued under
               the 1997 and 1998 incentive plans; and
          .    a one-into-three stock split effected on September 30, 1999.
(4)  Dividend amounts in New Taiwan dollars have been translated into Japanese
     yen at the Bank of Tokyo-Mitsubishi TTM rate on September 11, 1995 of
     NT$1.00 : (Yen)3.6127.
(5)  Reflects an extraordinary dividend of (Yen)208.3 million paid in March 1999
     to commemorate the listing of our shares on the Japanese over-the-counter
     market.
(6)  As adjusted to reflect the changes in outstanding shares described in note
     3 as permitted under U.S. GAAP.
(7)  Consolidated data under Japanese GAAP for cash and cash equivalents for the
     years 1995-1996 is not available.

                                       9
<PAGE>

                                 RISK FACTORS

     You should consider carefully the risks described below and the other
information in this prospectus before investing in the shares or the ADSs. The
occurrence of any of the following risks could hurt our business, financial
condition or results of operations. In such case, the trading price of our
shares and the ADSs could decline and you could lose all or part of your
investment.

Major software and hardware vendors may incorporate anti-virus protection in
their product offerings, which could render our products obsolete or
unmarketable

     Major vendors of operating system software, other software such as firewall
or e-mail software or computer hardware may decide to enhance or bundle their
products with other products to include anti-virus functions. These companies
may offer anti-virus protection as a standard feature in their products, at
minimal or no additional cost to customers. This could render our products
obsolete or unmarketable, particularly if anti-virus products offered by these
vendors were comparable to our products. In addition, even if these vendors'
anti-virus products offered fewer functions than our products, or were less
effective in detecting and cleaning virus-infected files, customers could still
choose them over our products due to lower cost.

Because we generate substantially all of our revenue from a single product line,
we are vulnerable to decreased demand for such products

     Unlike software companies with diversified product lines, substantially all
of our net sales come from licensing and selling anti-virus software products.
Although we have begun to offer more comprehensive network and internet security
and management software and services, we expect anti-virus products to continue
to account for the largest portion of our net sales for the foreseeable future.
If the demand for, or the prices of, this software drop as a result of
competition, technological change or other factors such as lower growth or a
contraction in the worldwide anti-virus software market, our business, financial
conditions and results of operations could materially suffer.

Deterioration in our relationship with SOFTBANK could result in a decrease in
sales of our products

     We depend on our relationship with SOFTBANK, which is our largest customer
and has played an instrumental role in the development of our business in Japan.
An adverse change in our relationship with SOFTBANK would result in decreased
sales to SOFTBANK and could disrupt our relationships with distributors of our
products. This could make it difficult for us to market our products in Japan.
Sales to SOFTBANK totaled approximately (Yen)1.4 billion or 19% of our net sales
in 1997, approximately (Yen)2.4 billion or 24% of our net sales in 1998 and
(Yen)2.5 billion ($24.0 million) or 18% of our net sales in 1999. In addition,
SOFTBANK has close relationships with many systems integrators through which we
sell our anti-virus software to corporate end users in Japan.

     At the time of our initial public offering in Japan in August 1998,
SOFTBANK was our largest shareholder. Since that time, SOFTBANK has reduced its
holding of our shares. This process culminated in March 2000, when SOFTBANK sold
all of its remaining shares of our common stock and thus ceased to be a Trend
Micro shareholder. We do not believe that our business relationship with
SOFTBANK will suffer as a result of SOFTBANK's sale of its Trend Micro shares,
but we cannot be sure that it will not.

                                       10
<PAGE>

Because of our dependence on SOFTBANK, the price of our shares and ADSs could
fall as a result of adverse events affecting SOFTBANK, even if the events do not
relate directly to us

     Because of our dependence on SOFTBANK, the price of our shares and ADSs
could fall as a result of adverse events affecting SOFTBANK that do not affect
us directly, such as a deterioration in SOFTBANK's business. Also, public market
analysts and investors might view SOFTBANK's sale of all of its Trend Micro
shares in March 2000 as a withdrawal of SOFTBANK's support for us. As a result,
the price of our shares and the ADSs could also fall.

Our net sales in Japan could decline as a result of our revised corporate
licensing policy in Japan

     Starting in April 1999, we revised our corporate licensing policy in Japan.
Under our revised policy, SOFTBANK may have less incentive to sell our products
because discounts on sales to SOFTBANK have been reduced. To date, the new
licensing policy has not hurt our business relationship with SOFTBANK or with
other distributors, or resulted in a decrease in net sales. However, we cannot
be sure that our revised corporate licensing policy will not hurt our business
in the future. If SOFTBANK's or other distributors' purchases of our products
were to decrease significantly because of the revised policy, our net sales
would likely decline.

Because rapid technological change regularly occurs in the anti-virus software
market, our products may become obsolete

     The anti-virus software market is characterized by:

     .   rapid technological change;
     .   the proliferation of new and changing computer viruses;
     .   frequent product introductions and updates; and
     .   changing customer needs.

     These characteristics of our market create significant risks and
uncertainties for our business success. For example, our competitors might
introduce anti-virus products that are technologically superior to our products.
Additionally, new software operating system, network system or anti-virus
software industry standards could emerge. Emerging trends in these systems and
standards currently include applications distributed over the internet and the
use of a web browser to access client-server systems. Our existing products
might be incompatible with some or all of such standards. Our business,
financial condition and results of operations could materially suffer unless we
are able to respond quickly and effectively to these developments.

Because our competitors are more established than we are in the U.S. and
European markets, we may not be able to increase our market share in such
markets

     We believe that our share of the anti-virus software market in the U.S. and
Europe is small relative to the market shares of our principal competitors,
despite the growth of our sales in these markets in 1999. Because our
competitors are already well-established in these key markets and have greater
financial and other resources and market recognition, we may not be able to
compete effectively for market share. If this happens, we may not be able to
increase sales or our market share in these markets, which could materially hurt
the prospects for growth in our business.

                                       11
<PAGE>

     Some of our major competitors have the following important advantages over
us in the U.S. and European markets:

     .  greater name recognition;
     .  more diversified product lines;
     .  larger customer bases; and
     .  significantly greater financial, technical, marketing and other
        resources.

     As a result, as compared to us, our competitors may be able to:

     .  better withstand downturns in the anti-virus software market and in
        the computer
     .  software market in general;
     .  adapt more quickly to new or emerging technologies or changes in
        customer requirements; and
     .  more effectively and profitably market, sell and support their products.

We may suffer a loss of sales and market share in our core Japanese market if
our competitors achieve success in Japan

     Two of our major competitors, Network Associates and Symantec Corporation,
have entered the Japanese anti-virus software market and are allocating
significant resources to achieving success in this Japanese anti-virus software
market. Although these competitors currently have smaller shares of the Japanese
market than Trend Micro, Network Associates and Symantec each has significantly
greater financial, marketing and other resources as a whole than we do.
Additionally, competition in our core Japanese market and in other Asian markets
could intensify in the future if other competitors emerge. As a result of our
competitors' efforts, we may not be able to maintain our current leading market
position in Japan in the future. Also, in order to respond effectively to
increased competition, we may be required to devote more of our product
development, marketing and other resources to the Japanese market, which could
limit our ability to grow in other markets. A material loss of sales and market
share in Japan as a result of our competitors' success could materially harm our
business, financial condition and results of operations.

Our growth may suffer if we are not successful in establishing a new internet
service business

     One of our key strategies for long-term growth is to establish a line of
business focused on delivering network management and security services over the
internet for a fee. If we do not successfully establish and expand this
business, we may lose sales to our competitors who are able to effectively
establish an internet-based service business model. We do not have significant
experience in this business area, and we have generated only limited revenues
from this business to date.

Because we may acquire companies to grow our business, future acquisitions may
reduce our earnings and result in increased costs in our business operations

     In a rapidly changing industry, we occasionally review acquisition
opportunities. Accordingly, we may seek to expand our business through
acquisitions, including our internet service business. Unlike some of our major
competitors, we have limited experience in acquiring existing businesses. Future
acquisitions could result in numerous risks and uncertainties, including:

                                       12
<PAGE>

     .  Our inability to retain customers, suppliers and other important
        business relationships of an acquired business;
     .  Difficulties in integrating an acquired company into Trend Micro,
        including the acquired company's operations, personnel, products and
        information systems;
     .  Diversion of our management's attention from other business concerns;
        and
     .  Adverse effects on our results of operations from acquisition-related
        charges and amortization of goodwill and purchased technology.

     If we make such an acquisition using stock, our current shareholders'
ownership interests will be diluted. Any of these factors could materially hurt
our business, financial condition and results of operations.

We must adapt to the rapidly changing business environment brought on by the
widespread use of the internet

     We have been seeking to use the internet in many parts of our business,
including in the sale, distribution and support of our products. There are still
many uncertainties regarding many facets of the internet, including reliability,
security, access, tax, government regulation and cost. We also run the risk of
not adapting to the latest changes in the internet, which could harm our
business operations. If growth of the internet does not develop at the rapid
pace we expect, our business, financial condition and operating results could be
adversely affected.

If hackers gain unauthorized access to our systems, we could suffer disruptions
in our business and long-term damage to our reputation

     As an anti-virus company that delivers virus protection products over the
internet, we may be more susceptible to problems caused by hackers than other
software companies. For example, if hackers were able to cause us to transmit
computer viruses or interrupt the delivery of our anti-virus software monitoring
and security services over the internet, we could suffer substantial disruptions
in our business and material damage to our reputation. This could result in a
significant loss of our customers and other important business relationships. We
could also incur costs for public relations efforts following attacks by
hackers. Hacker activities could also force us to incur substantial costs to fix
technical problems or result in hackers gaining access to our proprietary
information.

We must effectively manage our growth

     Our business has grown rapidly. This growth has placed, and any future
growth would continue to place, a significant strain on our limited personnel,
management and other resources. Our ability to manage any future growth in our
business will require us to:

        .  attract, train, retain, motivate and manage new employees
           successfully;
        .  effectively integrate new employees into our operations; and
        .  continue to improve our operational, financial, management and
           information systems and controls.

     If we continue to grow, our management systems currently in place may be
inadequate or we may not be able to effectively manage our growth. In
particular, we may be unable to:

        .  provide effective customer service;
        .  develop and deliver products in a timely manner;

                                       13
<PAGE>

        .  implement effective financial reporting and control systems;
        .  implement a new internet-based service business model; or
        .  exploit new market opportunities and effectively respond to
           competitive pressures.

We sell our products through intermediaries who may not vigorously market our
products, have rights of return or may have difficulty in timely paying for
purchased products

     We market substantially all of our products to end users through
intermediaries, including distributors, resellers and value-added resellers. Our
distributors sell other products that are complementary to, or compete with, our
products. While we encourage our distributors to focus on our products through
market and support programs, these distributors may give greater priority to
products of other suppliers, including competitors.

We rely heavily on our management and technical personnel, who may not remain
with us in the future

     We rely, and will continue to rely, on a number of key technical and
management employees, including our CEO, Steve Ming-Jang Chang. While we require
our employees to sign employment agreements, our employees are generally not
otherwise subject to noncompetition covenants. If any of our key employees
leave, our business, results of operations and financial condition could suffer.

Fluctuations in our interim financial results could cause the market price for
the shares and the ADSs to fall

     We believe that our interim financial results may fluctuate in ways that do
not reflect the long-term trend of our future financial performance. It is
likely that in some future semi-annual or other interim periods, our operating
results may be below the expectations of public market analysts and investors.
In this event, the price of our shares and the ADSs could fall.

     Factors which could cause our interim financial results to fluctuate
include:

     .  Timing of sales of our products and services due to customers' budgetary
        constraints, seasonal buying patterns and our promotional activities;
     .  New product introductions by our competitors;
     .  Significant marketing campaigns, research and development efforts,
        employee hirings, and other current expenditures by Trend Micro to
        drive the growth of our business;
     .  Changes in customer needs for anti-virus software; and
     .  Changes in economic conditions in our major markets.

Because of the influence of our principal shareholders, our other shareholders
may be unable to influence our business

     Our principal shareholders, including our executive officers and directors,
beneficially owned approximately 45.9% of our outstanding shares as of March 31,
2000. These shareholders, if they act together, would be able to significantly
influence all matters requiring approval by our shareholders, including the
election of directors and the approval of mergers or other business combination
transactions. Our principal shareholders may have strategic or other interests
that conflict with the interests of our other shareholders. As a result, the
concentration in our

                                       14
<PAGE>

shareholdings may have the effect of delaying or preventing a change in control
of Trend Micro, which could result in the loss of a significant financial gain
to our shareholders.

     Under the terms of SOFTBANK's prior investment in Trend Micro, in the past
we have held management meetings with SOFTBANK. A SOFTBANK executive is also
currently a member of our board of directors. As a result, although SOFTBANK no
longer owns Trend Micro shares after its sale of our stock in March 2000,
SOFTBANK remains able to influence our management and affairs.

Because Japan is our largest market, weakness in the Japanese economy may hurt
our business performance

     While our sales in the U.S. have increased in recent years, we remain
significantly dependent on the Japanese market. Net sales of our anti-virus
software products in Japan accounted for approximately 50% of our net sales in
1997, approximately 49% in 1998 and approximately 43% in 1999. During 1998 and
1999, the Japanese economy contracted due to a number of factors, including weak
consumer spending and lower capital investment by Japanese companies. We believe
the sluggish Japanese economy has hindered growth in our net sales during the
last three years. We currently anticipate that the rate of growth in our net
sales in Japan will continue to decline, partly due to continued weakness in the
Japanese economy.

Because we make a significant percentage of our net sales in Asia, we are more
vulnerable than our competitors to weaknesses in the economies of Asian
countries

     Since the late summer of 1997, a number of Asian countries have experienced
economic, banking and currency difficulties that have led to economic downturns
in those countries. Among other things, the decline in value of Asian
currencies, together with difficulties in obtaining credit, has significantly
limited the purchasing power of our Asian customers. This has resulted in lower
net sales of our products in 1999 and 1998 than in 1997 in Taiwan, Hong Kong,
Korea, Malaysia and other Asian countries. Net sales of our products in these
countries was approximately (Yen)2.0 billion or approximately 28% of our net
sales in 1997, approximately (Yen)1.9 billion ($17.2 million) or approximately
20% of our net sales in 1998 and approximately (Yen)1.8 billion or approximately
13% of our net sales in 1999. When compared with our main competitors, we
believe we make a greater portion of our total sales in these countries. We
expect that continued economic weakness in Asia will continue to hinder our
growth.

Because we earn revenues denominated in a number of different currencies,
foreign exchange fluctuations could lower our results of operations

     Our reporting currency is the Japanese yen and the functional currency of
each of our subsidiaries is the currency of the country in which the subsidiary
is domiciled. However, a significant portion of our revenues and operating
expenses is denominated in currencies other than the Japanese yen, primarily the
U.S. dollar and the New Taiwan Dollar. As a result, appreciation or depreciation
in the value of other currencies as compared to the Japanese yen could result in
material transaction or translation gains or losses which could reduce our
operating results. These negative effects on Trend Micro from currency
fluctuations could become more significant if we are successful in increasing
our sales in markets outside of Japan. We do not currently engage in currency
hedging activities.

                                       15
<PAGE>

Because our business depends significantly on intellectual property,
infringement of our intellectual property could hurt our business

     Our success depends upon the development of proprietary software
technology. We rely on a combination of contractual rights and patent,
copyright, trademark and trade secret laws to establish and protect proprietary
rights in our software. If we are unable to establish and protect these rights,
our competitors may be able to use our intellectual property to compete against
us. This could limit our growth and hurt our business. At present, our U.S.
subsidiary holds three issued U.S. patents and our Taiwan subsidiary holds four
issued U.S. patents. It is possible that no additional patents will be issued to
us or any of our subsidiaries. In addition, our issued patents may not prevent
other companies from competing with us. We also enter into confidentiality
agreements with our employees and license agreements with our customers, and
limit access to our proprietary information and its distribution. However, we
cannot guarantee that any of these measures will discourage others from
misappropriating our technology or independently developing similar technology.

Our business could suffer if we do not prevail in our lawsuits with Network
Associates

     Our U.S. subsidiary, Trend Micro, Inc., is currently involved in two
lawsuits with Network Associates. In May 1997, Trend U.S. sued Network
Associates in the U.S. Federal District Court for the Northern District of
California, alleging that some of Network Associates' products infringe Trend
U.S.'s patent relating to the technology used in our InterScan VirusWall
product, and seeking injunctive relief and unspecified money damages. Network
Associates has asserted counterclaims against us in this litigation. In April
2000, Network Associates filed suit against Trend U.S. in the U.S. Federal
District Court for the Northern District of Texas, alleging that Trend U.S.'s
anti-virus software packages, including the Trend Virus Control System,
infringes a Network Associates patent. Network Associates' complaint seeks
injunctive relief and unspecified money damages.

     A ruling that is adverse to Trend U.S. in either of these lawsuits could
hurt our business, including by hindering our efforts to further develop the
U.S. market. Also, any ruling that requires Trend U.S. to pay damages or refrain
from taking specified actions, or finds that any of our patents are invalid,
could reduce our operating results or limit our ability to compete. We are
currently in negotiations with Network Associates to settle all outstanding
litigation between the parties. Although we expect to reach agreement with
Network Associates on terms that are acceptable to us, we cannot assure you that
we will be able to do so. We may also become involved in other litigation in the
future. If this happens, we might have to incur significant costs. This could
hurt our business and operating results, and cause the market price of the
shares and ADSs to fall.

Product liability claims asserted against us in the future could hurt our
business

     Our products are designed to protect customers' network systems and
personal computers from damage caused by computer viruses. As a result, if a
customer suffers damage from viruses, the customer could sue us on product
liability or related grounds, claim damages for data loss or make other claims.
Our license agreements typically contain provisions, such as disclaimers of
warranty and limitations of liability, which seek to limit our exposure to these
types of claims. However, in some jurisdictions these provisions may not be
enforceable or statutory, public policy or other grounds. We currently do not
carry product liability insurance covering claims arising in the U.S. While we
have not been sued on product liability grounds to date, a successful product
liability or related claim brought against us could harm our business.

                                       16
<PAGE>

Our stock price is volatile, and investors buying the shares or ADSs may not be
able to resell them at or above their purchase price

     Our common shares are traded on the Japanese over-the-counter market, which
is the principal market for the shares. The Japanese over-the-counter market is
not as large or as active as the Tokyo Stock Exchange or The Nasdaq National
Market and therefore may be less liquid and more volatile. Recently, the U.S.
and Japanese securities markets have experienced significant price and volume
fluctuations. The market prices of securities of high-tech companies, and
internet companies in particular, have been especially volatile. Since trading
in our shares commenced on the Japanese over-the-counter market on August 17,
1998, our stock price has fluctuated between a low of (Yen)1,393 and a high of
(Yen)32,800. Since trading in our ADSs commenced on the Nasdaq National Market
on July 8, 1999, the price of our ADSs has fluctuated between a low of $4.667
and a high of $31.875. The closing price on the Japanese over-the-counter market
for our stock on May 18, 2000 was (Yen)12,800, and the closing price on The
Nasdaq National Market for our ADSs on May 17, 2000 was $13.125 per ADS. The
market price of our shares and ADSs is likely to fluctuate in the future.

We do not expect to pay cash dividends

     We intend to retain any future earnings to finance our business and
operations and any future growth. Therefore, we do not anticipate paying any
cash dividends in the foreseeable future.

Yen-dollar fluctuations could cause the market price of the ADSs to decline,
reduce dividend amounts payable to ADS holders, if declared, and affect other
items as expressed in U.S. dollars

     Fluctuations in the exchange rate between the Japanese yen and the U.S.
dollar will affect the U.S. dollar equivalent of the Japanese yen price of the
shares on the Japanese over-the-counter market and, as a result, are likely to
affect the market price of the ADSs. These fluctuations will also affect our
earnings, the book value of our assets and our shareholders' equity as expressed
in U.S. dollars. If in the future we decide to pay dividends on the shares, we
will declare any cash dividends in Japanese yen. Exchange rate fluctuations will
also affect the dividend amounts payable to ADS holders following conversion
into U.S. dollars of dividends paid in Japanese yen on the shares represented by
the ADSs.

Sales of additional shares to the public may cause the price of the shares and
ADSs to fall

     The sale of a substantial amount of shares in our global offering of shares
in the form of shares and American Depositary Shares in July 1999 increased
significantly the number of shares held by the public. This may cause the price
of the shares and the ADSs to fluctuate more than the price of the shares has in
the past, and may also cause the price of the shares and ADSs to decline. In
addition, if our shareholders sell substantial amounts of shares or ADSs in the
public market, the market price of the shares and the ADSs could fall. Such
sales also might make it more difficult for us to sell equity or equity-related
securities in the future at a time and price that we deem appropriate. At April
30, 2000, we had 65,096,142 shares issued and outstanding, assuming no exercise
of outstanding warrants. All of these shares are freely tradable in our primary
trading market, the Japanese over-the-counter market. Certain of our shares are
also traded in the United States in the form of ADSs in compliance with the
holding period, volume, and manner of sale restrictions under Rule 144 under the
Securities Act of 1933. It is also possible that we may issue additional shares
in connection with our financing activities, acquisition activities or
otherwise. Any shares that we issue will also be freely tradable in the Japanese
over-the-counter market, and,

                                      17

<PAGE>

depending on the circumstances of their issuance, may also be freely tradable in
the U.S. public market.

The rights of small shareholders are limited under the Japanese unit share
system

     Our articles of incorporation provide that 500 shares constitute one
"unit." The Japanese Commercial Code restricts the rights of shares that do not
constitute whole units. Holders of shares constituting less than one unit do not
have the right to vote, to institute derivative actions or to examine our books
and records. Each ADS offered in the offering represents the right to receive
one-tenth of one share. A holder who owns less than 5,000 ADSs will indirectly
own less than a whole unit. Under the deposit agreement governing the rights of
ADS holders, in order to withdraw any shares, an ADS holder must surrender ADRs
evidencing 5,000 ADSs or a multiple of 5,000 ADSs. Each ADR will bear a legend
to that effect. Under the unit share system, holders of less than a unit have
the right to require us to purchase their shares. Holders of ADSs that represent
other than multiples of whole units cannot withdraw the underlying shares
representing less than one unit. They will therefore be unable, as a practical
matter, to

     .  exercise the right to require us to purchase the underlying shares, or

     .  receive cash settlement in lieu of withdrawal.

     As result, as a holder of ADSs, you will not be able to access the Japanese
markets through the withdrawal mechanism to sell shares in lots of less than one
unit. The unit share system does not affect the transferability of ADSs, which
may be transferred in any lot size.

As a holder of ADSs, you will have fewer rights than a shareholder has and you
will have to act through the depositary to exercise those rights

     The rights of shareholders under Japanese law to take actions including
voting their shares, receiving dividends and distributions, bringing derivative
actions, examining the company's accounting books and records and exercising
appraisal rights are available only to holders of record. Because the
depositary, through its custodian agents, is the record holder of the shares
underlying the ADSs, only the depositary can exercise those rights in connection
with the deposited shares. The depositary will make efforts to vote the shares
underlying your ADSs as instructed by you and will pay to you the dividends and
distributions collected from us. However, in your capacity as an ADS holder, you
will not be able to bring a derivative action, examine the accounting books and
records of the company or exercise appraisal rights through the depositary.

Rights of shareholders under Japanese law may be more limited than under the law
of other jurisdictions

     Our articles of incorporation, our board of directors' regulations and the
Japanese Commercial Code govern our corporate affairs. Legal principles relating
to such matters as the validity of corporate procedures, directors' and
officers' fiduciary duties and shareholders' rights may be different from those
that would apply if we were a non-Japanese company. For example, under the
Commercial Code, only holders of 3% or more of the issued and outstanding shares
are entitled to examine our accounting books and records. Shareholders' rights
under Japanese law may not be as extensive as shareholders' rights under the law
of other countries. You may have more difficulty in asserting your rights as a
shareholder than you would as a shareholder of a corporation organized in
another jurisdiction. In addition, Japanese courts may not be willing to

                                       18
<PAGE>

enforce liabilities against us in actions brought in Japan which are based upon
the securities laws of the United States or any U.S. state.



                                       19
<PAGE>

                                USE OF PROCEEDS

     We will not receive any proceeds from this offering.

                                DIVIDEND POLICY

     We currently intend to retain any earnings for reinvestment to develop our
business. In September 1995, we paid a cash dividend of (Yen)36.1 million, or
(Yen)5.92 per share, based on 10,000,000 shares of Trend Micro Incorporated
(Taiwan) outstanding on December 31, 1995. In March 1999, to commemorate the
listing of our shares on the Japanese over-the-counter market, we declared and
paid to our shareholders of record as of December 31, 1998 an extraordinary
dividend of (Yen)208.3 million, or (Yen)3.33 per share.

                                CAPITALIZATION

     The following table shows the capitalization of Trend Micro in accordance
with U.S. GAAP at December 31, 1999. You should read this table together with
the consolidated financial statements and notes beginning on page F-1 and
"Selected Consolidated Financial Information" on page 23. "Common stock issued
and outstanding" below does not include 2,293,725 shares issuable upon the
exercise of outstanding warrants granted under our 1997, 1998 and 1999 incentive
plans, of which 1,513,375 shares were issuable upon the exercise of warrants
vested as of April 30, 2000. We increased the number of our authorized shares
from 72,000,000 to 83,000,000 in March 1999 and from 83,000,000 to 250,000,000
in March 2000.


<TABLE>
<CAPTION>
                                                                                                 December 31, 1999
                                                                                                 -----------------
                                                                                              (in millions of yen and
                                                                                               thousands of dollars)
                                                                                         ----------------------------------
<S>                                                                                      <C>                       <C>
Long-term liabilities                                                                    (Yen) 6,352               $  62,173
                                                                                         -----------               ---------
Shareholders' equity:
  Common stock ((Yen)50 par value); 83,000,000 shares authorized, 64,842,900 shares
  issued and outstanding                                                                        5,415                 53,002
  Additional paid-in capital                                                                    9,199                 90,042
  Legal reserve                                                                                   150                  1,468
  Deferred compensation                                                                          (102)                  (994)
  Retained earnings                                                                             3,082                 30,171
  Net unrealized gain on debt and equity securities                                               216                  2,114
  Cumulative translation adjustments                                                             (633)                (6,196)
  Treasury stock, at cost (1999, 875 shares)                                                      (17)                  (168)
                                                                                         ------------              ---------
     Total shareholders' equity                                                                17,310                169,439
                                                                                         ------------              ---------
         Total capitalization                                                            (Yen) 23,662              $ 231,612
                                                                                         ============              =========
</TABLE>


                                       20
<PAGE>

                                EXCHANGE RATES

     The Japanese yen is convertible into U.S. dollars at freely floating rates,
and there are currently no restrictions on the transfer of Japanese yen between
Japan and the United States. On May 17, 2000, the noon buying rate in New York
City for cable transfers in Japanese yen as certified by the Federal Reserve
Bank of New York was US$1.00 = (Yen)109.53.

     The following table shows, for the last five fiscal years, the average of
the month-end noon buying rates for US$1.00. For 2000, information shown below
is through May 17, 2000.

<TABLE>
<CAPTION>
                                                          Japanese Yen per U.S. Dollar
                                                            Year Ended December 31,
                           ----------------------------------------------------------------------------------------------
                                 1995           1996            1997            1998            1999            2000
                           ----------------------------------------------------------------------------------------------
<S>                          <C>             <C>             <C>             <C>             <C>             <C>
Average.................     (Yen) 94.07     (Yen)109.31     (Yen)121.85     (Yen)130.88     (Yen)112.79     (Yen)107.49
High....................          104.20          115.88          131.08          147.14          124.45          111.11
Low.....................           81.12          103.92          111.42          113.08          101.53          101.70
Period-end..............          103.28          115.77          130.45          113.08          102.16          109.53
</TABLE>

                           MARKET PRICE INFORMATION

Japanese Over-The-Counter Market

     Our shares have been traded since August 18, 1998 on the Japanese over-the-
counter market, which is the principal trading market for the shares. Prior to
August 18, 1998, there was no public market for the shares. The following table
shows, for the periods indicated, the high and low closing per-share sale prices
of the shares as reported by the Japan Securities Dealers Association, taking
into account the one-into-three stock split effected on September 30, 1999.


<TABLE>
<CAPTION>
                                                                             Yen Price Per Share
                                                                      -------------------------------
                                                                         High                 Low
                                                                      -----------         -----------
<S>                                                                   <C>                 <C>
1998  Third quarter (August 18 to September 30, 1998)..........       (Yen) 2,833         (Yen) 1,867
      Fourth quarter...........................................             2,583               1,393

1999  First quarter............................................             5,100               2,367
      Second quarter...........................................             7,333               3,800
      Third quarter............................................            10,833               3,177
      Fourth quarter...........................................            25,800              14,000

2000  First quarter............................................            32,800              16,900
      Second quarter (through May 18, 2000)....................            19,100               9,500
</TABLE>


     On May 18, 2000, the closing sale price of the shares on the Japanese over-
the-counter market was (Yen)12,800 per share.

                                       21
<PAGE>

U.S. Market

     Certain of our shares have been traded on The Nasdaq National Market since
July 8, 1999 in the form of American Depositary Shares under the symbol "TMIC."
The following table shows, for the periods indicated, the high and low closing
per-ADS sale price of the ADSs and the average daily trading volume of the ADSs,
taking into account the one-into-three stock split effected on September 30,
1999.

<TABLE>
<CAPTION>
                                                                            Dollar Price Per ADS
                                                                        ---------------------------
                                                                           High             Low
                                                                        -----------     -----------
<S>                                                                     <C>             <C>
1999  Third quarter (from July 8, 1999)...........................          $13.125         $ 4.667
      Fourth quarter..............................................           24.500          13.500

2000  First quarter...............................................           31.875          16.500
      Second quarter (through May 17, 2000).......................           17.188          10.375
</TABLE>

     On May 17, 2000, the closing sale price of the ADSs on The Nasdaq National
Market was $13.125 per ADS.

Overview of the Japanese Over-The-Counter Market

     On the Japanese over-the-counter market, member securities firms trade
registered stocks primarily through JASDAQ Market Services, Inc., which acts as
a matching and settlement agent for the Japan Securities Dealers Association.
Member securities firms receive bid and offer quotations, trading volumes,
selling prices and other trading information through a computerized system. As
of March 31, 2000, the stock of 872 companies was registered on the Japanese
over-the-counter market. As of March 31, 2000, the Japanese over-the-counter
market had an aggregate market capitalization of approximately (Yen)30.7
trillion.

                                       22
<PAGE>

                  SELECTED CONSOLIDATED FINANCIAL INFORMATION

     You should read the following selected consolidated financial information
together with the financial statements and notes to the statements beginning on
page F-1 of this prospectus, "Management's Discussion and Analysis of Financial
Condition and Results of Operations" and "Summary of Significant Differences
Between Generally Accepted Accounting Principles in Japan and the United States"
included elsewhere in this prospectus.

     The consolidated income statement information for the fiscal years ended
December 31, 1997, 1998 and 1999, and the consolidated balance sheet information
as of December 31, 1998 and 1999, that are identified as being in accordance
with U.S. GAAP are derived from and should be read together with our
consolidated financial statements prepared in accordance with U.S. GAAP, which
have been audited by PricewaterhouseCoopers, independent accountants, and are
included elsewhere in this prospectus.

     The consolidated balance sheet statement information as of December 31,
1997 that is identified as being in accordance with U.S. GAAP is derived from
our consolidated balance sheet prepared in accordance with U.S. GAAP, which has
been audited by PricewaterhouseCoopers, independent accountants, and is not
included in this prospectus. The consolidated income statement information for
the fiscal years ended December 31, 1995 and 1996, and the consolidated balance
sheet information as of December 31, 1995 and 1996, are derived from our
unaudited consolidated financial statements prepared in accordance with Japanese
GAAP and not included in this prospectus.

     The consolidated income statement information for the years ended December
31, 1997, 1998 and 1999, and the consolidated balance sheet information as of
December 31, 1997, 1998 and 1999, that are identified as being in accordance
with Japanese GAAP are derived from our consolidated financial statements
prepared in accordance with Japanese GAAP, which have been audited by
PricewaterhouseCoopers, independent accountants, and are not included in this
prospectus.

     Some of the information below is presented in accordance with Japanese
GAAP, which differs in important ways from U.S. GAAP. For a summary of
significant differences between Japanese GAAP and U.S. GAAP, see "Management's
Discussion and Analysis of Financial Condition and Results of
Operations - Accounting Differences between Japanese GAAP and U.S. GAAP" and
"Summary of Significant Differences between Generally Accepted Accounting
Principles in Japan and the United States." Historical results are not
necessarily indicative of future results of operations.

     Prior to August 1996, Trend Micro was a Taiwanese company. In August 1996,
Trend Micro was reorganized in a series of transactions by which Trend Micro
became the parent corporation of Trend Taiwan and each of the international
subsidiaries then owned by Trend Taiwan.

                                       23
<PAGE>

<TABLE>
<CAPTION>
                                                                        Year Ended December 31,
                                      --------------------------------------------------------------------------------------
                                          1995            1996           1997            1998            1999         1999
                                      --------------------------------------------------------------------------------------
                                               (in millions of yen and thousands of dollars, except per share data)
<S>                                   <C>            <C>             <C>             <C>             <C>            <C>
Consolidated Income Statement
Information:

In accordance with Japanese GAAP
  Net sales........................   (Yen)1,781     (Yen)4,318      (Yen)7,943      (Yen)10,217     (Yen)13,741    $134,505
                                      ----------     ----------      ----------      -----------     -----------    --------
  Operating income.................          553            927           2,349            2,427           4,254      41,641
                                      ----------     ----------      ----------      -----------     -----------    --------
  Income before income tax.........          530            974           2,432            2,379           4,464      43,696
  Income taxes.....................         (116)          (346)         (1,118)          (1,325)         (1,997)    (19,548)
                                      ----------     ----------      ----------      -----------     -----------    --------
  Net income.......................          414            628           1,314            1,054           2,467      24,148
                                      ----------     ----------      ----------      -----------     -----------    --------
  Net income per share (basic).....   (Yen)41.41     (Yen)11.63 (1)  (Yen)24.33 (2)  (Yen)18.50(3)   (Yen) 38.82    $   0.38
                                      ==========     ==========      ==========      ===========     ===========    ========
  Net income per share (diluted)...         ----           ----            ----      (Yen)18.10      (Yen) 37.73    $   0.37
                                      ==========     ==========      ==========      ===========     ===========    ========
  Cash dividends...................   (Yen)5.92 (4)                        ----             ----     (Yen)  3.33 (5)    0.03
                                      ==========     ==========      ==========      ===========     ===========    ========
</TABLE>


<TABLE>
<CAPTION>


                                                                             Year Ended December 31,
                                          ---------------------------------------------------------------------------------------
                                             1995          1996         1997              1998              1999           1999
                                          ---------------------------------------------------------------------------------------
                                                    (in millions of yen and thousands of dollars, except per share data)
<S>                                                                 <C>               <C>              <C>              <C>
In accordance with U.S. GAAP
    Net sales..........................                             (Yen)7,398        (Yen)9,746       (Yen)13,633      $ 133,449
    Cost of sales......................                                    734               560               481          4,714
                                                                    ----------        ----------       -----------      ---------
        Gross profit...................                                  6,664             9,186            13,152        128,735
                                                                    ----------        ----------       -----------      ---------
    Operating expenses:................
        Selling........................                                  1,316             1,618             2,240         21,922
        Research and development.......                                    557               960               994          9,733
        General and administrative.....                                  2,755             4,995             5,986         58,592
                                                                    ----------        ----------       -----------      ---------
           Total operating expenses....                                  4,628             7,573             9,220         90,247
                                                                    ----------        ----------       -----------      ---------
    Operating income...................                                  2,036             1,613             3,932         38,488
                                                                    ----------        ----------       -----------      ---------
    Other income, net..................                                     82                85                67            658
                                                                    ----------        ----------       -----------      ---------
    Income before income taxes.........                                  2,118             1,698             3,999         39,146
                                                                    ----------        ----------       -----------      ---------
    Income taxes.......................                                  1,267             1,295             1,849         18,103
                                                                    ----------        ----------       -----------      ---------
    Income before equity in
     losses of affiliate companies.....                                                      403             2,150         21,043
                                                                                      ==========       ===========      =========
    Equity in losses of
     affiliated companies..............                                                        -                 3             23
                                                                                      ==========       ===========      =========
    Net income.........................                             (Yen)  851        (Yen)  403       (Yen) 2,147      $  21,020
                                                                    ==========        ==========       ===========      =========
    Net income per share (basic).......                             (Yen)15.77 (6)    (Yen) 7.08 (6)   (Yen) 33.79      $    0.33
                                                                    ==========        ==========       ===========      =========
    Net income per share (diluted).....                                     --        (Yen) 6.92       (Yen) 32.85      $    0.32
                                                                    ==========        ==========       ===========      =========
    Weighted average common shares
     outstanding (basic)...............                             54,000,000        56,973,091        63,550,164
    Weighted average common shares
     outstanding (diluted).............                                     --        58,241,860        65,376,326
</TABLE>

                                       24
<PAGE>

<TABLE>
<CAPTION>
                                                                               December 31,
                                               ---------------------------------------------------------------------------------
                                                   1995          1996           1997           1998          1999        1999
                                               ---------------------------------------------------------------------------------
                                                      (in millions of yen and thousands of dollars, except per share data)
Consolidated Balance Sheet Information:
<S>                                             <C>           <C>            <C>           <C>            <C>           <C>
In accordance with Japanese GAAP
  Cash and cash equivalents (6)...........      (Yen)   --    (Yen)    --    (Yen) 1,444   (Yen) 9,396    (Yen)15,649   $153,180
  Total assets............................           1,907          3,262          5,544        17,456         28,857    282,469
  Total liabilities.......................             963          1,689          2,657         3,215         10,381    101,615
  Stockholders' equity....................      (Yen)  944    (Yen) 1,573    (Yen) 2,887   (Yen)14,241    (Yen)18,476   $180,854

In accordance with U.S. GAAP
  Cash and cash equivalents...............                                   (Yen) 1,144   (Yen) 9,396    (Yen)15,649   $153,180
  Total assets............................                                         5,435        17,716         28,781    281,729
  Total liabilities.......................                                         3,190         4,143         11,471    112,289
  Shareholders' equity....................                                   (Yen) 2,245   (Yen)13,573    (Yen)17,310   $169,440
</TABLE>

_______________________________

(1) As adjusted to reflect 54,000,000 shares outstanding as of December 31, 1996
    as permitted under U.S. GAAP. As a result of the reorganization, shares
    outstanding decreased from 10,000,000 shares at December 31, 1995 to 6,000
    shares at December 31, 1996. Net income per share based upon 6,000 shares
    outstanding at December 31, 1996 was (Yen)104,664.
(2) As adjusted to reflect 54,000,000 shares outstanding as of December 31, 1997
    as permitted under U.S. GAAP. Shares outstanding increased from 6,000 shares
    on December 31, 1996 to 18,000 shares in a one-into-three stock split
    effected on September 1, 1997. Net income per share based on 18,000 shares
    outstanding at December 31, 1997 was (Yen)72,979.
(3) Shares outstanding increased from 18,000 shares on December 31, 1997 to
    62,506,800 shares on December 31, 1998 due to the following events:
       .      an increase to 1,800,000 shares on January 1, 1998 in connection
              with a lowering of the par value of our shares,
       .      a one-into-ten stock split effected on May 7, 1998,
       .      issuance of 2,500,000 shares on August 18, 1998 in connection with
              our initial public offering in Japan,
       .      issuance of 335,600 shares upon exercise of warrants issued under
              the 1997 and 1998 incentive plans, and
(4) Dividend amounts in New Taiwan dollars have been translated into Japanese
    yen at the Bank of Tokyo-Mitsubishi TTM rate on September 11, 1995 of
    NT$1.00 : (Yen)3.6127.
(5) Reflects an extraordinary dividend of  (Yen)208.3 million paid in March 1999
    to commemorate the listing of our shares on the Japanese over-the-counter
    market.
(6) As adjusted to reflect the changes in outstanding shares described in note
    3, as permitted under U.S. GAAP.
(7) Consolidated data under Japanese GAAP for cash and cash equivalents for the
    years 1995-1996 is not available.

                                       25
<PAGE>

                     MANAGEMENT'S DISCUSSION AND ANALYSIS
               OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

     You should read the following discussion together with the financial
statements and notes beginning on page F-1 of this prospectus. Additionally, the
following discussion includes forward-looking statements about our business and
future performance. You should read these forward-looking statements together
with the description of the uncertainties and risks associated with these
statements contained under the heading "Cautionary Statement Regarding Forward-
Looking Statements" in this prospectus.

Overview

     Trend Micro develops, markets and supports anti-virus software and
management solutions for corporate computer systems and desktop personal
computers. Our net sales consist primarily of license and license renewal fees,
as well as limited sales of our products to other companies for inclusion in
their products. Site license fees for corporate end users consist of a fee for
the license itself and fees for maintenance and support delivered over the
initial license term. Maintenance and support generally includes virus pattern
updates, product version updates, telephone and online technical support and
free use of our 24-hour service centers. Upon expiration of the initial term,
corporate end users can renew the license annually by paying a fee generally
equal to one-half of the initial license fee in Japan and 20%-50% of the initial
license fee in the U.S. and elsewhere, depending on the country. For retail
purchasers of PC-cillin/Virus Buster, the license fee includes maintenance and
support for the initial one-year term only. In order to receive maintenance and
support services after the initial term, these retail purchasers must pay a
percentage, generally less than one-half, of the original license fee.

     We generally recognize revenues from product licenses when:

     .  the product has been shipped or electronically delivered;

     .  no significant vendor obligations remain; and

     .  collection of the resulting account receivable is probable.

     In general, we record sales revenues attributable to maintenance and
support as deferred revenue and recognize such revenues ratably over the license
term. The percentage of the license fee which is deferred varies depending on
the location of the Trend Micro entity making the sale, as well as the product
sold. The weighted average percentage of license fees which were deferred was
approximately 25% in both 1998 and 1999. In 1999, we began to receive support
fees from systems integrators who subscribe to our eDoctor services. See note 1
to the financial statements.

     Our net sales grew 40% from approximately (Yen)9.7 billion in 1998 to
approximately (Yen)13.6 billion ($133.4 million) in 1999. Our net sales consist
primarily of sales by our operating entities in Japan, the U.S., Taiwan and
Europe. Japan, the U.S., Taiwan and Europe accounted for approximately 43%, 28%,
12% and 13%, respectively, of our net sales in 1999, and approximately 49%, 19%,
18% and 8%, respectively, in 1998.

     Net sales in Japan totaled approximately (Yen)4.8 billion and (Yen)5.8
billion ($57.2 million) in 1998 and 1999, respectively, representing
approximately 49% and 43% of our total net sales in these periods. The decrease
in the percentage of our total net sales represented by our net sales in Japan
was primarily the result of increased U.S. net sales in 1999. In absolute terms,
net sales in

                                       26
<PAGE>

Japan grew approximately 22% from 1998 to 1999, primarily due to increased sales
of our internet-based products to corporate users. Net sales in Japan grew
approximately 30% from 1997 to 1998. Our rate of sales growth in Japan in 1998
and 1999 was significantly lower than in 1997, when our net sales in Japan grew
approximately 84% over 1996. Our lower sales growth in Japan in 1998 and 1999
resulted primarily from the fact that by the end of 1997 we had already
established a large base of corporate end users due to rapid growth in 1997, and
consequently added new corporate customers at a slower rate in 1998 and 1999.
More generally, Japanese corporations' demand for anti-virus solutions has
lagged demand elsewhere, particularly in the U.S.

     Our U.S. net sales grew from approximately (Yen)1.9 billion in 1998 to
approximately (Yen)3.8 billion ($37.5 million) in 1999, an increase of
approximately 105%. Net sales in the U.S. grew approximately 76% from
approximately (Yen)1.1 billion in 1997 to approximately (Yen)1.9 billion in
1998. These annual increases in our U.S. net sales resulted largely from higher
sales of internet-based products as well as our server-based products such as
ServerProtect, primarily as a result of increased internet and server use by new
corporate end users.

     The continuing recession in Asia adversely affected our net sales in Japan
and other parts of Asia during 1998 and 1999. This was especially true in
Taiwan, where net sales decreased from approximately (Yen)1.8 billion in each of
1997 and 1998, to approximately (Yen)1.6 billion ($16.1 million) in 1999.

     Net sales in Europe grew approximately 124% from approximately (Yen)813
million in 1998 to (Yen)1.8 billion ($17.9 million) in 1999. Net sales in Europe
grew approximately 90% from approximately (Yen)428 million in 1997 to (Yen)813
million in 1998. The growth in net sales from 1997 to 1998 resulted largely from
increased sales following the establishment of our European subsidiaries during
1997. We achieved an increased rate of growth in sales from 1998 to 1999 as we
gained greater name recognition in the European market and as a result of
heightened use of anti-virus products by European corporate customers.

     Net sales outside of Japan, the U.S., Taiwan and Europe increased
approximately 17% from approximately (Yen)379 million in 1997 to approximately
(Yen)445 million in 1998, and from 1998 to 1999 increased approximately 9% from
approximately (Yen)445 million to approximately (Yen)483 million ($4.7 million).
These increases were primarily due to higher corporate sales in Europe.

     Until April 1999, we offered three types of licenses to Japanese corporate
customers:

     .  a two-year "executive license" for corporate customers who purchased our
        products through Vaccine Bank, a cooperative marketing program which
        we established with SOFTBANK in 1997;

     .  a one-year site license for Virus Buster; and

     .  a one-year site license for our server package for corporate customers
        who purchased our products through systems integrators.

     Holders of executive licenses have been eligible for license fee discounts
through SOFTBANK. Effective as of April 1, 1999, we adopted a uniform one-year
site license policy for all new Japanese corporate end users, effectively
combining the three licenses described above. We adopted this license policy to
realize a more stable revenue stream based entirely on annual license fees,
rather than a combination of bi-annual and annual license fees. In addition, we
increasingly work directly with systems integrators to provide support and
service to corporate end

                                       27
<PAGE>

users. As a result, we are placing less emphasis on other distribution channels
in Japan. Under our new licensing policy, volume discounts are available for
corporate end users with a large number of personal computers. Discounts on
sales to SOFTBANK have been reduced. As in the past, end users may license our
products directly from us or through SOFTBANK, or other distributors or systems
integrators. Existing executive licenses will remain in effect through their
initial term and are renewable for a two-year renewal term at discounted rates
stated in the original license. After the first renewal, our standard renewal
terms described above will apply. In markets other than Japan and Taiwan, we
generally offer one-year corporate site licenses, with volume discounts for
large corporate customers.

     We made rebate payments to SOFTBANK of approximately (Yen)5.4 million in
1997, approximately (Yen)22.6 million in 1998 and approximately (Yen)97.8
million ($1.0 million) in 1999. The rebate amounts were based on SOFTBANK's
achievement of sales targets agreed upon between SOFTBANK and us. We record
rebate payments as deductions of sales revenue on an accrual basis.

     Our consolidated financial statements are denominated in Japanese yen. All
asset and liability accounts of our foreign subsidiaries are translated into
Japanese yen at the year-end rates of exchange. We translate all income and
expense accounts at rates of exchange that approximate those prevailing at the
time of the transactions and accumulate the resulting adjustments as a separate
component of shareholders' equity. We translate foreign currency-denominated
receivables and payables into Japanese yen at year-end rates of exchange and
recognize or expense the resulting translation gains or losses on a current
basis. Fluctuations in the exchange rate between the Japanese yen and other
currencies, principally the U.S. dollar and the New Taiwan Dollar, will affect
the translation of the financial results of our foreign subsidiaries into
Japanese yen for purposes of our consolidated financial results, and will also
affect the Japanese yen value of any amounts we receive from our subsidiaries.
In the past we have recorded a majority of our expenses, and recognized a
substantial majority of our net sales, in Japanese yen.

     In October 1997, April and June 1998 and July 1999, we granted warrants to
attract and retain key employees. Also, in July 1999, options were granted under
the U.S. program of our 1999 incentive plan. The warrants granted in 1997
generally commenced vesting 30 days after our initial public offering, which we
completed in August 1998. The warrants granted in 1998 generally commenced
vesting on the first anniversary of the grantee's employment. The warrants
granted in 1999 generally commenced vesting six months after the grant date, and
the stock options granted in 1999 will generally commence vesting one year after
the grant date. Using methodology under Accounting Principles Board Opinion No.
25, we have recorded a non-cash compensation expense of approximately (Yen)397.5
million for the year ended December 31, 1998 and approximately (Yen)379.8
million ($3.7 million) for the year ended December 31, 1999 with respect to the
1998 warrants. This expense accounts for the difference between the exercise
prices of the 1998 warrants and the deemed fair market value as of the warrants'
grant date of the shares issuable upon exercise of the warrants. The 1998
warrants are expected to continue to vest through December 31, 2000.
Consequently, we expect to record additional non-cash compensation expense of
approximately (Yen)101.5 million in 2000. Had such non-cash compensation expense
for our 1998 warrants in 1998 and 1999 been determined based on the fair value
of such warrants at the grant dates, as prescribed by Statement of Financial
Accounting Standards No. 123, our pro forma net income would have been
approximately (Yen)147.6 million in 1998 and approximately (Yen)1.7 billion in
1999, and net income per share would have been (Yen)2.59, or (Yen)2.53 on a
fully diluted basis, in 1998 and (Yen)26.73, or (Yen)25.98 on a fully diluted
basis, in 1999. Those figures are significantly different than those determined
under Accounting Principles Board Opinion No. 25. Those differences result
mainly from the current price of the shares and their expected volatility. The
impact of the

                                       28
<PAGE>

pro forma value of the warrants computed under Statement of Financial Accounting
Standards No. 123 has not affected our reported earnings or cash flows. The
impact has been measured for disclosure purposes only and is entirely non-cash
in nature. See note 14 to the financial statements.

     We issued (Yen)6 billion worth of unsecured bonds due July 2002 with
detachable warrants in connection with our 1999 incentive plan in July 1999. The
bonds bear interest at the annual rate of 2.5%. We have invested the proceeds of
the bonds in cash and other short-term investments. Since these investments are
likely to yield less interest income than the interest expense on the bonds, we
will incur a net interest expense with respect to the bonds.

Results of Operations

     The following table sets forth the results of operations for Trend Micro in
absolute terms and as a percentage of net sales. Our historical operating
results are not necessarily indicative of the results for any future period.

<TABLE>
<CAPTION>
                                                                            For the Year Ended December 31
                                                         -------------------------------------------------------------------
                                                              1998           1998           1999           1999       1999
                                                          -------------------------------------------------------------------
                                                                         (in thousands, except percentages)
<S>                                                      <C>                <C>       <C>                 <C>       <C>
Net sales.............................................   (Yen)9,745,664     100.0%    (Yen)13,633,170     100.0%    $133,449
Cost of sales.........................................          559,530       5.7             481,574       3.5        4,714
                                                         --------------     -----     ---------------     -----     --------
     Gross profit.....................................        9,186,134      94.3          13,151,596      96.5      128,735
                                                         --------------     -----     ---------------     -----     --------
Operating expenses:
     Selling..........................................        1,617,759      16.6           2,239,594      16.4       21,922
     Research and development.........................          960,156       9.9             994,340       7.3        9,733
     General and administrative.......................        4,994,937      51.2           5,985,740      43.9       58,592
                                                         --------------     -----     ---------------     -----     --------
            Total operating expenses...................       7,572,852      77.7           9,219,674      67.6       90,247
                                                         --------------     -----     ---------------     -----     --------
Operating income......................................        1,613,282      16.6           3,931,922      28.9       38,488
Other income (expense):
     Interest income..................................           44,620       0.4             148,487       1.1        1,453
     Interest expense.................................          (29,279)     (0.3)            (66,526)     (0.5)        (651)
     Gain on sales of marketable securities...........          146,310       1.5             280,532       2.1        2,746
     Foreign exchange gain (loss), net................          (70,934)     (0.7)           (174,921)     (1.3)      (1,712)
     Other income (expense), net......................           (6,133)     (0.1)           (120,298)     (1.0)      (1,178)
                                                         --------------     -----     ---------------     -----     --------
            Total other income........................           84,584       0.8              67,274       0.4          658
                                                         --------------     -----     ---------------     -----     --------
Income before income taxes............................        1,697,866      17.4           3,999,196      29.3       39,146
                                                         --------------     -----     ---------------     -----     --------
Income taxes:
     Current..........................................        1,641,902      16.8           2,538,455      18.6       24,848
     Deferred.........................................         (347,151)     (3.5)           (688,988)     (5.1)      (6,745)
                                                         --------------     -----     ---------------     -----     --------
                                                              1,294,751      13.3           1,849,467      13.5       18,103
                                                         --------------     -----     ---------------     -----     --------
Income before equity in losses of affiliated
 companies............................................                                      2,149,729      15.8       21,043
                                                         ==============     =====     ===============     =====     ========
Equity in losses of affiliated companies..............                                          2,356         -           23
                                                         ==============     =====     ===============     =====     ========
Net income............................................   (Yen)403,115         4.1%     (Yen)2,147,373      15.8%    $ 21,020
                                                         ==============     =====     ===============     =====     ========
</TABLE>

                                       29
<PAGE>

Comparison of the Years Ended December 31, 1998 and 1999

Net Sales

     Net sales increased 40% from (Yen)9.7 billion in 1998 to (Yen)13.6 billion
($133.4 million) in 1999. The increase was primarily due to increased sales of
internet-based products such as InterScan VirusWall and ScanMail, which grew
from approximately (Yen)2.8 billion or 29% of our net sales in 1998 to
approximately (Yen)6.3 billion ($61.8 million) or 46% of our net sales in 1999.
Net sales of server-based products, primarily ServerProtect, increased from
approximately (Yen)1.0 billion or 10% of our net sales in 1998 to approximately
(Yen)1.5 billion ($14.7 million) or 11% of our net sales in 1999, reflecting
higher corporate demand for internet-based products.

     Net sales of anti-virus software for personal computers, including retail
package sales of PC-cillin/Virus Buster, declined from approximately (Yen)3.7
billion or 38% of net sales in 1998 to approximately (Yen)3.5 billion ($34.3
million) or 26% of net sales in 1999, and no longer represent the largest
portion of our net sales. Within the personal computer product category, retail
package sales of personal computer software decreased from approximately
(Yen)1.6 billion in 1998 to approximately (Yen)0.7 billion ($7.2 million) in
1999, due primarily to decreased sales of our products in our Asian markets. We
released Virus Buster 2000 in September 1999. Site license sales of personal
computer software to corporate end users increased from approximately (Yen)2.1
billion in 1998 to approximately (Yen)2.8 billion ($27.1 million) in 1999.

     Our net sales include a limited amount of sales of our products to other
companies for inclusion in their products. Sales of these products decreased
slightly from approximately (Yen)1.0 billion in 1998 to approximately (Yen)0.7
billion ($6.9 million) in 1999, and as a percentage of net sales decreased from
10% in 1998 to 5% in 1999. The decrease was due primarily to lower sales of our
Trend Chip-Away Virus product.

     Our net sales also include revenues from product upgrade fees, maintenance
fees, royalties and service sales. Sales in these areas increased from
approximately (Yen)0.6 billion in 1998 to approximately (Yen)1.5 billion ($14.7
million) in 1999. The increase was due primarily to increased license renewals
by corporate customers and Virus Buster updates in September 1999. As a
percentage of net sales, sales in these areas increased from approximately 6% in
1998 to approximately 10% in 1999. Royalties totaled approximately (Yen)0.5
billion or 5% of net sales in 1998. No royalties were paid in 1999. The decrease
was due to termination in 1998 of license agreements for a third party to sell
PC-cillin under that party's brand name and for another third party to license
scan engine technology. The remainder of our net sales consists of sales of
other products, which totaled approximately (Yen)0.2 billion ($2.0 million) or
2% of net sales in each of 1998 and 1999.

Cost of Sales

     Cost of sales consists primarily of outbound shipping and handling costs,
costs of manuals and packaging, and amortization of software development costs.
Cost of sales decreased 14% from approximately (Yen)559.5 million in 1998 to
approximately (Yen)481.6 million ($4.7 million) in 1999. The decrease was
primarily due to the decrease in retail package sales for personal computer
software, which has lowered costs by reducing the amount of packaging required
for our net sales.

                                       30
<PAGE>

Operating Expenses

     Operating expenses increased 22% from approximately (Yen)7.6 billion in
1998 to approximately (Yen)9.2 billion ($90.2 million) in 1999.

     Selling

     Selling expenses consist primarily of advertising and selling commissions.
Selling expenses were approximately (Yen)1.6 billion in 1998 and approximately
(Yen)2.2 billion ($21.9 million) in 1999, an increase of 38%. The increase was
primarily a result of increased advertising expenditures in Japan and the U.S.

     Research and development

     Research and development expenses consist primarily of payroll and related
expenses for software engineers who develop and update our anti-virus software
products. Research and development expenses increased 4% from approximately
(Yen)960.2 million in 1998 to approximately (Yen)994.3 million ($9.7 million) in
1999. Research and development personnel increased from 152 at December 31, 1998
to 204 at December 31, 1999. Our research and development expenses in 1999 grew
at a slower rate than our 1999 net sales largely due to our substantially
increased research and development spending in 1998, the benefits of which
carried over into 1999. All costs relating to research and development to
establish the technological feasibility of our software products are expensed as
incurred. In our software development process, technological feasibility is
established upon completion of all significant testing for the original English
language version of the product. We produce local language versions of our anti-
virus software, such as Japanese and Chinese, from the English language version
by adding local language functions. Localization costs, which include direct
labor and overhead costs, are capitalized and amortized over the estimated life
of the product in accordance with Statement of Financial Accounting Standards
No. 86. We believe that we will need to continue to incur costs to update
current products and develop new products to remain competitive. Accordingly, we
expect our research and development expenses to increase moderately in absolute
terms in future periods.

     General and administrative

     General and administrative expenses consist primarily of payroll and
related expenses, customer service, accounting and administration and other
general corporate expenses. General and administrative expenses increased 20%
from approximately (Yen)5.0 billion in 1998 to approximately (Yen)6.0 billion
($58.6 million) in 1999, representing approximately 51% and 44% of net sales for
these years. The increase in general and administrative expenses was primarily
due to higher payroll costs due to new hires and existing employees. Employees
engaged in activities other than research and development increased from 382 at
December 31, 1998 to 494 at December 31, 1999. We expect general and
administrative costs to increase in absolute terms in future periods as we
expand our operations.

Other income (expense)

     We earned interest income of approximately (Yen)44.6 million during 1998
and approximately (Yen)148.5 million ($1.4 million) during 1999. Interest income
in 1999 was primarily earned from the investment of approximately (Yen)10.2
billion ($89.8 million) in net proceeds from our August 1998 Japanese initial
public offering in Japanese money market funds and other cash equivalents, and
from interest received from our investment in bonds issued by SOFTBANK.

                                       31
<PAGE>

     In 1999 we recognized a gain on sales of marketable securities of
approximately (Yen)280.5 million ($2.7 million). The gain primarily resulted
from our sale in shares of common stock of USWeb/CKS, a Nasdaq-listed U.S.
technology company. At December 31, 1999, we held common stock of USWeb/CKS with
an unrealized gain of approximately (Yen)412.4 million ($4.0 million). In March
2000, pursuant to Whittman-Hart's acquisition of USWeb/CKS in a stock-for-stock
merger transaction, we received common shares of MarchFirst, the renamed
Whittman-Hart parent entity following the merger, in exchange for our remaining
holdings of USWeb/CKS common stock.

Income Taxes

     Our statutory tax rate was 51.4% in 1998 and 47.7% in 1999. A change in
Japanese income tax regulations reduced our statutory rate to approximately
42.1% beginning on January 1, 2000. Our effective tax rate was 76.3% in 1998 and
46.2% in 1999. The difference between our statutory and effective tax rates in
1998 and 1999 resulted largely from changes in the valuation allowances relating
to tax-deferred assets held by our U.S. subsidiary, and non-tax deductible
expenses in the form of non-cash warrant compensation expense of approximately
(Yen)397.5 million in 1998 and approximately (Yen)379.8 million ($3.7 million)
in 1999.

Comparison of the Years Ended December 31, 1997 and 1998

     The following table sets forth the results of operations for Trend Micro in
absolute terms and as a percentage of net sales. Our historical operating
results are not necessarily indicative of the results for any future period.

<TABLE>
<CAPTION>
                                                    --------------------------------------------------------------------------
                                                         1997           1997        1998                 1998           1998
                                                    --------------------------------------------------------------------------
                                                                           (in thousands, except percentages)
<S>                                                 <C>                 <C>         <C>                  <C>            <C>
Net sales......................................     (Yen)7,397,979       100.0%     (Yen)9,745,664       100.0%         $86,184
Cost of sales..................................            733,789         9.9             559,530         5.7            4,948
                                                     -------------       -----        ------------       -----          -------
     Gross profit..............................          6,664,190        90.1           9,186,134        94.3           81,236
                                                     -------------       -----        ------------       -----          -------
Operating expenses:
     Selling...................................          1,315,492        17.8           1,617,759        16.6           14,306
     Research and development..................            557,001         7.5             960,156         9.9            8,491
     General and administrative................          2,755,435        37.3           4,994,937        51.2           44,172
                                                     -------------       -----        ------------       -----          -------
         Total operating expenses..............          4,627,928        62.6           7,572,852        77.7           66,969
                                                     -------------       -----        ------------       -----          -------
Operating income                                         2,036,262        27.5           1,613,282        16.6           14,267

Other income (expense):
     Interest income...........................             46,203         0.6              44,620         0.4              394
     Interest expense..........................            (34,984)       (0.5)            (29,279)       (0.3)            (259)
     Gain on sales of marketable securities....                  -           -             146,310         1.5            1,294
     Foreign exchange gain (loss), net.........             66,907         0.9             (70,934)       (0.7)            (627)
     Other income (expense), net...............              3,508         0.1              (6,133)       (0.1)             (54)
                                                     -------------       -----        ------------       -----          -------
         Total other income....................             81,634         1.1              84,584         0.8              748
                                                     -------------       -----        ------------       -----          -------
Income before income taxes.....................          2,117,896        28.6           1,697,866        17.4           15,015
                                                     -------------       -----        ------------       -----          -------
Income taxes:
     Current...................................          1,337,364        18.1           1,641,902        16.8           14,520
     Deferred..................................            (70,919)       (1.0)           (347,151)       (3.5)          (3,070)
                                                     -------------       -----        ------------       -----          -------
                                                         1,266,445        17.1           1,294,751        13.3           11,450
                                                     -------------       -----        ------------       -----          -------
Net income.....................................       (Yen)851,451        11.5%       (Yen)403,115         4.1%         $ 3,565
                                                     =============       =====        ============       =====          =======
</TABLE>

                                       32
<PAGE>

Net Sales

     Net sales increased 32% from approximately (Yen)7.4 billion for the year
ended December 31, 1997 to approximately (Yen)9.7 billion ($86.2 million) for
the year ended December 31, 1998. The increase was primarily due to increased
sales of internet-based products such as InterScan VirusWall and ScanMail, which
grew from approximately (Yen)1.5 billion or 20% of our net sales in 1997 to
approximately (Yen)2.8 billion ($24.8 million) or 29% in 1998. Net sales of
server-based products, primarily ServerProtect, increased in absolute terms from
approximately (Yen)0.8 billion in 1997 to approximately (Yen)1.0 billion ($8.7
million) in 1998 and decreased slightly as a percentage of net sales from 11% in
1997 to 10% in 1998, reflecting higher corporate demand for internet-based
products.

     Net sales of anti-virus software for personal computers, including retail
package sales of PC-cillin/Virus Buster, declined as a percentage of net sales,
but still represented the largest portion of our net sales in 1998, totaling
approximately (Yen)3.7 billion ($32.6 million), or 38% of net sales. Sales of
these products totaled approximately (Yen)3.2 billion or 43% of net sales in
1997. Within the personal computer product category, retail package sales of
personal computer software decreased slightly from approximately (Yen)1.8
billion in 1997 to approximately (Yen)1.6 billion ($13.9 million) in 1998, while
site license sales of personal computer software to corporate end users
increased significantly from approximately (Yen)1.4 billion in 1997 to
approximately (Yen)2.1 billion ($18.7 million) in 1998. The increase was due
primarily to higher demand by corporate end users for our product suites which
typically include our personal computer software products.

     Net sales of our products to other companies for inclusion in their
products increased in absolute terms from approximately (Yen)0.5 billion in 1997
to approximately (Yen)1.0 billion ($8.6 million) in 1998, and as a percentage of
net sales from 7% in 1997 to 10% in 1998. This increase was primarily due to
significant growth in net sales of our Trend ChipAway Virus product, which
increased from approximately (Yen)31.1 million in 1997 to approximately
(Yen)479.9 million ($4.2 million) in 1998.

     Service sales increased in absolute terms from approximately (Yen)0.5
billion in 1997 to approximately (Yen)0.6 billion ($5.2 million) in 1998, but
decreased slightly in percentage terms from 7% of net sales in 1997 to 6% in
1998. Royalties totaled approximately (Yen)0.5 billion or 7% of net sales in
1997, and approximately (Yen)0.5 billion ($4.1 million) or 5% in 1998. The
decrease in percentage terms was due to termination in 1998 of license
agreements for a third party to sell PC-cillin under that party's brand name and
for a third party to license scan engine technology. Net sales of other products
decreased from approximately (Yen)0.4 billion or 5% of net sales in 1997 to
approximately (Yen)0.2 billion ($1.8 million) or 2% in 1998. The decrease was
primarily due to a suspension of sales of some products on a customized combined
basis.

Cost of Sales

     Cost of sales decreased 24% from approximately (Yen)733.8 million for the
year ended December 31, 1997 to approximately (Yen)559.5 million ($4.9 million)
for the year ended December 31, 1998. The decrease was primarily attributable to
cost savings from

     .  our decision in 1998 to distribute our products only on CD-ROMs, and

     .  our delivery of computer virus signature updates via the internet.

                                       33
<PAGE>

Operating Expenses

     Operating expenses increased 64% from approximately (Yen)4.6 billion for
the year ended December 31, 1997 to approximately (Yen)7.6 billion ($67.0
million) for the year ended December 31, 1998.

     Selling

     Selling expenses were approximately (Yen)1.3 billion for the year ended
December 31, 1997 and approximately (Yen)1.6 billion ($14.3 million) for the
year ended December 31, 1998, an increase of 23%. The increase was primarily a
result of increased advertising expenditures in Japan and the U.S.

     Research and development

     Research and development expenses increased 72% from approximately
(Yen)557.0 million for the year ended December 31, 1997 to approximately
(Yen)960.2 million ($8.5 million) for the year ended December 31, 1998. The
increase was primarily attributable to hiring of additional software engineers
to support product development and quality assurance. Research and development
personnel increased from 116 at December 31, 1997 to 152 at December 31, 1998.

     General and administrative

     General and administrative expenses increased 81% from approximately
(Yen)2.8 billion for the year ended December 31, 1997 to approximately (Yen)5.0
billion ($44.2 million) for the year ended December 31, 1998, representing
approximately 37% and 51% of net sales for these years. The increase was
primarily due to higher payroll costs due to new hires and bonuses to existing
employees, as well as non-cash compensation expense of approximately (Yen)397.5
million ($3.5 million) relating to our employee stock incentive programs and
increased lease expenses. Employees engaged in activities other than research
and development increased from 239 at December 31, 1997 to 382 at December 31,
1998.

Other income (expense)

     We earned interest income of approximately (Yen)46.2 million during 1997
and approximately (Yen)44.6 million ($0.4 million) during 1998. Interest income
in 1997 was primarily earned from investments in time deposits in Taiwan.
Interest income in 1998 was primarily earned from the investment of
approximately (Yen)10.2 billion ($89.8 million) in net proceeds from our August
1998 Japanese initial public offering in Japanese money market funds and other
cash equivalents. Interest income decreased slightly in 1998, despite an
increase in cash and cash equivalents, due to a change from time deposits in
Taiwan, which generally earn a higher rate of interest, to Japanese money market
funds and other cash equivalents.

     For the year ended December 31, 1998, we recognized a gain on sales of
marketable securities of approximately (Yen)146.3 million ($1.3 million),
primarily in connection with our sale of common stock of USWeb/CKS. As of
December 31, 1999, we continued to hold USWeb/CKS common stock with an
unrealized gain of approximately (Yen)412.4 million ($4.0 million).

Income Taxes

     Our statutory tax rate for each of the years ended December 31, 1997 and
1998 was 51.4%. A change in Japanese income tax regulations reduced this rate to
approximately 47.7% beginning

                                       34
<PAGE>

on January 1, 1999. Our effective tax rate was 59.8% for 1997 and 76.3% for
1998. The increase in the effective rate for 1998 was primarily due to increased
taxes as a result of an increase in non-tax deductible expenses in the form of
non-cash warrant compensation expense of approximately (Yen)397.5 million ($3.5
million). The increase was also attributable to an approximately (Yen)174.3
million ($1.5 million) net increase in the valuation allowance for tax-deferred
assets held by our U.S. subsidiary.

Accounting Differences between Japanese GAAP and U.S. GAAP

     We prepare financial statements in accordance with both Japanese GAAP and
U.S. GAAP. In this prospectus we include five years of selected financial
information in accordance with Japanese GAAP, and two years of consolidated
financial statements, prepared in accordance with U.S. GAAP. The principal
differences between Japanese GAAP and U.S. GAAP which affect our net sales and
net income are:

     .  Revenue Recognition: A portion of our net sales from product licenses is
        attributable to post-contract support, such as product updates, virus
        pattern updates and customer support. Under Japanese GAAP, the portion
        of net sales attributable to these services is recognized as income at
        the beginning of the license term. Under U.S. GAAP, these service
        revenues are deferred and recognized ratably over the license term.

     .  Warrant Compensation Expense: Under Japanese GAAP, the carrying value of
        the 1998 warrants is recognized as compensation expense when the
        warrants are distributed to employees. This carrying value is equal to
        (Yen)2.85 per warrant, which was the amount we paid to repurchase the
        warrants from SOFTBANK. Under U.S. GAAP, the non-cash compensation
        charge associated with the 1998 warrants which we have recorded in the
        amount of (Yen)397.5 million in 1998 and (Yen)379.8 million ($3.7
        million) in 1999, and will record in the amount of (Yen)101.5 million in
        2000, is accrued as an expense. This expense accounts for the difference
        between the exercise price and the deemed fair market value of the
        shares underlying the 1998 warrants as of the grant date of the
        warrants.

     .  Bonuses to Directors and Employees of Certain Non-U.S. Subsidiaries: We
        accrued (Yen)191 million ($1.7 million) in bonuses to directors and
        employees of some of our non-U.S. subsidiaries in 1998. Under Japanese
        GAAP, these bonuses are accounted for as an appropriation of retained
        earnings when approved by our stockholders. Under U.S. GAAP, these
        bonuses are generally accrued as expense.

Liquidity and Capital Resources

     Prior to our initial public offering, we financed our operations primarily
through the private placement of common stock, bank lines of credit and funds
generated from operations. In August 1998, we completed our initial public
offering in Japan, in which we issued 2.5 million shares at a price of
(Yen)1,433 per share. Proceeds from the initial public offering were
approximately (Yen)10.2 billion ($89.8 million), net of offering costs.

     At December 31, 1999, we had cash and cash equivalents and marketable
securities of approximately (Yen)16.2 billion ($159.3 million), up from
approximately (Yen)11.1 billion at December 31, 1998. The increase was primarily
due to operating activities and proceeds from our issuance of bonds.

                                       35
<PAGE>

     Net cash used in operating activities was approximately (Yen)610.5 million
in 1998 compared to net cash provided by operating activities of approximately
(Yen)1.5 billion ($14.5 million) in 1999. Cash used in operating activities in
1998 was primarily the result of lower net income, an increase in accounts
receivable relating to net sales in the fourth quarter of 1998 and a decrease in
accrued income and other taxes related to payment of estimated Japanese
corporate income tax. This decrease was partially offset by amortization of
deferred compensation expense relating to the warrants issued in 1997 and 1998
and deferred revenue associated with increased net sales. The decrease was also
offset by an increase in other current liabilities related to withholding taxes
imposed upon dividends paid by our Taiwan subsidiary and upon inter-company
payments in connection with relocation of our corporate headquarters to Japan.
Cash provided by operating activities in 1999 was primarily the result of higher
net income, an increase in deferred revenue associated with increased net sales
and amortization of deferred compensation expense relating to the warrants
issued in 1997 and 1998. These increase were primarily offset by an increase of
accounts receivable relating to increased net sales.

     Net cash used in investing activities was approximately (Yen)1.5 billion in
1998 and approximately (Yen)2.7 billion ($26.0 million) in 1999. The increase
from 1998 to 1999 was primarily due to a (Yen)4.0 billion ($39.8 million)
increase in payments for purchases of marketable securities and a (Yen)1.0
billion ($9.4 million) increase in payments for other investments. This increase
was partially offset by proceeds from sales of marketable securities of (Yen)2.4
billion ($23.4 million) and proceeds from maturates of marketable securities for
(Yen)1.1 billion ($10.8 million).

     Net cash provided by financing activities was approximately (Yen)10.4
billion in 1998 and approximately (Yen)7.6 million ($74.2 million) in 1999. Net
cash provided by financing activities in 1998 consisted primarily of cash
received from the issuance of shares in our initial public offering. Net cash
provided by financing activities in 1999 consisted primarily of proceeds from
our issuance of bonds in connection with our 1999 warrants.

     In 1998, we entered into three overdraft agreements with Japanese
commercial banks, under which we are able to obtain short-term financing at
prevailing interest rates for periods not in excess of one year. The aggregate
amount available under these overdraft agreements is (Yen)800 million ($7.8
million). Each of the overdraft agreements has an initial one-year term and is
automatically renewed for additional one-year terms unless otherwise notified by
either party. At December 31, 1999, no amounts were outstanding under these
overdraft agreements.

     During the year ended December 31, 1998, our Taiwan subsidiary entered into
three lines of credit. Under these lines of credit, an aggregate of (Yen)1.3
billion ($11.1 million) was available. We cancelled these lines of credit during
1999, and no amounts were outstanding on December 31, 1999.

     In July 1999, we issued (Yen)6 billion worth of unsecured bonds in
connection with our 1999 incentive plan. We used the proceeds of the bond
issuance for working capital and general corporate purposes.

     Our capital requirements depend on numerous factors, including

     .    market acceptance of our products,

     .    the resources we devote to developing, marketing, selling and
          supporting our products, and

                                       36
<PAGE>

     .    the extent to which we are able to establish relationships with
          strategic partners in the U.S., Europe and elsewhere.

We plan to devote additional capital resources to hire additional engineers and
other employees and expand our product development, support, and sales and
marketing organizations, to expand marketing programs, establish additional
facilities worldwide and for other general corporate activities. Additionally,
in the future we may make acquisitions and strategic investments in order to
grow our business. We believe that our current cash balance, cash flow from
operations and existing credit facilities will satisfy our working capital and
capital expenditure requirements for the next 12 months. However, we cannot be
sure that we will not require additional funding during the next twelve months
or in the future. If we do need additional funding during the next 12 months or
in the future, such funding may not be available on commercially reasonable
terms, if at all. Even if no such additional funds are required, we may seek
additional equity or debt financing.

Market Risk Disclosure

     As discussed in Note 18 to the consolidated financial statements, we have a
policy not to utilize any derivative financial instruments with off-balance
sheet risk. The financial instruments other than derivatives as of December 31,
1999 were cash and cash equivalents including money market funds, marketable
debt and equity securities, accounts receivable and payable and short-term
borrowings. Among these financial instruments, we do not have significant market
sensitive instruments with significant exposure to market risk, except for the
following:

     .    An investment in USWeb/CKS, which was formerly listed on The Nasdaq
          National Market. This investment had a fair market value of $4.6
          million as at December 31, 1999. During the course of the year ended
          December 31, 1999, the high, low and month-end average trading prices
          for the investment were $51.69, $17.63 and $31.23. The potential
          change in the fair market value of the investment, assuming a 10%
          change in prices, would be a gain or loss of approximately $460,000.
          USWeb/CKS has merged with Whittman-Hart in March 2000. The shares of
          marchFIRST, the renamed Whittman-Hart parent entity following the
          merger, now trade on The Nasdaq National Market under the symbol MRCH.

Year 2000 Compliance

     Many currently installed computer systems and software products are coded
to accept only two digit entries in the date code field. As a result, the Year
2000 problem is that software that records only the last two digits of the
calendar year may not be able to distinguish whether "00" means 1900 or 2000.
This software will need to be upgraded to accept four digit entries to
distinguish between 21st century and 20th century dates and avoid software
failures or erroneous data results.

     We have evaluated all of the internally-developed and third-party software
and hardware technology which we use for Year 2000 compliance. We use multiple
software systems in our operations. These systems include several financial,
sales and customer support software programs which have been developed by other
companies and which are material to our business. Based on our evaluation, we
believe that these programs are Year 2000 compliant, and, as of April 30, 2000,
we have not experienced any material Year 2000-related problems. The costs which
we have incurred in the course of our Year 2000 evaluation process have not been
material.

                                       37
<PAGE>

     Although we have not experienced any material Year 2000 problems as of
April 30, 2000, there can be no assurance that such problems will not occur in
the future.

                                       38
<PAGE>

                                   BUSINESS

     We develop, market and support anti-virus software and management solutions
for corporate computing systems and personal computers. Our products deliver
virus protection at each access point within the corporate network where data
files are exchanged.

     Our products have recently won the following awards:

     Publication         Award

     PC Professionnell   In February 2000, German magazine PC Professionnell
                         awarded the Editor's Choice distinction to
                         ServerProtect, OfficeScan Corporate Edition and Trend
                         Virus Control System.

     Windows NT          ServerProtect won Windows NT Magazine's Editor's Choice
     Magazine            Award in its December 1999 issue.

     InfoWorld           October 1998 "Test Center Hot Pick" award for Trend
                         Virus Control System, ServerProtect and OfficeScan
                         Corporate Edition package. For products or solutions
                         deemed to offer stand-out technology, among other
                         criteria.

     InfoWorld           In February 1999 InfoWorld picked the same software
                         package as the anti-virus "Solution of the Year" for
                         1998.

     PC Magazine         In April 1999 a package of Trend Virus Control System,
                         ServerProtect, ScanMail and OfficeScan Corporate
                         Edition earned a "NeaTSuite/Editor's Choice" award
                         based upon performance tests comparing anti-virus
                         solutions. PC Magazine is published by Ziff-Davis Inc.,
                         a subsidiary of SOFTBANK.

     Network Magazine    In April 1999 Network Magazine picked Trend Virus
                         Control System as the anti-virus "Product of the Year"
                         for 1999.

     Our products operate across a range of computer operating system platforms,
including Windows NT, Windows 2000, Windows 98, NetWare, Sun Solaris and several
versions of UNIX. Corporate and government end users of our anti-virus software
and management tools include Boeing, Bank of America, Hewlett-Packard, Chase
Manhattan Bank, Lucent Technologies, GTE, Coca-Cola, MCI WorldCom, ConAgra,
Microsoft, Siemens, Bayer, Deutsche Bank, Nestle, Nissan, the European
Parliament and the European Commission.

     Trend Micro began commercial operations in May 1989, shortly after computer
viruses were first detected, and we completed our initial public offering on the
Japanese over-the-counter market in August 1998. We listed American Depositary
Shares on The Nasdaq National Market in July 1999 in connection with a global
offering of 12,750,000 shares in the form of shares and ADRs.

                                       39
<PAGE>

Industry Background

     The Computer Virus Problem

     Computer viruses are software programs which infect computer systems by
secretly attaching themselves to other software, self-replicating and spreading
as data from diskettes is downloaded into a personal computer's memory. They
also spread as e-mail and application software files are transmitted among
multiple users within a computer network or through the internet. Viruses cause
varying degrees of damage, including displaying disruptive messages on a user's
screen, altering or destroying system files, and reformatting a computer's hard
drive. In corporate networks, viruses can cause network servers and client
computers to stop working. This can result in significant productivity losses,
damage to data files and system reconfiguration costs.

     The Evolution of Computer Viruses

     Computer viruses were first identified in 1986. Until 1995, the most
prevalent type of viruses were "boot sector" viruses, which infect the portion
of a floppy disk that was used to start a personal computer and load the
operating system. These viruses spread to a user's hard disk when the computer
accesses the disk to load system files into memory. "Polymorphic" viruses, which
use complex encryption and change characteristics each time they copy themselves
into a new host program, also developed during this period.

     By the mid-1990s, computer networks had become a critical tool for
information sharing within companies. Viruses followed this new communication
channel, and the primary infection target shifted from the personal computer to
the network server. With enhanced productivity from computer use came the risk
of more widespread damage: in a networked environment, a virus in a single
desktop computer can easily be transmitted through the server to other clients,
and infect the entire network.

     A second-generation class of viruses called "macro viruses" followed the
development of the enterprise network. Like other viruses, macro viruses can
replicate only by attaching to other software programs. Macro viruses differ
from other viruses, however, in that they attach to macro-enabled data files
such as Word and Excel. Macro viruses are relatively easy to create because they
can be written in Basic or other relatively simple programming languages and, as
a result, comprise most of the growth in new viruses. The International Computer
Security Association published a virus prevalence survey in 1999 which stated
that macro viruses accounted for approximately two-thirds of all virus
infections among 300 North American companies surveyed. Like many of our
competitors, we are a member of the Association and in the past have been a
corporate sponsor of the Association's annual survey. We also participate in
anti-virus industry consortia organized by the Association. The Association has
provided certification testing of OfficeScan, ServerProtect, InterScan and other
of our products for us in 1999 for a fee of $22,000.

     Most recently, the advent of the internet as a medium for communication and
commerce has increased the likelihood of infection by a third generation of
viruses carried by applets. Applets are small programs written in ActiveX and
Java. Programmers use ActiveX and Java applets in web pages to enable animation
and interactivity. Accessing a web page containing ActiveX or Java applets
automatically triggers the download and execution of these programs by the
desktop computer. Neither ActiveX nor Java requires a separate program to access
other computers on the internet because they can use the internet as a host. As
a result, malicious code in

                                       40
<PAGE>

these languages can easily replicate and infect computer systems and files. We
believe that most companies do not yet have security systems to detect and
eliminate ActiveX and Java viruses.

     Virus Detection Techniques

     The traditional method of virus detection has been pattern-matching
scanning, which involves gathering suspicious code samples, conducting code
analysis, creating new virus signature files and distributing such files to
customers as updates to existing anti-virus software. This process can be time-
consuming and is generally recognized as ineffective against macro viruses which
can replicate and spread quickly through e-mail and the internet. To block macro
viruses more effectively, anti-virus software developers have created rule-based
scanning, which runs suspect code in an emulated computing environment to
confirm whether it is a virus.

Development of the Anti-Virus Software Market

     The anti-virus software market has grown significantly in the past few
years and is expected to continue to grow in the future. According to Dataquest,
an independent research organization, worldwide anti-virus revenues have grown
from approximately $375 million in 1996 to approximately $771 million in 1998,
and are expected to grow to approximately $1.16 billion in 2002. International
Data Corporation, another independent research organization, estimates that
worldwide anti-virus revenues have grown from approximately $686 million in 1997
to approximately $1.1 billion in 1998, and are expected to grow to approximately
$2.9 billion in 2002.

     Until recently, sales of anti-virus software products consisted primarily
of sales of desktop programs. As viruses followed the shift by companies from
stand-alone desktop personal computers to client-server networks, anti-virus
software developers introduced new products to operate at the network server
level. Screening data at the server has the benefit of preventing viruses from
spreading to multiple personal computers through the exchange of files and e-
mail messages. In addition, the growth of the internet has resulted in increased
risk of virus infection for networks. In response, anti-virus software companies
have begun to develop solutions to protect against viruses entering the
corporate network from the internet.

     While many businesses, particularly in the United States and Europe, have
responded to the computer virus threat by adopting network security policies and
adding anti-virus software to their networks, viruses continue to infect
enterprise networks worldwide. According to data compiled by the Information-
Technology Promotion Agency, a quasi-governmental organization affiliated with
the Japanese Ministry of International Trade and Industry, incidents of virus
infections in Japan have increased significantly, from 755 in 1996 to 3,645 in
1999. We cooperate with the Information-Technology Promotion Agency by providing
information regarding new types of viruses, product demonstrations and virus
protection seminars. In 1998, the Information-Technology Promotion Agency paid
us approximately (Yen)9.0 million ($75,000) for virus analysis services. We
believe that, for publicity and other reasons, companies in Japan tend not to
report virus infections as readily as companies elsewhere and that the actual
number of incidents is even higher. The International Computer Security
Association's 1999 survey indicates that the 300 surveyed North American
companies experienced about 13 virus encounters per 1,000 machines per month
during the period from January 1996 to February 1999.

     Our products have evolved with the development of the anti-virus software
market as a whole. Until recently, sales of anti-virus software products
consisted primarily of sales of our desktop programs, such as PC-cillin/Virus
Buster, which we introduced in Japan in 1991. To meet

                                       41
<PAGE>

increased demand for network-based products as companies shifted from stand-
alone desktop personal computers to client-server enterprise networks in the
early 1990s, we introduced LANprotect, our first server application, in 1993. To
address the increased risk of virus infection for enterprise networks resulting
from widespread use of the internet, we introduced InterScan VirusWall in 1997
to provide real-time scanning at the internet gateway. The internet gateway is
the network server where data enters the network from the internet. In 1998 we
introduced Trend Virus Control System to enable network-wide anti-virus software
monitoring, updating and management from a central management console.

Challenges to Providing Comprehensive Anti-virus Protection

     The evolution of computer viruses with the shift from stand-alone personal
computers to client-server enterprise networks and, most recently, the emergence
of the internet has created a number of challenges to businesses seeking
protection against viruses:

     .    Keeping Pace with the Rapid Evolution and Proliferation of New
          Viruses. As computer technology has grown more sophisticated, the
          number of viruses, as well as the type or "species" of viruses, have
          grown rapidly. We estimate that the number of known viruses has
          increased from approximately 100 in 1990 to more than 25,000 in 1999.
          We believe that new viruses are appearing at the rate of 14 or 15 per
          day. Moreover, there are now at least five "species" of viruses, each
          exploiting a different aspect of computer technology: boot sector
          viruses, file viruses, macro viruses, script viruses and malicious
          ActiveX and Java programs. Our virus prevalence estimates are based on
          our experience in developing and maintaining our products. We keep a
          record of each virus which our software has detected and removed, and
          maintain computer files of virus samples. The above estimates are
          based on the number and types of viruses that we have detected and
          removed on an annual basis from 1990 to 1999.

     .    Protecting Against Infections at Multiple Levels. New technologies
          have not only spurred growth in the number and types of viruses, they
          have also created multiple entry points for viruses. Transmission of
          viruses is no longer confined to downloading a file off a floppy disk
          onto a desktop personal computer. Viruses can now be transmitted at
          the server level, through files transmitted from a local area network
          server to client, and the internet gateway level, through e-mail or
          Java applets embedded in web pages. Traditional approaches which focus
          on protecting only at the desktop level have become inadequate in
          today's networked environment.

     .    Difficulty in Providing Enterprise-Wide Protection Against Rapidly
          Evolving Virus Technology. The pervasiveness of computing technology
          in today's business enterprises creates enormous challenges for
          deploying and updating comprehensive anti-virus protection. No matter
          how advanced the basic underlying anti-virus program, protection for a
          computer system consisting of multiple servers and hundreds or even
          thousands of client computers is inadequate unless there is an
          efficient means to administer it. Traditional approaches which rely on
          monitoring by information technology staff are costly and inefficient.

Strategy

     We seek to develop and deliver the most effective anti-virus and security
software in the market. Our strategy to attain this goal includes:

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     Implement Internet Service Business Model. We believe the internet presents
an important opportunity to address customers' network security needs by
offering products and services delivered through the internet. Our Trend Virus
Control System software and eDoctor service already use the internet to update,
monitor and manage anti-virus software throughout the enterprise network. We
plan to offer services for a fee over the internet indirectly through systems
integrators and internet and telecom service providers. We are also expanding
our business model to include additional security-oriented solutions such as our
InterScan eManager e-mail management product and our InterScan WebManager
internet access management product. We will seek to offer additional internet-
related applications which can manage network capacity, control access to
designated websites and provide security for electronic commerce transactions.
We may also in the future seek to expand our business by acquiring companies
which offer competitive services delivered over the internet.

     Expand International Market Presence through Strategic Partnerships. We are
focusing on increasing our share of the international anti-virus and network
security market, particularly in the U.S. and Europe. One of our strategies in
this area is to form alliances with major computer hardware manufacturers,
software developers and telecom providers. We believe these partnerships create
new sales channels for our products and strengthen the Trend Micro brand name in
key markets. To this end, we have entered into agreements with Check Point,
Compaq, Hewlett-Packard, IBM/Lotus, Lucent Technologies, Microsoft, Oracle and
other companies. These agreements provide for cooperative marketing activities
such as the vendors' referral of customers to our products and reference to our
products in their product literature and websites. Our agreements with these
vendors also typically provide for co-development and licensing arrangements so
that our products and the vendors' products operate smoothly when used together.
We plan to seek relationships with other providers of complementary products
such as server vendors and network management software developers.

     Enhance Trend Micro's Technology. Our multinational team of 251 research
and development anti-virus engineers has enabled us to focus on providing
innovative anti-virus products and services to customers. We intend to continue
to improve our existing products and to develop new products and services, such
as our InterScan AppletTrap software for detecting unknown ActiveX and Java
malicious code.

     Consolidate Leading Market Position in Japan. We believe we are the leading
supplier of anti-virus software products to corporate users in Japan. Sales of
anti-virus software to Japanese corporate end users typically occur through
distributors and systems integrators. To consolidate our market position in
Japan, we are seeking additional distributors, and to expand distribution
through our existing distributor and systems integrator partners. We plan to
continue our focus on the Japanese corporate market, where we believe that some
companies do not yet use anti-virus software to protect their networks.

     Maintain Strong Customer Support Network. To support our international
customer base and to provide real-time service response, we have established a
network of virus analysis centers staffed with our multinational team of 132
computer virus engineers, which includes employees in the United States, Taiwan,
Japan and the Philippines. Our service centers allow customers to send virus
infected files via e-mail for detection and cleaning. We intend to further
foster customer allegiance by working together with our systems integrators,
value-added resellers and strategic partners to provide high levels of service
and support.

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The Trend Micro Enterprise Solution

     Trend Micro offers a suite of integrated anti-virus software and anti-virus
management solutions designed to provide comprehensive, cost-effective
protection at each level of the enterprise network -- from the internet gateway
to the desktop personal computer. Our anti-virus solutions provide the following
benefits:

     .    Advanced Protection Against New Viruses. The core of our anti-virus
          solutions is our proprietary pattern matching, rules-based and
          emulation detection technologies which can identify and remove most
          known viruses, including boot sector, polymorphic, macro and applet
          based viruses. Our Cheetah scanning engine, which incorporates our
          MacroTrap virus detection technology, rapidly detects known and some
          unknown macro viruses. In addition, we continuously collect data on
          new viruses and offer solutions which allow:

               .    important virus events to be recorded in a comprehensive
                    system log;

               .    weekly anti-virus software updates to help protect against
                    emerging viruses; and

               .    monthly anti-virus "health check" status reports.

     .    Multi-level Anti-virus Protection. Our products operate at multiple
          levels in the enterprise network:

               .    first, at the gateway level, before data enters the network
                    server;

               .    second, at the network server, where infected files can be
                    detected before being transmitted to client computers; and

               .    finally, at the client computer itself.

          We believe that protection at the gateway level is of particular
          importance due to the increasingly widespread use of the internet. Our
          InterScan product, with its real-time scanning technology, provides
          virus protection at the network server where data enters the network
          from the internet.

     .    Web-based, Enterprise-Wide Anti-virus Updating, Monitoring and
          Management. Our Trend Virus Control System technology allows anti-
          virus deployment, updating and monitoring to be performed via the
          internet and across the enterprise network.

     We offer products, described more fully below, in the following categories:

               .    enterprise-wide management;

               .    internet gateway virus protection;

               .    server level virus protection;

               .    desktop level virus protection;

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               .    internet-based service solutions; and

               .    integrated small business solutions.

     Enterprise-Wide Management

     Trend Virus Control System is a management tool that allows the network
administrator to monitor, update and manage anti-virus programs on the network
from a single point, regardless of the programs' physical location or platform.
Once installed on a Windows NT server, the Trend Virus Control System registers
every anti-virus product detected on the network and delivers network-wide virus
reports and alerts to the central management console. Using technology that can
automatically update and reconfigure software from a remote location, the Trend
Virus Control System installs, configures and automatically delivers virus
pattern updates to our InterScan VirusWall, ScanMail, ServerProtect and
OfficeScan Corporate Edition anti-virus products. When used in conjunction with
our eDoctor software, the Trend Virus Control System enables network-wide
updating and management of anti-virus software by a service partner, such as a
systems integrator, through the internet. The Trend Virus Control System and
eDoctor give our product suite an important competitive advantage in Japan,
where enterprises tend to rely on remotely based systems integrators to provide
continuing anti-virus support. The Trend Virus Control System supports both
Microsoft Internet Explorer and Netscape/AOL Navigator browsers.

     Internet Gateway Virus Protection

     InterScan VirusWall provides real-time scanning at the network server where
data enters the network from the internet. InterScan VirusWall blocks viruses
hidden in simple mail transfer protocol, file transfer protocol and hypertext
transfer protocol internet traffic. Network administrators can set InterScan
VirusWall to respond to virus infection incidents in any or all of the following
ways:

     .    alerting the system administrator;

     .    isolating the infected file for later cleaning or later action;

     .    deleting the infected file; or

     .    permitting the user to download the file under controlled conditions.

     Check Point Software Technologies Ltd. in August 1998 certified that the
Sun Microsystems Solaris version of InterScan VirusWall can operate compatibly
on Check Point's FireWall-1 internet gateway server. InterScan VirusWall was
named as Network Computing magazine's "Editor's Choice" for anti-virus solutions
in April 1999 and received a similar award from the British magazine Network
Week in April 1999.

     In 1999, we offered free downloading and 30-day use of InterScan VirusWall
to prevent the Melissa virus, which struck networks worldwide in late March
1999, from infecting or damaging users' networks.

     InterScan eManager enables customers to block unsolicited bulk e-mail and
other unwanted e-mail and to control distribution of sensitive e-mail content.
InterScan eManager does this by combining checking of unsolicited bulk e-mail
and the content of other incoming data from the internet into the same scanning
step with InterScan's virus monitoring. InterScan eManager

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also allows the system manager to optimize the use of the network's capacity to
carry information by setting priorities for the delivery of large e-mail
messages. In addition to its capability to scan incoming data from the internet,
InterScan eManager offers profile-based filtering based on customized word lists
to prevent confidential or inappropriate e-mail from being transmitted.
InterScan eManager was introduced in the U.S. and Europe in December 1998 and
was released in Japan in May 1999.

     InterScan WebProtect provides anti-virus protection for Microsoft proxy
servers, a vulnerable point because internet traffic passes directly from the
proxy server to the desktop. InterScan WebProtect scans on a real-time basis,
automatically cleans infected files transferred through the internet, and blocks
unsigned and suspect code written in Authenticode, Microsoft's digital
identification software. InterScan WebProtect also blocks known malicious Java
applets and ActiveX objects. Its "intelligent virus scanning" component
automatically activates whenever internet access takes place, but can be
configured to ignore types of multimedia files that cannot contain viruses,
minimizing the program's effect on performance. InterScan WebProtect sends
customizable warning messages to senders, recipients and the network
administrator when it detects an internet mail infection and automatically
tracks all infections in a detailed activity log. InterScan WebProtect was
released in the U.S. and Europe in November 1996.

     InterScan AppletTrap is the newest addition to the InterScan product suite.
It was introduced in the U.S. and Europe in March 1999. It detects and blocks
both known and unknown malicious Java and ActiveX applets with minimal impact on
internet traffic performance. InterScan AppletTrap first scans at the proxy
server to detect and block applets containing known malicious code. It then uses
patent-pending technology to instruct the destination client personal computer
regarding acceptable behavior and shuts down applets exhibiting malicious
behavior, such as trying to access unauthorized directories, without affecting
network or client personal computer performance. Finally, unknown applets which
have exhibited malicious behavior on a client personal computer are placed on a
list to be automatically excluded at the server where data enters the network
from the internet if such applets attempt to re-enter the network in the future.
InterScan AppletTrap can be used in conjunction with either Netscape/AOL
Navigator or Microsoft Internet Explorer.

     ScanMail acts at the e-mail and groupware server level to combat computer
viruses where they currently most often appear: in document files shared via e-
mail and groupware, which is software that facilitates work among personal
computers users at different remote locations. When it detects a virus, ScanMail
sends a customizable alert message to the administrator, sender and recipient
without delaying the original message. Infected files are cleaned automatically
and sent on to the intended recipients. Using ScanMail's ActiveX program
controls, the network administrator can send files containing unknown viruses to
Trend eDoctor Lab for analysis and disinfection. ScanMail products are available
for Lotus Notes, Microsoft Exchange, Lotus cc:Mail, Microsoft Mail and OpenMail.
ScanMail for Lotus Notes received the Gold Editors' Choice Security Award,
recognizing innovative Lotus-based products, from Lotus Notes and Domino Adviser
Magazine in May 1998. ScanMail for Microsoft Exchange was named as the "best
buy" e-mail anti-virus solution in the January 2000 issue of SC Magazine.

     Server Level Virus Protection

     ServerProtect offers anti-virus protection at the file and application
server level for organizations using Windows NT or Novell NetWare to manage
their local area networks. ServerProtect scans and disinfects remote servers,
sends infection notices, installs anti-virus programs on client personal
computers and automatically generates a virus report log.

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ServerProtect allows administrators of local area networks to securely install
and manage virus protection on multiple servers and domains from a single
console, which can be remotely located.

     Desktop Level Virus Protection

     OfficeScan Corporate Edition is the desktop-based anti-virus component of
our corporate solution. While active at the desktop level, Office Scan Corporate
Edition is centrally controlled and can be installed, managed and upgraded using
the Trend Virus Control System, or deployed through an intranet web page,
Windows NT remote server, Microsoft System Management Server or login script.
Centralized administration ensures that all users have the most up-to-date
software and virus descriptions, limits client modifications to the software,
and ensures that reports of virus activity reach the system administrator.

     PC-cillin, which is marketed in Japan as Virus Buster, is our anti-virus
product for the home personal computer and workstation. PC-cillin removes
viruses without interrupting programs then running on the user's personal
computer or workstation, when infections occur. PC-cillin includes an easy-to-
use graphic user interface, and is available in Windows NT Workstation, Windows
98, Windows 95 and Windows 2000 Professional versions. Virus Buster was the only
product among six personal computer anti-virus products surveyed to receive a
"four-star" rating from the Japanese magazine PC Computing in September 1998. PC
Computing is published by SOFTBANK. The latest version of PC-cillin enables
users to prevent access to designated web page addresses. The latest version of
Virus Buster released in Japan also includes a one-year warranty providing for a
refund of the product's purchase price if, under conditions set forth in the
product package, new viruses infect and cause damage to a user's files or
programs. Trend Micro is insured against liabilities, subject to certain
limitations and exclusions, arising from this warranty service.

     Trend ChipAway Virus provides hardware-level protection to stop boot-sector
viruses from infecting the computer during the period before the operating
system and traditional anti-virus software load. This product works by encoding
virus protection in the basic input/output system, read-only memory chips used
to start the computer before its operating system software loads.

     Internet-Based Support Services

     eDoctor is an anti-virus service to which purchasers of the Trend Virus
Control System can subscribe for a monthly per-user fee. Qualified providers of
first-line support, typically systems integrators and internet service
providers, acting as "Premium Security Partners," use the management
capabilities of Trend Virus Control System to install virus protection software
on the customer's network, to resolve virus incidents and to continually
diagnose and maintain virus protection systems remotely over the internet.
eDoctor includes around-the-clock access to Trend Micro engineers who work with
the Premium Security Partner and the customer in real-time to resolve virus
incidents as they occur. Premium Security Partners will receive a significant
portion of the monthly fee and are expected to play a key role in marketing the
service. The role of the Premium Security Partner is particularly important in
Japan, where enterprise users typically look to systems integrators to manage
their networks and to provide virus solutions. eDoctor was introduced in Japan,
the U.S. and Taiwan in December 1998. In September 1999, we also announced the
establishment of the eDoctor Global Network, a worldwide internet anti-virus
service initiative which builds malicious code protection directly into the
internet infrastructure. The eDoctor Global Network enables customers to obtain
virus protection as a value-added service from telecom companies, internet
service providers and other managed service providers. Service providers who are
part of the eDoctor Global Network include SECOM, JoS, UniSVR, Otsuka

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Shokai, PSINet, Internet Security Systems, U S West, MCI's UUNet division,
Sprint and Compaq Services.

     Trend eDoctor Lab is a web-based virus analysis service available generally
to corporate end users to send virus-infected files via e-mail to one of Trend
Micro's internationally located virus analysis centers for detection and
cleaning. Files containing unusual or unknown viruses are automatically routed
to the Trend Micro virus expert on duty.

     HouseCall is online scanning software which allows personal computer users
to have virus infections detected and removed over the web. Upon detecting a
virus, HouseCall lists its name and the infected file. If the virus cannot be
removed, HouseCall gives the user the opportunity to delete the file. The
service is accessible to all internet users from our website. HouseCall
demonstrates Trend Micro's anti-virus expertise and serves as a useful tool to
introduce potential customers to Trend Micro's family of products.

     Integrated Small Business Solution

     OfficeScan SBS is designed for the Microsoft Small Business Server.
OfficeScan SBS combines file server protection, e-mail and groupware server
protection for Microsoft Exchange, and desktop-based protection in a single
package. It provides centralized installation, administration and reporting for
networks of up to 25 workstations. OfficeScan SBS was recommended as an
"excellent choice" by Computer Reseller News, a newsletter published for
computer resellers, in May 1998.

Technology

     We believe that our innovative anti-virus technologies are an important
competitive advantage. Key technologies used in Trend Micro products include the
following:

     Cheetah is the core of our anti-virus technology and our newest scanning
engine. Cheetah, which is incorporated in all of Trend Micro's anti-virus
products, detects most known viruses, including boot-sector, polymorphic, macro
and applet-based viruses as well as some unknown viruses. When a virus is
detected, Cheetah alerts system users based upon instructions selected by a
network administrator and either blocks the virus-infected file from being
forwarded or cleans and quarantines it, with notice to the user, mail recipient
and/or network administrator. Cheetah also incorporates the following scanning
technologies and features:

     .    Trend Micro's proprietary SoftMice simulator, which traces, decrypts
          and extracts polymorphic viruses;

     .    Trend Micro's DeepScan technology, which tracks a program's execution
          through multiple-layered files and locates viruses buried in the file
          body;

     .    Wildcard virus scanning capability to detect variant viruses;

     .    Scanning capability for 19 types of compressed files and decoding
          capability for MIME, BinHex, Base64 and UUEncoded files; and

     .    A specific scanning module for detecting known malicious Java code.

     MacroTrap is an advanced virus detection technology incorporated into the
Cheetah scanning engine. Unlike simple pattern matching detection technologies
which identify viruses by

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their unique software codes, MacroTrap uses rule-based scanning to detect known
macro viruses and mutated versions of macro viruses by executing the code in a
virtual environment that emulates the actual system environment in which the
code will be run. Executed code that does not match the software code of any
known virus but nonetheless violates predetermined rules of "good behavior" is
then identified as suspect and "trapped." This method is particularly well
suited for macro viruses because such viruses are very easily created and
therefore more varied. Because it uses the same technology upon which Word and
Excel files are based, MacroTrap extracts only the affected portion of each word
processing or spreadsheet file it scans. This minimizes scanning time and the
processing burden on the central processing unit.

     AppletTrap, our newest technology, detects known and unknown malicious
ActiveX controls and Java applets with minimal impact on internet traffic
performance. AppletTrap uses pattern-matching to block known malicious ActiveX
controls and Java applets before they enter the network. AppletTrap's patent-
pending technology also enables client personal computers to terminate unknown
ActiveX controls or Java applets that are behaving in an abnormal manner before
they can damage the computers' hard drive or spread elsewhere in the network.

     InterScan: Server Pipeline is our patented technology which enables
scanning of data which has been transmitted through the internet, and also the
review of the content of e-mail files. The scanning and detection functions are
performed at the server level, enabling viruses to be detected and eliminated
before they spread to client personal computers via e-mail or file exchange. The
InterScan technology forms the basis of Trend Micro's product suites for the
enterprise, including the InterScan VirusWall, ServerProtect, Scan Mail and
eManager products.

     Cascade Update is a management program which centrally deploys anti-virus
software from intranet servers to client personal computers. Upon installation,
an IntraScan agent program remains on the client personal computer, configured
to respond to messages from the server that indicate when new virus pattern
updates or program upgrades or configuration changes are available. The agent
program automatically downloads all new anti-virus program components from our
website to the client personal computer. OfficeScan for Microsoft Small Business
Server is Trend Micro's first implementation of the Cascade Update technology.

Research and Product Development

     Trend Micro's research and product development activities focus on the
development of new anti-virus and security software, enhancements to existing
products and integration of products to enable monitoring, updating and
management via the internet. We conduct research and development at our Tokyo
headquarters and our U.S. and Taiwan subsidiaries and have a research staff of
147 engineers. Complementing our internal development efforts, we are members of
industry-level initiatives such as the Association of Anti-virus Asia
Researchers group launched in Hong Kong in September 1998. Our engineers'
participation in this group gives us additional access to information regarding
newly discovered viruses.

     Research and development expenditures, consisting primarily of software
development costs and research and development staff salaries and benefits,
increased from (Yen)557.0 million in 1997 to (Yen)960.2 million ($8.5 million)
in 1998 and (Yen)994.3 million ($9.7 million) in 1999.

Sales and Marketing

     We sell our products primarily to corporate end users on a site license
basis through systems integrators, distributors and value-added resellers, with
the remaining portion consisting

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largely of retail package software sales through distributors. As a result, we
are substantially dependent on these third parties. Our agreements with
distributors are generally nonexclusive, do not have minimum purchase
requirements and may be terminated by either party without cause. Our current
marketing efforts are targeted primarily at large to mid-size corporations, and
to a lesser extent, small businesses and individual end users. We work with
systems integrators and value-added resellers, through which most of our sales
are made, to increase the brand recognition and visibility of our products in
the network security market. We also promote sales of our products as a suite so
that corporate end users can benefit from comprehensive anti-virus protection
throughout their enterprise networks. As part of these efforts, we also
disseminate product and industry information through our website. In addition,
we advertise in trade publications and exhibit our products at trade shows
worldwide, including World PC Expo, Windows World Expo Japan, Comdex Japan in
Japan, Comdex, InfoSec, NetWorld and Interop, Internet World, ISPCON, and the
RSA Conference in the United States, CeBit in Germany and the Network and
Windows NT shows in Britain.

     Japan

     We sell our products in Japan to both corporate and individual end users
primarily through systems integrators and distributors, and conduct a limited
amount of direct sales to end users, including online sales through a reseller's
website. Historically, most of our revenues have been derived from sales in
Japan. We expect that sales in Japan will continue to represent a significant
percentage of our revenues in the future.

     Distribution Through Systems Integrators and Distributors. Virtually all of
our sales to Japanese corporate end users are made through systems integrators,
with remaining sales coming mostly from direct sales to major corporate
customers. In Japan, systems integrators play a much larger role in delivering
management information services than in the United States, providing primary
computer support services such as installation, systems integration, upgrades
and maintenance.

     Historically, a significant percentage of our net sales have been sales to
SOFTBANK. For example, sales to SOFTBANK totaled approximately (Yen)2.4 billion
($21.1 million) or 24% of net sales in 1998 and (Yen)2.5 billion ($24.0 million)
or 18% of net sales in 1999. The majority of these sales in 1998 took place
through Vaccine Bank, a cooperative marketing program which we maintained with
SOFTBANK from 1997 to early 1999. The majority of sales to SOFTBANK in 1999
consisted of SOFTBANK's sales of our products to systems integrators.

     Relationship with SOFTBANK. In December 1996, Trend Micro and SOFTBANK
entered into two agreements for an investment by SOFTBANK in Trend Micro and the
distribution by SOFTBANK of our products in Japan. The distribution agreement
was an oral agreement granting SOFTBANK the non-exclusive right to distribute
all of our anti-virus software products in Japan. Individual sales under this
agreement were effected on a purchase-order basis. In June 1998, we and SOFTBANK
entered into a written distribution agreement giving SOFTBANK a non-exclusive
right to distribute our InterScan product suite in Japan at volume-based
discount rates. Under a December 1998 memorandum to the 1996 oral agreement,
SOFTBANK included Trend Virus Control System and ServerProtect for Windows NT in
a number of computing products distributed by SOFTBANK. On January 1, 1999, we
entered into a written agreement with SOFTBANK superseding the 1996 agreement
and granting SOFTBANK the non-exclusive right to distribute in Japan all of our
products other than the InterScan products, which continue to be covered by the
1998 written agreement. Individual sales under the January 1999 master
distribution agreement were effected on a purchase-order basis. The January 1999
master

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distribution agreement provided for percentage rebate payments to SOFTBANK based
on the volume of sales of covered products.

     Currently, all distribution by SOFTBANK of our products in Japan is covered
by an October 1999 distribution agreement with SOFTBANK COMMERCE, an indirect
wholly-owned subsidiary of SOFTBANK. This distribution agreement gives SOFTBANK
COMMERCE the non-exclusive right in Japan to distribute all of our products. It
is automatically renewable for successive one-year terms, unless either party
exercises its right of non-renewal by giving prior written notice. The October
1999 distribution agreement supersedes all prior agreements between SOFTBANK and
Trend Micro relating to distribution of Trend Micro's products. We make rebate
payments to SOFTBANK based on SOFTBANK's achievement of sales targets agreed
upon between SOFTBANK and us.

     Service Provider and Other Relationships. In December 1998, we entered into
an alliance with SECOM, a home security service provider. We certify SECOM to
provide eDoctor and other anti-virus software to update, monitor and maintain
SECOM customers' computer networks. We plan to certify additional service
providers to offer 24-hour service and support to customers. We have developed
with Hitachi Corporation a solution that allows users of Hitachi's JP1 network
management software to click on a command icon in Hitachi's JP1 product to
access our Trend Virus Control System product. We have developed a similar
solution in cooperation with Fujitsu that allows users of SystemWalker,
Fujitsu's network of operating and management software, to use Trend Virus
Control System. In September 1999, we agreed to license InterScan VirusWall
technology to PSINet K.K., a Japan internet service provider, enabling PSINet to
provide virus scanning services to its corporate customers as part of its
comprehensive security services. In March 2000, Otsuka Shokai began offering to
its "a-mail" hosting service customers a virus detection and removal service
developed jointly with Trend Micro. We also plan to pursue alliances with other
internet service providers, which we believe are becoming increasingly important
in the Japanese market.

     Recent Developments. In October 1999, we agreed with NTT Data, Hitachi,
Cisco Systems Japan and S&T Consulting to form NTT Data Security Corporation, a
joint venture which is designed to provide comprehensive network security
services. Each of the five partners has expertise in a different area of network
security, and we are contributing our antivirus and internet security expertise
to the venture. The joint venture began its commercial operations in January
2000.

     In February 2000, we acquired a majority ownership interest in Nihon
Unisoft Corporation, a Japanese Unix software solution provider in the
networking communications and internet domain. We made this acquisition through
ipTrend Incorporated, a wholly-owned subsidiary that we established in January
2000. As a result of the acquisition, ipTrend and Nihon Unisoft intend to
jointly promote development of their internet-focused technology. The parties
began offering Linux components and communication protocols to major internet
service providers, information-technology vendors and communication companies in
April 2000.

     United States

     Our U.S. sales strategy has evolved with the development of the anti-virus
software market as a whole, moving from a focus on packaged software sales for
the personal computer to our current focus on corporate protection. Initially,
we distributed and sold mainly packaged anti-virus software for the personal
computer in the U.S. through a republisher. As a market has developed for
selling products to corporate customers with multiple users, we have shifted our
strategy to

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building relationships with value-added resellers and distributors who sell to
corporate customers, and to cooperating with major hardware and software
manufacturers. Our current focus in the U.S. is developing these strategic
partnerships in the server, security, groupware and router areas to take
advantage of our product strengths and partners' marketing channels and, in the
process, to increase brand awareness of our products. As of March 2000, we had
30 employees dedicated to strategic partner and distributor relationships and 5
employees focusing on direct sales efforts in the U.S. Our direct sales efforts
in the U.S. focus on sales to Fortune 1000 companies and government accounts.

     Strategic Partnerships. We have entered into agreements with Check Point,
Compaq, Hewlett-Packard, IBM/Lotus, Lucent Technologies, Microsoft, Oracle,
Sprint, UUNET Technologies and US West which include cooperative marketing
activities such as these vendors' referral of customers to our products and
reference to our products in their product literature and websites. Our
agreements with these vendors also typically provide for co-development and
licensing arrangements so that our and the vendors' products operate smoothly
when used together. Under one relationship with Microsoft, InterScan WebProtect
is available to users of Microsoft Proxy through a web link. We have also
licensed Microsoft to include ScanMail in Microsoft's Resource Kits and have
developed a compatible version of OfficeScan for the Microsoft Small Business
Server. Check Point has certified InterScan VirusWall for Solaris and Window NT
to be compatible with Check Point's Firewall-1 enterprise security solution.
Under one agreement with Compaq, our anti-virus products are described as a
compatible enterprise anti-virus solution in Compaq Active Answers, an online
information service for marketing and buying enterprise computing solutions.

     We have licensed Compaq to provide technology found in ScanMail for
Microsoft Exchange to Compaq customers who outsource this e-mail anti-virus
protection function to Compaq. Under an agreement with Hewlett-Packard, we
provide virus protection products to Hewlett-Packard's global CoVision internet
solutions program. Hewlett-Packard has also certified Trend Virus Control System
for use in conjunction with Hewlett-Packard's OpenView Node Manager, and has
agreed to resell our products and services through Hewlett-Packard's North
American Local Products Organization. This arrangement gives us access to
leading resellers of Hewlett-Packard products and allows our products and
services to be included as part of an integrated Hewlett-Packard solution. Trend
Micro is also a "Lotus Premium Business Partner" which allows us to integrate
our anti-virus solutions more closely with Lotus Notes/Domino and cc:Mail. In
December 1998, we released ScanMail for Lotus Domino for the IBM AS/400
platform. Under our April 1999 agreement with Lucent Technologies, Lucent will
promote InterScan VirusWall as a compatible anti-virus solution for use in
conjunction with Lucent's VPN Gateway and Managed Firewall network access
control system, and will facilitate marketing of our products. We have also
licensed Sprint to provide its customers with InterScan VirusWall scanning
capability at the internet gateway. A similar arrangement with US West allows US
West to use InterScan VirusWall to automatically scan its customers' incoming
and outgoing internet e-mail attachments for viruses. We have also licensed
UUNET Technologies, the internet services division of MCI WorldCom, to provide
virus scanning services using ScanMail technology to UUNET's Lotus Notes hosted
customers.

     Distributors and Value-Added Resellers. Our principal distributors and
value-added resellers in the U.S. are Software House International, Softmart,
Vanstar, Interwork Technology, Ingram Micro, Midwest Systems, ASAP Software
Express and Tech Data. Value-added resellers typically purchase products for
resale to corporate customers, and provide limited update services and technical
support. Distributors do not provide such additional services and support. To
develop these relationships, in October 1997 we established the Trend Enterprise
Security

                                       52
<PAGE>

Solutions reseller channel program which provides qualified resellers with
training, marketing materials and sales referrals. Our website matches customers
with certified distributors based on customers' geographical location.
Approximately 50 resellers currently participate in our reseller channel
program, including Secure IT, Netrex, Osage Systems and ASAP Software Express.
We also provide such services and support to targeted corporate customers
directly.

     Other Distribution Channels. We are also pursuing sales growth through
other distribution channels including alliances with internet service providers
and other providers of internet-related services. Under an agreement with
Infonet Services Corporation, a global internet service provider, we receive a
percentage royalty based on sales of our e-mail and internet traffic virus
protection scanning services to Infonet customers. In addition, InterScan
VirusWall has been added to the virus scanning services offered by Pilot Network
Services, a provider of secure internet services to corporations. We also
distribute our Virus Buster product under the name "PC-cillin" directly to end
users who download it from our website.

     Other Parts of the World

     Outside of Japan and the United States, we sell our products mostly to
corporate end users through distributors, resellers and value-added resellers,
with some direct sales to corporate end users and retail customers. A majority
of these sales in Asia were to corporate end users through systems integrators
and distributors. We have formed alliances with internet service providers in
Australia, Hong Kong and Taiwan to provide internet-based services such as e-
mail security. Trend Micro currently plans to explore additional partnerships
with internet service providers worldwide.

     The majority of our European revenues are from sales of site licenses to
corporate users. Our principal systems integrators and distributors in Europe
are C2000, MME and Peapod Distribution.

     As of April 2000, we had 13 employees dedicated to our "brand-name"
partnership, reseller, value-added reseller and distributor relationships in
Europe and 9 employees focusing on direct sales efforts.

     Potential customers accessing our website who wish to purchase products are
referred to a list of resellers, based on the country where the customer is
located. We are continuing to recruit other network security-oriented systems
integrators and value-added resellers in Europe and Asia to target a broader
range of prospective corporate customers. Our partnerships with global major
hardware and software vendors also enhance our marketing efforts in Europe and
Asia as well as in the U.S.

Operations

     In Japan, we outsource assembly, packaging and shipping of all of our anti-
virus software products to value-added resellers. Our Taiwanese subsidiary and,
in some cases, third party service providers assemble, package and ship products
to be sold in the United States, Europe and Asia other than Japan. Products are
generally shipped within seven days of receipt of an order and, accordingly,
there is minimum order backlog at any time.

                                       53
<PAGE>

Competition

     The markets for our products are highly competitive and changing rapidly,
and we expect competition to increase in the near term. We believe that the
principal competitive factors affecting the anti-virus software market are:

     .    performance, including the number and type of viruses which can be
          detected and effectiveness in detecting and cleaning virus-infected
          files;

     .    product features;

     .    ease of use;

     .    brand recognition;

     .    customer service and technical support;

     .    company reputation; and

     .    price.

     Our primary competitors in the anti-virus software market are Network
Associates, vendor of the McAfee VirusScan and Dr. Solomon's Toolkit product
lines, and Symantec Corporation, vendor of Norton brand anti-virus products.
Other competitors include Computer Associates International, Inc., Data Fellows
Ltd., which distributes anti-virus software in Japan through Yamada Corporation,
Sophos Plc, Finjan Software Ltd. and Security-7 Ltd. While we believe that our
commitment to technological innovation and integrated product suites represents
a competitive advantage over Network Associates and Symantec, these companies
have generally greater name recognition, broader product lines, access to larger
customer bases and greater financial, distribution and other resources.

     Network Associates and Symantec have been allocating significant resources
to the Japanese anti-virus software market in recent years. In 1997, Symantec
released a Windows 95 compatible Japanese version of its virus protection
software in Japan, and Network Associates acquired a Japanese virus protection
software maker, Jade K.K. In the U.S., we believe that Network Associates and
Symantec have allocated greater resources than we have to the development of
their anti-virus businesses and have significantly larger customer bases.

     With the introduction of InterScan eManager in October 1998, we entered the
market for non-virus security products. Our primary competitors in this market
are Integralis Technology Ltd. and Worldtalk Communications Corp. We expect to
encounter competition from larger, more established companies as we begin to
offer other non-virus security products.

Intellectual Property

     Our ability to compete successfully depends in part on our ability to
protect the proprietary technology contained in our software products. We rely
upon a combination of patent, trademark, copyright and trade secret laws and
contractual provisions to establish and protect proprietary rights in our
software.

                                       54
<PAGE>

     Our U.S. and Taiwanese subsidiaries hold the following principal patents
relating to core technologies:

<TABLE>
<CAPTION>
           Name              Status     Registration    Registration          Applicant/Patentee
           ----              ------         Date           Number             ------------------
                                        ------------    ------------
<S>                         <C>        <C>             <C>              <C>
MacroAgent pre-boot         Patented      8/22/1995       5,444,850     Trend Micro Incorporated
 authentication                                                         (USA)

Network and Workstation     Patented     10/21/1997       5,680,547     Trend Micro Incorporated
 Access pre-boot                                                        (Taiwan)

Apparatus and method for    Patented      3/30/1999       5,889,943     Trend Micro Incorporated
 e-mail virus detection                                                 (Taiwan)
 and elimination

InterScan: Server pipeline  Patented      4/22/1999       5,623,600     Trend Micro Incorporated
                                                                        (USA)

System apparatus and        Patented      9/14/1999       5,951,698     Trend Micro Incorporated
 method for macro virus                                                 (Taiwan)
 detection and removal

Event-triggered iterative   Patented      9/28/1999       5,960,170     Trend Micro Incorporated
 virus detection                                                        (Taiwan)

Computer network            Patented      11/9/1999       5,983,348     Trend Micro Incorporated
 malicious code scanner                                                 (USA)
</TABLE>

The duration of these patents is 17 years from the date of registration. We plan
to transfer the ownership of these patents to Trend Micro.

     We do not typically enter into signed license agreements with our
corporate, government and institutional customers who license products directly
from us. We include an electronic version of a "shrinkwrap" license in all of
our electronically distributed software and a printed license in the box for our
packaged products in order to protect our copyrights in those products. The
enforceability of these licenses generally is uncertain in the United States as
well as in foreign jurisdictions. In addition, the laws of some foreign
countries either do not protect proprietary rights or offer only limited
protection for those rights.

     In addition, as is common in the software industry, third parties may sue
us for alleged infringement of their intellectual property rights. We may also
have to take legal action to defend our intellectual property from infringement.

     We also generally enter into confidentiality agreements with our employees,
and limit access to and distribution of proprietary information.

Legal Proceedings

     In May 1997, Trend Micro Incorporated, our U.S. subsidiary, sued Network
Associates, formerly McAfee Associates, Inc., and Symantec in the U.S. Federal
District Court for the Northern District of California alleging that some of
their products infringe a U.S. registered patent held by Trend U.S. relating to
a system and method for detecting computer viruses in a network

                                       55
<PAGE>

environment and seeking injunctive relief and unspecified money damages. The
products which incorporate the patented technology are InterScan VirusWall,
InterScan eManager, InterScan WebProtect, InterScan AppletTrap, ScanMail and
other of our products which we sell for inclusion in our customers' products.
Trend U.S. settled its claims against Symantec in April 1998 by entering into a
patent cross-license arrangement which included an agreement to exchange samples
of viruses. In June 1997, Network Associates denied infringement, alleging that
Trend U.S.'s patent is invalid, and filed counterclaims against Trend U.S.
alleging unfair competition, false advertising, trade libel and interference
with prospective economic advantage. These counterclaims are based primarily on
Network Associates' allegations that Trend Micro made false claims about Network
Associates products in its advertising and on its website. In April 2000,
Network Associates filed suit against Trend U.S. in the U.S. Federal District
Court for the Northern District of Texas, alleging that Trend U.S.'s anti-virus
software packages, including the Trend Virus Control System, infringes a Network
Associates patent which was issued on February 22, 2000. Trend Micro believes
that the final disposition of these matters will not have a material adverse
effect on Trend Micro's business or results of operations.

     We are currently in negotiations with Network Associates to settle all
outstanding litigation between the parties. Although we expect to reach
agreement with Network Associates on terms that are acceptable to us, we cannot
assure you that we will be able to do so.

Employees

     As of March 2000, we had 851 employees, of whom 593 are located in Asia,
146 are located in the United States, 75 are located in Europe and 37 are
located in other regions. None of our employees is represented by a labor union
and we have not experienced a work stoppage. We believe that our employee
relations are good.

Facilities

     Our headquarters are located in Tokyo, Japan, where we lease 1,537 square
meters of office space under a lease which expires in March 2002. We also lease
an aggregate of approximately 210 square meters of office space in Osaka and
Fukuoka.

     We lease approximately 20,000 square feet of office space in Cupertino,
California under a lease which expires in July 2002. We lease office space for
our regional sales, research and development and sales office in Taiwan and for
our customer service center in the Philippines. We also lease small sales
offices in Korea, China, Hong Kong, Malaysia, Australia, Germany, Italy, France,
the United Kingdom, Mexico, Brazil and Argentina.

                                       56
<PAGE>

                                  MANAGEMENT

     The following table shows information regarding Trend Micro's directors and
executive officers as of April 30, 2000. Our directors serve on the board for
two year terms and statutory auditors serve for three year terms. Our executive
officers serve at the discretion of the board. The terms of Messrs. Chang, Lai
and Kitao and Ms. Chiang expire upon the completion of our ordinary
shareholders' meeting in 2001. The terms of Messrs. Nakanishi and Watanabe
expire upon the completion of our ordinary shareholders' meeting in 2002. The
terms of Messrs. Sano, Kajikawa and Kawashima expire upon completion of our
ordinary shareholders' meeting in 2002. The term of Mr. Hasegawa expires upon
completion of our ordinary shareholders' meeting in 2003.

<TABLE>
<CAPTION>
Name                               Age      Position(s)
- ----                               ---      -----------
<S>                             <C>         <C>
Steve Ming-Jang Chang              45       Representative Director; President, Chief Executive Officer and
                                            Chairman of the Board
Andrew Kwok-To Lai                 43       Director; Chief Operating Officer and Executive Vice President
Eva Yi-Fen Chiang                  41       Director; Chief Technology Officer and Executive Vice President
Hiroyuki Nakanishi                 42       Director; Chief Financial Officer
Toshihiro Watanabe                 38       Director
Yoshitaka Kitao                    49       Director
Fumio Hasegawa                     60       Statutory Auditor
Mitsuo Sano                        43       Statutory Auditor
Akira Kajikawa                     41       Statutory Auditor
Katsuya Kawashima                  37       Statutory Auditor
</TABLE>

     Steve Ming-Jang Chang is the founder, Representative Director, Chairman of
the Board, President and Chief Executive Officer of Trend Micro. Mr. Chang
established Trend Micro's predecessor company in 1988, where he was President
and Chief Executive Officer. He has served as Chairman of the Board, President
and Representative Director of Trend Micro since March 1997. Under the Japanese
Commercial Code, the representative director of a Japanese corporation has
authority to enter into agreements on behalf of the company without
authorization from the company's board of directors. Prior to founding Trend
Micro, Mr. Chang was a sales engineer at Hewlett Packard Taiwan, from January
1977 to December 1978. He then worked as general manager of Ton Sin Information
Inc. in Taiwan from January 1979 to December 1981. Mr. Chang founded AsiaTek
Inc. in January 1982 and was its president until November 1988. Mr. Chang holds
a B.S. in Applied Mathematics from Fujen University and an M.S. in Computer
Science from Lehigh University.

     Andrew Kwok-To Lai has served as Chief Operating Officer of Trend Micro and
an Executive Vice President of Trend U.S. since 1996. He was appointed as a
Director of Trend Micro in March 1996. He served as an advisor to Trend Taiwan
from September 1995 to February 1996. Mr. Lai began his career as a hardware
engineer in 1981, when he joined Wycatt. Mr. Lai's software industry experience
includes positions as Sales Account Manager, NetWare Center Manager and ten
years as Asia Pacific Regional Director with Novell. Mr. Lai holds an A.S. from
Ricks College and attended the Electrical Engineering Program at Brigham Young
University.

     Eva Yi-Fen Chiang has served as Chief Technology Officer of Trend Micro
since 1996 and as a Director of Trend Micro since August 1997. Ms. Chiang has
also served as the Executive Vice President of Trend U.S. since May 1988. Ms.
Chiang holds a B.A. in philosophy from Cheng Chi University in Taiwan and M.B.A.
and M.I.S. degrees from the University of Texas at Dallas. Ms. Chiang is Steve
Chang's sister-in-law.

                                       57
<PAGE>

     Hiroyuki Nakanishi has been a Director of Trend Micro since March 2000 and
is currently its Chief Financial Officer. Mr. Nakanishi has also served as a
Director of ipTrend Incorporated since January 2000. Mr. Nakanishi is currently
a director of SOFTBANK INVESTMENT CORP. and Softbank Ventures, Inc. Mr.
Nakanishi began his career with Nomura Securities Co., Ltd., in 1982 and was
Executive Manager of the Finance Department of SOFTBANK Corp. from 1995 to 1998.
Mr. Nakanishi attended Hitotsubashi University where he received a B.A. in Law.

     Toshihiro Watanabe was appointed as a Director of Trend Micro in March 2000
and has been Head Manager of Sales and Marketing at Trend Micro since February
2000. Other positions Mr. Watanabe has held with Trend Micro include Department
Manager of Sales & General Affairs and Human Resources from October 1997 to
April 1998 and Director of Sales from May 1998 to January 2000. Prior to joining
Trend Micro, Mr. Watanabe was a management and insurance business consultant
from 1993 to 1997. Mr. Watanabe holds a B.A. in Economics from Hiroshima Shudo
University.

     Yoshitaka Kitao has been a Director of Trend Micro since March 1997. Mr.
Kitao is currently Executive Vice President and Chief Financial Officer of
SOFTBANK, President and Representative Director of each of SOFTBANK FINANCE
CORPORATION and CyberCash K.K., Chairman and Representative Director of SOFTBANK
ACCOUNTING CORPORATION and a director of SOFTBANK America and SOFTBANK RIGHTS
AGENCY CORPORATION. He also serves as the President and Representative Director
of each of the following SOFTBANK affiliates: Morningstar Japan K.K., E*TRADE
JAPAN K.K., FOREXBANK Co., Ltd., INSWEB Japan K.K., E*Advisor Co., Ltd., SOFT
TREND CAPITAL Corp., E-Loan Japan K.K. and SOFTBANK INVESTMENT CORPORATION. In
addition, Mr. Kitao serves as a director of Softbank Ventures, Inc. and SOFTBANK
CONTENTS PARTNERS CORPORATION. Prior to joining SOFTBANK in June 1995, Mr. Kitao
was Director of Nomura Wasserstein Perella Co., Ltd. from 1992 to 1993, Managing
Director of Wasserstein Perella & Co., Inc. from 1989 to 1992 and was the
General Manager for the Nomura Securities Co., Ltd.'s Corporate Finance and
Services Dept. 3 from 1992 to 1995. Mr. Kitao holds a B.A. in Economics from
Keio University.

     Fumio Hasegawa has been a Statutory Auditor of Trend Micro since March
2000. Previously, Mr. Hasegawa was Manager of the Managerial Accounting Section
and Sub-manager of the Accounting Department of SHOWA SHELL SEKIYU K.K. from
1994 to 1996 and was a Director of Tokyo Shell Pack K.K. from 1996 to 2000. Mr.
Hasegawa holds a B.C. in Accounting from Chuo University.

     Mitsuo Sano has been a Statutory Auditor of Trend Micro since March 1997.
He is also currently a Statutory Auditor of Yahoo! Japan Corporation, and other
SOFTBANK affiliates including Morningstar Japan K.K., SOFTBANK ACCOUNTING
CORPORATION, Softbank Ventures, Inc., SOFTBANK RIGHTS AGENCY CORPORATION and
CyberCash K.K. He is also a director of E*TRADE Securities Co., LTD. Previously,
Mr. Sano served as General Manager of SOFTBANK's Accounting and Finance
Department from December 1995 to May 1998 and as a manager in the Tokyo office
of Price Waterhouse from October 1982 to September 1990. Mr. Sano holds a B.A.
in Business Administration from the Yokohama National University and is
qualified as a certified public accountant in Japan.

     Akira Kajikawa has been a Statutory Auditor of Trend Micro since March
1997. He is currently also a member of the Board of Directors of Yahoo! Japan
Corporation, SOFTBANK RIGHTS AGENCY CORPORATION, and SOFTBANK INVESTMENT
CORPORATION. Previously, Mr. Kajikawa was a General Manager in the Finance
Department of SOFTBANK from

                                       58
<PAGE>

November 1996 to May 1997. Mr. Kajikawa started his investment banking career at
Nomura Securities Co., Ltd., which he joined in April 1983. At Nomura
Securities, he held various positions, including those in its foreign
subsidiaries in the United Kingdom, Australia and Singapore. Mr. Kajikawa holds
a B.A. in Commerce from Hitotsubashi University and an M.B.A. from the London
Business School.

     Katsuya Kawashima has been a Statutory Auditor of Trend Micro since March
1999. Mr. Kawashima is also a director of SOFTBANK FINANCE CORPORATION, E*TRADE
JAPAN K.K., E*Advisor Co., Ltd. and E*TRADE Securities Co., LTD., a statutory
auditor of INSWEB Japan K.K., Director of SOFTBANK INVESTMENT CORPORATION and
Director and Chief Operating Officer of Morningstar Japan K.K. From April 1985
to July 1995, he worked at Nomura Securities Co. Ltd. where his final position
was deputy section manager. Mr. Kawashima holds a B.A. in Economics from
Yamaguchi University.

Compensation

     For the fiscal year ended December 31, 1999, the aggregate compensation of
all directors and executive officers paid or accrued by Trend Micro was
(Yen)72.9 million ($713,270).

     Under the Japanese Commercial Code and local practice, we may make
severance payments to a retired director or statutory auditor with shareholder
approval, if our management proposes such payments based on a resolution of our
board of directors. However, we do not intend to make such a proposal for
directors. We have an internal formula to determine the amounts of severance
payments to directors and statutory auditors if we were to make such a proposal
for statutory auditors. We have not recorded any liabilities relating to
severance payments to directors and statutory auditors as of December 31, 1997,
1998 and 1999 because we have no liabilities to directors, and related
liabilities to statutory auditors were insignificant.

Incentive Plans

     1997 Incentive Plan and 1998 Incentive Plans

     Our 1997 incentive plan and 1998 incentive plans provide for the grant of
warrants to purchase shares to employees and directors. All directors and
employees of Trend Micro and its subsidiaries, other than directors or employees
residing in California and holding more than 10% of the outstanding shares, were
eligible to participate in the incentive plans.

     All of the warrants authorized under the incentive plans, representing an
aggregate of 5,326,800 shares, have been issued. As of April 30, 2000, warrants
to purchase a total of 3,549,300 shares have been exercised, warrants to
purchase a total of 374,400 shares have been retired, and warrants to purchase a
total of 1,403,100 shares remain issued and outstanding. All warrants issued to
date under the incentive plans were issued with an exercise price of (Yen)285
per share. Under the incentive plans, any warrants that have been retired,
expired, become unexercisable or forfeited for any reason are not available for
any future issuances.

     If required by applicable regulations, the exercise price of a warrant will
be not less than 85% of the fair market value of the shares issuable upon
exercise of the warrant on the date of grant. The warrants are exercisable at a
rate determined by the board of directors in its sole discretion. However, the
incentive plans provide that in no event will any warrant become exercisable at
a rate less than 20% per year for each of the first five years from its issue
date, and no warrant is exercisable after 10 years from its issue date.

                                       59
<PAGE>

     The board of directors may amend the incentive plans and warrants and may
assume, repurchase or resell outstanding warrants at any time in compliance with
applicable laws, but any amendment or modification which materially alters or
impairs a warrant holder's rights requires the warrant holder's prior written
consent. The incentive plans permit the board of directors to impose transfer
restrictions on the shares issuable upon exercise of the warrants, including a
right of first refusal to purchase the shares. Each of the incentive plans
terminates ten years after its respective date of adoption.

     Due to restrictions under the Japanese Commercial Code, the warrants were
not issued directly to eligible employees but were initially issued as unsecured
bonds with detachable warrants with a face value equal to the exercise price of
the warrants. The bonds were issued and sold to SOFTBANK, upon which we fully
redeemed the bonds and repurchased the warrants. Following these transactions,
we transferred some of the warrants to our Japanese employees and sold the
remaining warrants to our subsidiaries for transfer to employees at our
subsidiaries.

     1999 Incentive Plan

     We have adopted the Trend Micro Incorporated 1999 incentive plan. The 1999
incentive plan has two components:

     .    we have issued warrants to acquire up to 937,500 newly-issued shares
          to employees in Japan and employees of our non-U.S. subsidiaries; and

     .    under the U.S. program of the plan, STG Incentive Company L.L.C., a
          Delaware limited liability company organized by Gainway Enterprises
          Limited, Trueway Company Limited and Steve Ming-Jang Chang, has issued
          options directly to employees and directors of Trend U.S. to acquire
          up to 810,000 shares from STG Incentive Company L.L.C.

     The exercise price per share for the warrants and the options issued under
the 1999 incentive plan is the fair market value of the shares on the date on
which the exercise price was determined. We have issued the warrants in the form
of unsecured bonds with detachable warrants. Immediately following issuance of
the bonds, we repurchased the warrants and issued some of the warrants to our
Japanese employees and sold the remaining warrants to our subsidiaries for
issuance to employees outside of Japan and the United States. The terms of the
warrants issued under our 1999 incentive plan are substantially identical to
those of the warrants issued under the 1997 and 1998 incentive plans.

     Trend U.S. determines the allocation of and vesting for options. Options
are granted by STG Incentive Company L.L.C. at the direction of Trend U.S. Each
option gives the option holder the right to purchase one unit of 500 shares
during the four-year period from the date of grant. The options will not be
transferable other than by inheritance or under a domestic relations order by a
court. Upon exercise of an option, you will deposit the underlying shares into
the ADS facility and receive ADSs. The custodian will return shares underlying
options which have not been exercised as of the end of the option term to STG
Incentive Company L.L.C. for distribution to Trueway, Gainway and Mr. Chang.

     For additional information about the U.S. program, see "Plan of
Distribution" beginning on page 86.

                                       60
<PAGE>

     Warrant and Option Grants to Directors and Executive Officers

     The following table shows information about the warrants and options
granted to the directors and executive officers of Trend Micro which are
outstanding as of April 30, 2000.

<TABLE>
<CAPTION>
                            Expiration       Total Number of Shares
                            ----------       ----------------------
Name                           Date               Underlying             Aggregate Exercise Price (1)
- ----                           ----               ----------             ------------------------
                                                Warrants/Options
                                                ----------------
<S>                         <C>              <C>                         <C>
Andrew Kwok-To Lai           7/12/2003                51,000             $2,559,690

Eva Yi-Fen Chiang            7/12/2003                51,000             $2,559,690

Yoshitaka Kitao              7/22/2002                53,125                          (Yen) 340,000,000

Hiroyuki Nakanishi           7/22/2002                53,125                          (Yen) 340,000,000

Toshihiro Watanabe           7/22/2002                 8,593                          (Yen)  54,995,200

Directors and                7/22/2002 -
 Executive Officers as a     7/12/2003               216,843             $5,119,380   (Yen) 734,995,200
  group (10 persons)
</TABLE>

/(1)/ Yen figures represent aggregate yen-denominated exercise prices for
      warrants, and dollar figures represent aggregate dollar-denominated
      exercise prices for options.

                                       61
<PAGE>

                PRINCIPAL SHAREHOLDERS AND SELLING SHAREHOLDER

     The following table shows information known to us regarding the beneficial
ownership of our common stock as of March 31, 2000, by (1) each person known by
us to own more than 10% of the outstanding shares, (2) STG Incentive Company
L.L.C. and (3) all directors and executive officers as a group. As of March 31,
2000, there were 65,068,900 shares outstanding. To our knowledge, except as
otherwise stated, each entity named in the table below has sole voting and
investment power over the shares shown opposite the entity's name.

<TABLE>
<CAPTION>
                                                  Shares of common stock
                                                       beneficially               Number of shares        Shares of common stock
                                                     owned prior to                  offered              beneficially owned after
                                                       offering                 in this offering                offering
                                             -----------------------------   --------------------    ------------------------------
  Name                                          Number         Percentage            Number               Number        Percentage
- --------                                     --------------  -------------   --------------------    -------------  ---------------
<S>                                          <C>             <C>             <C>                     <C>            <C>
Trueway Company Limited (1)................     12,759,000        19.6                    --           12,759,000        19.6
  P.O. Box 3151, Roadtown,
  Tortola, British Virgin Islands
MLPFS Custody Account No. 2 (2)............      6,776,000        10.4                                  6,776,000        10.4
  South Tower, World Financial Center
  New York, NY 10080-0801
  U.S.A.
Gainway Enterprises Limited (3)............      6,597,000        10.1                    --            6,597,000        10.1
  P.O. Box 3151, Roadtown,
  Tortola, British Virgin Islands
STG Incentive Company L.L.C................        810,000 (4)     1.2               810,000                   --         1.2
  c/o The Corporation Trust Center
  1209 Orange Street
  Wilmington, Delaware 19801
  U.S.A.
All directors and executive officers as
  a group (10 persons).....................      4,266,000 (5)     6.6                    --            4,266,000         6.6
</TABLE>

_____________________

(1)  All of the shares of Trueway are beneficially owned by Yeh Min Yuen. None
     of Trend Micro's directors or executive officers have voting or investment
     power over the shares beneficially owned by Mr. Yeh. Trueway's share total
     reflects 157,000 shares transferred by Trueway to STG Incentive Company
     L.L.C. in July 1999 in connection with the U.S. program of the 1999
     incentive plan.

(2)  The shares held by the MLPFS Custody Account No. 2 include 1,353,000 shares
     beneficially owned by Eva Chiang. The shares held by the MLPFS Custody
     Account No. 2 also include shares beneficially owned by family members of
     Eva Chiang and her husband. Steve Chang and Eva Chiang disclaim beneficial
     ownership of the shares beneficially owned by these family members.

(3)  All of the shares of Gainway are beneficially owned by Liao Hsueh-Hsuan.
     None of Trend Micro's directors or executive officers have voting or
     investment power over the shares beneficially owned by Mr. Liao. Gainway's
     share total reflects 243,000 shares transferred by Gainway to STG Incentive
     Company L.L.C. in July 1999 in connection with the U.S. program.

(4)  STG Incentive Company L.L.C.'s pre-offering share total reflects 810,000
     shares transferred to STG Incentive Company L.L.C. by Trueway, Gainway and
     Mr. Chang in July 1999 in connection with the U.S. program of our 1999
     incentive plan.

(5)  The share total includes 1,353,000 shares held by the MLPFS Custody Account
     No. 2 that are beneficially owned by Eva Chiang. The share total excludes
     96,000 shares transferred by Steve Jang-Ming Chang to STG Incentive Company
     L.L.C. in July 1999 in connection with the U.S. program. For additional
     information regarding ownership of warrants, see "Management--Incentive
     Plans."

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             CERTAIN RELATIONSHIPS AND RELATED PARTY TRANSACTIONS

     Transactions with SOFTBANK

     In December 1996, we concluded a series of agreements with SOFTBANK
involving an investment by SOFTBANK in Trend Micro and the distribution by
SOFTBANK of our products in Japan.

     Stock Purchase. In December 1996, SOFTBANK purchased 18,900,000 shares from
Steve Chang, Eva Chiang and several of their family members for approximately
(Yen)555 per share, or an aggregate of (Yen)3.5 billion. At the time of the
investment, the purchased shares represented 35% of our outstanding shares. In
accordance with a price adjustment provision in the purchase agreement, SOFTBANK
paid an additional (Yen)5 billion ($44.2 million) upon our Japanese initial
public offering in August 1998. SOFTBANK sold 3,000,000 shares to an
unaffiliated third party in September 1998, 12,750,000 shares in a global
offering of our shares in July 1999, and the remaining 3,150,000 shares in March
2000. Until the purchase agreement was amended in June 1998 to delete a
provision providing for such meetings, senior representatives from the two
companies occasionally held management meetings to discuss operational and
management issues relating to our business. The purchase agreement is no longer
in effect. In addition, Mr. Yoshitaka Kitao and Mr. Hiroyuki Nakanishi, who are
members of our board of directors, are a SOFTBANK executive and a former
SOFTBANK employee, respectively. Also, three of our statutory auditors, Mr.
Akira Kajikawa, Mr. Katsuya Kawashima and Mr. Mitsuo Sano, are current or former
employees of SOFTBANK.

     Distribution.  We have an important distribution agreement with SOFTBANK,
our largest distributor in Japan as discussed under "Business--Sales and
Marketing--Japan."

     Acquisition of SOFTBANK bonds. Between October 1998 and December 1998,
Trend Micro purchased in the public market an aggregate of 12,000,000 units of
bonds issued by SOFTBANK, for a total purchase price of (Yen)1,200,826,000. Of
these bonds, 11,000,000 units had a maturity date of October 18, 1999 and a 2.3%
annual interest rate. Semi-annual interest payments under these bonds were made
on April 18 and October 18 of each year. The remaining 1,000,000 units have a
maturity date of October 18, 2000, and bear interest at the rate of 2.65% per
annum. Semi-annual interest payments under these bonds are also made on April 18
and October 18 of each year. We also currently own 17,000,000 units of SOFTBANK
bonds which we purchased for (Yen)1.7 billion in March 1999. These bonds are due
March 24, 2003 and bear 3% interest. Semi-annual interest payments under these
bonds are due March 24 and September 24 of each year. In each instance, we
purchased the SOFTBANK bonds at the then current fair market value of these
bonds and in brokered transactions.

     Issuance of Bonds to SOFTBANK in Connection with Incentive Plans. In
connection with the 1997 and 1998 incentive plans, we issued unsecured bonds
with detachable warrants to SOFTBANK in the following amounts: on October 17,
1997, (Yen)908.5 million; on April 15, 1998, (Yen)412.9 million; and on June 15,
1998, (Yen)196.6 million. We immediately fully redeemed the bonds on their dates
of issuance at their face value. We also repurchased all of the detachable
warrants upon issuance of each bond and immediately distributed such warrants,
at the fair market price on the date of issuance, to our and our subsidiaries'
participating employees.

     We issued approximately (Yen)6 billion worth of unsecured bonds with
detachable warrants to SOFTBANK, which may include affiliated companies, in
connection with the 1999 incentive plan.  These bonds remain outstanding.  We
have also repurchased the detachable warrants and distributed them, with an
exercise price equal to the fair market value of the underlying shares on the
date of issuance, to our and our non-U.S. subsidiaries' employees.  The bonds
will bear interest at the annual rate of 2.5%.

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     Investment in SoftTrend Capital. In December 1999, Trend Micro invested
(Yen)12.5 million (approximately $122,000) in SoftTrend Capital Corporation. As
of April 30, 2000, Trend Micro is a 20% shareholder of SoftTrend Capital.
SoftTrend Capital is indirectly owned by SOFTBANK, and acts as manager for the
SOFTBANK Internet Fund. Yoshitaka Kitao, who serves on the board of directors of
both Trend Micro and SOFTBANK, is president and chief executive officer of
SoftTrend Capital. Steve Ming-Jang Chang, Trend Micro's president and chief
executive officer, also became a board member of SoftTrend Capital upon Trend
Micro's investment in SoftTrend Capital. The SOFTBANK Internet Fund is a venture
capital fund established in July 1999 for the purpose of making investments in
internet-related companies. In December 1999, Trend Micro also made an
investment of (Yen)960 million (approximately $9.4 million) in the SOFTBANK
Internet Fund.

     Acquisition of Shares of USWeb. In May 1997, Trend Micro purchased common
stock, and warrants to purchase common stock, of USWeb/CKS in a private
placement for a total purchase price of $1.3 million. We sold 60,000 of these
shares in September 1999 and 25,000 shares in December 1999. Aggregate proceeds
from the sales of these shares were approximately $3.2 million. USWeb/CKS has
subsequently merged with Whittman-Hart. In March 2000 we received shares of the
merged entity, renamed marchFIRST, in exchange for the 104,170 shares of
USWeb/CKS common stock that we then owned. SOFTVEN No. 2 Investment Enterprise
Partnership, a venture capital fund which is managed by a wholly-owned
subsidiary of SOFTBANK, is a former shareholder of USWeb/CKS.

     Corporate Reorganization

     Trend Micro's current operations are a result of a series of transactions
in 1996 by which Trend Micro, which was initially a wholly-owned subsidiary of
Trend Taiwan, became the parent corporation of Trend Taiwan and each of the
international subsidiaries then owned by Trend Taiwan. In August 1996, Steve
Chang, Eva Chiang, several of their family members, Trueway and Gainway
purchased all of Trend Micro's then outstanding shares from Trend Taiwan for
(Yen)130,000,000, and Trend Micro purchased all of the then outstanding shares
of Trend U.S. and Trend Korea Inc. from Trend Taiwan for $640,000 and $70,000,
respectively. As a result of these transactions, these shareholders wholly owned
Trend Micro and Trend Taiwan. In October 1996, Trend Micro purchased all of the
then outstanding shares of Trend Taiwan from these shareholders for
NT$323,999,773, as a result of which Trend Taiwan became a majority-owned
subsidiary of Trend Micro.

     In preparation for its initial public offering in the Japanese over-the-
counter market in August 1998, Trend Micro effected a one-into-three stock split
in September 1997 and a one-into-ten stock split in May 1998. In July 1999,
Trend Micro effected a global offering of 12,750,000 shares including a
concurrent listing of 3,300,000 shares in the form of ADSs on The Nasdaq
National Market.

                        SHARES ELIGIBLE FOR FUTURE SALE

     Sales of a substantial number of shares into the public market following
the offering, whether on the Japanese over-the-counter market or into the U.S.
market by conversion of outstanding shares into ADSs, could cause the market
price of the shares and ADSs to fall.

     As of April 30, 2000, we have 65,096,142 shares issued and outstanding,
assuming exercise of all options and outstanding warrants. If warrants
outstanding at April 30, 2000 are exercised, we will have approximately
67,389,867 shares issued and outstanding. All of these shares are freely
tradable in the Japanese over-the-counter market. Of 65,096,142 shares issued
and outstanding,

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 . 3,300,000 shares in the form of ADSs sold in the U.S. and Canada in our global
  offering of shares and ADSs in July 1999 are freely tradable in the U.S. and
  are eligible for sale on The Nasdaq National Market, except for any American
  Depositary Shares acquired by an "affiliate" of Trend Micro, as defined in
  Rule 144 under the Securities Act;

 . 9,450,000 shares sold outside the U.S. and Canada in the Japanese and
  international portions of our global offering are freely tradable in the U.S.
  and, upon deposit with the depositary in exchange for ADSs, are eligible for
  sale on The Nasdaq National Market, except for any shares acquired by an
  "affiliate" of Trend Micro, as defined in Rule 144;

 . approximately 47,986,842 shares, including shares sold to the public in our
  initial public offering in Japan, will be eligible for sale in the U.S. in the
  form of ADSs immediately following the offering, and, in the case of shares
  held by "affiliates" of Trend Micro, as described in Rule 144, in compliance
  with the volume and manner of sale restrictions under Rule 144, or under
  another exemption from the registration requirements of the Securities Act;

 . approximately 3,549,300 shares have been issued upon exercise of warrants
  granted under our 1997 and 1998 incentive plans.  Of these shares, under Rule
  701 of the Securities Act, approximately 1,068,600 shares issued to U.S.
  employees will be tradable in the U.S. in compliance with the manner of sale
  restrictions under Rule 144 beginning 90 days after the date of this
  prospectus, approximately 1,963,800 shares issued to non-U.S. employees will
  be freely tradable in the U.S. and approximately 516,900 shares held by
  affiliates may be resold in compliance with the holding period, volume and
  manner of sale restrictions under Rule 144; and

 . the 810,000 shares covered by this prospectus will be eligible for sale
  immediately upon exercise of the options being granted under the U.S. program
  of the 1999 incentive plan.

     Approximately 1,284,000 shares are issuable upon exercise of warrants
granted under our 1997 and 1998 incentive plans. Assuming exercise of the
warrants, of these shares, under Rule 701 of the Securities Act,

     .    approximately 651,412 shares issued to U.S. employees will be tradable
          in the U.S. in compliance with the manner of sale restrictions under
          Rule 144 beginning 90 days after the date of this prospectus, and

     .    approximately 632,588 shares issuable to non-U.S. employees will be
          freely tradable in the U.S.

     Approximately 890,625 shares are issuable upon exercise of warrants granted
under our 1999 incentive plan.  Assuming exercise of these warrants, the shares
issued will be eligible for sale in the U.S. in the form of ADSs upon such
issuance, and, in the case of shares held by "affiliates" of Trend Micro, as
described in Rule 144, in compliance with the holding period, volume and manner
of sale restrictions under Rule 144.

     In general, under Rule 144 as currently in effect, a person, or persons
whose shares are aggregated, including an affiliate, who has beneficially owned
restricted shares for at least one year is entitled to sell, within any three-
month period commencing 90 days after the effective date of this offering, a
number of shares that does not exceed the greater of:

     (1)  1% of the then outstanding shares, which is equal to approximately
          650,961 shares based on the shares outstanding as of April 30, 2000;
          or

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<PAGE>

     (2)  the average weekly trading volume in our shares during the four
          calendar weeks preceding such sale.

     Sales under Rule 144 must also comply with restrictions regarding the
manner of sale, notice requirements and availability of current public
information about Trend Micro, and the seller must file a Form 144 regarding
these sales.  A person who is not deemed to have been an affiliate of Trend
Micro at any time during the 90 days preceding a sale and who has beneficially
owned the shares proposed to be sold for at least two years, would be entitled
to sell such shares under Rule 144(k) without regard to the requirements
described above.

     In addition, any employee, officer or director of or consultant to Trend
Micro who purchases his or her shares upon exercise of warrants or options
issued to them under a written compensatory plan or contract may be entitled to
rely on the resale provisions of Rule 701 under the Securities Act. Rule 701
permits affiliates to sell their Rule 701 shares under Rule 144 without
complying with the holding period requirements of Rule 144. Rule 701 further
provides that persons other than affiliates may sell such shares in reliance on
Rule 144 without having to comply with the public information, volume limitation
or notice provisions of Rule 144. In both cases, a holder of Rule 701 shares is
required to wait until 90 days after the date of this prospectus before selling
such shares.

                         DESCRIPTION OF CAPITAL STOCK

     The following is a summary of material information concerning the shares,
including summaries of material provisions of our articles of incorporation and
share handling regulations, and of the Japanese Commercial Code and related
legislation. These summaries should be read together with the articles and the
share handling regulations which have been filed as exhibits to the registration
statement of which this prospectus is a part.

General

     Our authorized share capital as of April 30, 2000 is 250,000,000 shares, of
which 65,096,142 shares with par value of (Yen)50 per share were issued and
outstanding. Under the Commercial Code, shares must be registered and are
transferable by delivery of share certificates. In order to assert shareholders'
rights against us, a shareholder must have its name and address registered on
our register of shareholders, in accordance with our share handling regulations.
The registered beneficial holder of deposited shares underlying the ADSs is the
depositary for the ADSs. Accordingly, holders of ADSs will not be able to assert
shareholders' rights.

     A holder of shares may choose, at its discretion, to participate in the
central clearing system for share certificates under the Law Concerning Central
Clearing of Share Certificates and Other Securities of Japan. Participating
shareholders must deposit certificates representing all of the shares to be
included in this clearing system with Japan Securities Depository Center. If a
holder is not a participating institution in the Securities Center, it must
participate through a participating institution, such as a securities company or
bank having a clearing account with the Securities Center. All shares deposited
with the center will be registered in the name of the center on our register of
shareholders. Each participating shareholder will in turn be registered on our
register of beneficial shareholders and be treated in the same way as
shareholders registered on our register of shareholders. For the purpose of
transferring deposited shares, delivery of share certificates is not required.
Entry of the share transfer in the books maintained by the Securities Center for
participating institutions, or in the book maintained by a participating
institution for its customers, has the same effect as delivery of share
certificates. The Securities Center system is intended to reduce paperwork
required in connection with transfers of shares. Beneficial owners may at any
time withdraw their shares from deposit and receive share certificates.

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<PAGE>

Dividends

     Under our articles, our financial accounts will be closed on December 31 of
each year and dividends, if any, will be paid to shareholders of record at
December 31. In addition to year-end dividends, the board of directors may by
resolution declare an interim cash dividend to shareholders of record as of June
30 of each year. Under the Commercial Code, however, we cannot declare or pay
dividends unless specified financial criteria are met based on the amount of our
stated capital and legal reserves. For information as to Japanese taxes on
dividends, see "Tax Considerations--Japanese Taxation."

Japanese Unit Share System

     In accordance with the requirements of the Commercial Code, our articles of
incorporation provide that 500 shares constitute one "unit."

     Transferability of Shares Representing Less Than One Unit. Under the
Commercial Code and the Deposit Agreement, holders of ADSs will be able to
surrender ADSs and withdraw the underlying shares from deposit only in whole
unit lots of one unit or larger. A holder who owns ADRs evidencing less than
5,000 ADSs will indirectly own less than a whole unit. Such a holder will not be
able to dispose of its shares in lots of less than one unit and will not have
access to the Japanese market through surrender of their ADSs and withdrawal and
sale in Japan of the underlying shares. The Japanese unit share system does not
affect the transferability of ADSs, which may be transferred in lots of any
size.

     Right of a Holder of Shares Representing Less Than One Unit to Require
Trend Micro to Purchase Such Shares. A holder of shares representing less than
one unit may at any time require Trend Micro to purchase such shares. Such
shares will be purchased at their last reported sale price on the Japanese over-
the-counter market on the day a request pertaining to such purchase is delivered
to our transfer agent or, if no sales take place on that day, the price at which
the next sale of shares is effected in the Japanese over-the-counter market,
less applicable brokerage commissions. However, because holders of ADSs
representing less than one unit are not able to withdraw the underlying shares
from deposit, such holders will not be able to exercise this right as a
practical matter.

     Other Rights of a Holder of Shares Representing Less Than One Unit.  A
holder of shares representing less than one unit has the following rights:

     .  to receive dividends (including interim dividends);

     .  to receive shares and/or cash by way of a stock split, upon
        consolidation or subdivision of shares or upon a capital decrease or
        merger;

     .  to be allotted rights to subscribe for new shares and other securities
        when such rights are granted to shareholders;

     .  to participate in any distribution of surplus assets upon the
        liquidation of Trend Micro; and

     .  to require us to issue replacement certificates for lost, stolen or
        destroyed share certificates.

     A shareholder who owns shares representing less than one unit will not be
able to exercise any other rights, including voting rights, the right to
institute derivative actions and the right to examine our accounting books and
records.

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     Voting Rights of a Holder of Shares Representing Less Than One Unit. A
holder of shares representing less than one unit cannot exercise any voting
rights pertaining to such shares. In calculating the quorum for various voting
purposes, the aggregate number of shares representing less than one unit will be
excluded from the number of outstanding shares. A holder of shares representing
one or more whole units will have one vote for each share held, except as stated
in "--Voting Rights" below.

     Consolidation by Operation of Law of Shares Constituting One Unit into One
Share. The Japanese unit share system was intended to be an interim measure to
encourage companies to issue shares denominated in larger amounts. The
Commercial Code provides that, on a date to be specified by separate
legislation, shares comprising one unit will be consolidated into one share. We
do not currently know when a bill specifying such date will be submitted to the
Japanese Diet. The Japanese Diet is the highest legislative body within the
Japanese governmental system and performs a function analogous to that of the
U.S. Congress. When this consolidation happens, a holder of a fractional share,
equal to one-hundredth of one share or any integral multiple of one-hundredth
which results from the consolidation, will be registered as the holder of the
fraction in our register of fractional shares. A holder of any fraction
representing less than one-hundredth of one share will be entitled to only
limited rights, such as the right to receive a cash payment or a distribution of
shares by way of a stock split. The registered holders of fractional shares may
request that we issue share certificates, but such fractional shares will not
have voting rights. In addition, unless the Articles are amended to provide
otherwise, the rights of the fractional shareholders will be limited and will
not include, for example, the right to receive dividends.

Ordinary General Meeting of Shareholders

     We normally hold our ordinary general meeting of shareholders in March of
each year in Tokyo, Japan. In addition, we may hold an extraordinary general
meeting of shareholders whenever necessary by giving at least two weeks' advance
notice. Under the Commercial Code, notice of any shareholders' meeting must be
given to each shareholder having voting rights or, in the case of a non-resident
shareholder, to his resident proxy or mailing address in Japan in accordance
with our share handling regulations, at least two weeks prior to the date of the
meeting.

     Any shareholder or group of shareholders holding at least 300 units of
shares, or 1% of the total outstanding shares, for a continuous period of six
months or longer may propose a matter for consideration at a shareholders
meeting by submitting a written request to the board of directors at least six
weeks before such meeting.

Voting Rights

     A shareholder is generally entitled to one vote per share except in those
instances described in this paragraph and under "--Japanese Unit Share System"
above. In general, under the Commercial Code, a resolution can be adopted at an
ordinary meeting of shareholders by a majority of the shares having voting
rights represented at the meeting. The Commercial Code and our articles of
incorporation require a quorum for the election of directors and statutory
auditors of not less than one-third of the total number of outstanding shares
having voting rights. Our shareholders are not entitled to cumulative voting in
the election of directors. A corporate shareholder whose outstanding shares are
in turn more than one-quarter directly or indirectly owned by Trend Micro does
not have voting rights. Shareholders may exercise their voting rights through
proxies, provided that such proxies are also shareholders who have voting
rights.

     The Commercial Code provides that a quorum of the majority of outstanding
shares with voting rights must be present at a shareholders' meeting to approve
any material corporate actions such as:

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     .  amendment of the articles of incorporation;

     .  the removal of a director or statutory auditor;

     .  a dissolution, merger or consolidation; and

     .  the transfer of the whole or an important part of our business.

At least two-thirds of the shares having voting rights represented at the
meeting must approve such actions.

     The voting rights of holders of ADSs are exercised by the depositary based
on instructions from such holders. An agent of the depositary is the record
holder of the underlying shares.

Subscription Rights

     Holders of shares have no preemptive rights under our articles of
incorporation. Under the Commercial Code, the board of directors may, however,
determine that shareholders be given subscription rights in connection with a
particular issue of new shares. In this case, such rights must be given on
uniform terms to all shareholders as of a specified record date by at least two
weeks' prior public notice to shareholders of the record date. Public or
individual notice must be given to each of these shareholders at least two weeks
prior to the date of expiration of the subscription rights.

     Rights to subscribe for new shares may be transferable or nontransferable
as determined by the board of directors. If subscription rights are not
transferable, a purported transfer by a shareholder who is not resident in Japan
will be enforceable against Trend Micro and third parties only with our prior
written consent.

Liquidation Rights

     Upon a liquidation of Trend Micro, the assets remaining after payment of
all debts, liquidation expenses and taxes will be distributed among the
shareholders in proportion to the number of shares they own.

Liability to Further Calls or Assessments

     All of our currently outstanding shares, including shares represented by
the ADSs, are fully paid and nonassessable.

Transfer Agent

     The Toyo Trust and Banking Company, Limited is the transfer agent for the
Common Stock.  Toyo Trust's office is located at 4-3, Marunouchi 1-chome,
Chiyoda-ku, Tokyo, 100-0005 Japan.  Toyo Trust maintains our register of
shareholders and records transfers of record ownership upon presentation of
share certificates.

Repurchase by Trend Micro of Shares

     In addition to repurchases of shares constituting less than one unit, our
articles of incorporation permit us to repurchase up to 4.8 million of our
shares.

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                  DESCRIPTION OF AMERICAN DEPOSITARY RECEIPTS

     The following is a summary of the material provisions of the deposit
agreement between Trend Micro, The Bank of New York as depositary, registered
holders of outstanding ADSs and the owners of a beneficial interest in ADSs
evidenced by ADRs.

     You should read this summary together with the Deposit Agreement and the
ADR. You can inspect a copy of the Deposit Agreement at the Corporate Trust
Office of the depositary, currently located at 101 Barclay Street, New York, New
York 10286, and at the principal offices of the custodian, which will act as
agent of the depositary, currently the Kabutocho Branch of The Fuji Bank,
Limited, at 6-7, Nihonbashi-Kabutocho, Chuo-ku, Tokyo 103-0026, Japan.

American Depositary Receipts

     The Bank of New York issues the ADRs. The ownership interest in each share
is represented by ten ADRs. The shares, or the right to receive shares, will be
deposited by us with the custodian. Each ADR will also represent securities,
cash or other property deposited with The Bank of New York but not distributed
to ADR holders.

     You may hold ADRs either directly or indirectly through your broker or
other financial institution. If you hold ADRs directly, you are an ADR holder.
This description assumes you hold your ADRs directly. If you hold the ADRs
indirectly, you must rely on the procedures of your broker or other financial
institution to assert the rights of ADR holders described in this section. You
should consult with your broker or financial institution to find out what those
procedures are.

     Because The Bank of New York will actually be the legal owner of the
shares, you must rely on it to exercise the rights of a shareholder. The
obligations of The Bank of New York are set out in a deposit agreement among us,
The Bank of New York and you, as an ADR holder. The deposit agreement and the
ADRs are generally governed by New York law.

Share Dividends And Other Distributions

     The Bank of New York has agreed to pay to you the cash dividends or other
distributions it or the custodian receives on shares or other deposited
securities after deducting its fees and expenses. You will receive these
distributions in proportion to the number of shares your ADRs represent.

     Cash. The Bank of New York will convert any cash dividend or other cash
distribution we pay on the shares into U.S. dollars, if it can do so on a
reasonable basis and can transfer the U.S. dollars to the United States. If that
is not possible or if any approval from the Japanese government is needed and
cannot be obtained, the deposit agreement allows The Bank of New York to
distribute the yen only to those ADR holders to whom it is possible to do so. It
will hold the yen it cannot convert for the account of the ADR holders who have
not been paid. It will not invest the yen and it will not be liable for
interest.

     Before making a distribution, any withholding taxes that must be paid under
Japanese law will be deducted.  See "Tax Considerations--United States Federal
Income Taxation--Taxation of Dividends Distributed on the Shares or ADSs."  The
Bank of New York will distribute only whole U.S. dollars and cents and will
round fractional cents to the nearest whole cent.  If the exchange rates
fluctuate during a time when The Bank of New York cannot convert the Japanese
currency, you may lose some or all of the value of the distribution.

     Shares.  The Bank of New York may distribute new ADRs representing any
shares we may distribute as a dividend or free distribution, if Trend Micro
furnishes it promptly with satisfactory

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evidence that it is legal to do so. The Bank of New York will only distribute
whole ADRs. It will sell shares which would require it to issue a fractional ADR
and distribute the net proceeds in the same way as it does with cash. If The
Bank of New York does not distribute additional ADRs, each ADR will also
represent the new shares.

     Rights to receive additional shares.  If we offer holders of our ordinary
shares any rights to subscribe for additional shares or any other rights, The
Bank of New York may make these rights available to you.  We must first instruct
The Bank of New York to do so and furnish it with satisfactory evidence that it
is legal to do so.  If we do not furnish this evidence and/or give these
instructions, and The Bank of New York decides it is practical to sell the
rights, The Bank of New York will sell the rights and distribute the proceeds,
in the same way as it does with cash. The Bank of New York may allow rights that
are not distributed or sold to lapse. In that case, you will receive no value
for them.

     If The Bank of New York makes rights available to you, it will exercise the
rights and purchase the shares on your behalf. The Bank of New York will then
deposit the shares and issue ADRs to you. It will only exercise rights if you
pay it the exercise price and any other charges the rights require you to pay.

     U.S. securities laws may restrict the sale, deposit, cancellation and
transfer of the ADRs issued after exercise of rights. For example, you may not
be able to trade the ADRs freely in the United States. In this case, The Bank of
New York may issue the ADRs under a separate restricted deposit agreement which
will contain the same provisions as the deposit agreement, except for the
changes needed to put the restrictions in place.

     Other Distributions.  The Bank of New York will send to you anything else
we distribute on deposited securities by any means it thinks is legal, fair and
practical. If it cannot make the distribution in that way, The Bank of New York
has a choice. It may decide to sell what we distributed and distribute the net
proceeds in the same way as it does with cash or it may decide to hold what we
distributed, in which case the ADRs will also represent the newly distributed
property.

     The Bank of New York is not responsible if it decides that it is unlawful
or impractical to make a distribution available to any ADR holders. We have no
obligation to register ADRs, shares, rights or other securities under the
Securities Act. We also have no obligation to take any other action to permit
the distribution of ADRs, shares, rights or anything else to ADR holders. This
means that you may not receive the distribution we make on our shares or any
value for them if it is illegal or impractical for us to make them available to
you.

Deposit, Withdrawal and Cancellation

     The Bank of New York will issue ADRs if you or your broker deposit shares
or evidence of rights to receive shares with the custodian. Upon payment of its
fees and expenses and of any taxes or charges, such as stamp taxes or stock
transfer taxes or fees, The Bank of New York will register the appropriate
number of ADRs in the names you request and will deliver the ADRs at its office
to the persons you request.

     You may turn in your ADRs at The Bank of New York's office.  Upon payment
of its fees and expenses and of any taxes or charges, such as stamp taxes or
stock transfer taxes or fees, The Bank of New York will deliver (1) the
deliverable portion of the underlying shares to an account designated by you and
(2) the deliverable portion of any other deposited securities underlying the ADR
at the office of the custodian.  Or, at your request, risk and expense, The Bank
of New York will deliver the deliverable portion of the deposited securities at
its office.  The "deliverable portion" of the ADSs will be the maximum number of
whole units of shares represented by the ADSs being

                                       71
<PAGE>

turned in by you at one time. If you turn in ADSs that do not constitute an
integral multiple of 5,000 ADSs, The Bank of New York will deliver to you the
deliverable portion of the ADSs and an ADR representing the remaining amount.

Voting Rights

     You may instruct The Bank of New York to vote the shares underlying your
ADRs but only if we ask The Bank of New York to ask for your instructions.
Otherwise, you won't be able to exercise your right to vote unless you withdraw
the shares. However, you may not know about the meeting enough in advance to
withdraw the shares.

     If we ask for your instructions, The Bank of New York will notify you of
the upcoming vote and arrange to deliver Trend Micro's voting materials to you.
The materials will (1) describe the matters to be voted on and (2) explain how
you, on a specified date, may instruct The Bank of New York to vote the shares
or other deposited securities underlying your ADRs as you direct. For
instructions to be valid, The Bank of New York must receive them on or before
the date specified. The Bank of New York will try, as far as practical, in
compliance with Japanese law and the provisions of our articles of
incorporation, to vote or to have its agents vote the shares or other deposited
securities as you instruct. The Bank of New York will only vote or attempt to
vote as you instruct.

     We cannot assure you that you will receive the voting materials in time to
ensure that you can instruct The Bank of New York to vote your shares. In
addition, The Bank of New York and its agents are not responsible for failing to
carry out voting instructions or for the manner of carrying out voting
instructions. This means that you may not be able to exercise your right to vote
and there may be nothing you can do if your shares are not voted as you
requested.

Fees and Expenses

<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------------------------------------------
ADR holders must pay:                                        For:
- -----------------------------------------------------------------------------------------------------------------------
<S>                                                          <C>
$5.00 (or less) per 100 ADRs                                 Each issuance of an ADR, including as a result of a
                                                             distribution of shares or rights or other
                                                             property

                                                             Each cancellation of an ADR, including if the agreement
                                                             terminates
- -----------------------------------------------------------------------------------------------------------------------
$.02 (or less) per ADR                                       Any cash payment
- -----------------------------------------------------------------------------------------------------------------------
Registration or Transfer Fees                                Transfer and registration of shares on the share register
                                                             of the Foreign Registrar from your name to the name of The
                                                             Bank of New York or its agent when you deposit or withdraw
                                                             shares
- -----------------------------------------------------------------------------------------------------------------------
Expenses of The Bank of New York                             Conversion of Japanese yen to U.S. dollars

                                                             Cable, telex and facsimile transmission expenses
- -----------------------------------------------------------------------------------------------------------------------
Taxes and other governmental charges                         As necessary
The Bank of New York or the Custodian have to pay on any
ADR or share underlying an ADR, for example, stock
transfer taxes, stamp duty or withholding taxes
- -----------------------------------------------------------------------------------------------------------------------
</TABLE>

                                       72
<PAGE>

Payment of Taxes

     You will be responsible for any taxes or other governmental charges payable
on your ADRs or on the deposited securities underlying your ADRs. The Bank of
New York may refuse to transfer your ADRs or allow you to withdraw the deposited
securities underlying your ADRs until such taxes or other charges are paid. It
may apply payments owed to you or sell deposited securities underlying your ADRs
to pay any taxes owed and you will remain liable for any deficiency. If it sells
deposited securities, it will, if appropriate, reduce the number of ADRs to
reflect the sale and pay to you any proceeds, or send to you any property,
remaining after it has paid the taxes.

Reclassifications, Recapitalizations and Mergers

<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------------------------------------------
If we:                                                           Then:
- --------------------------------------------------------------------------------------------------------------------------
<S>                                                              <C>
 .  Change the nominal or par value of our shares                 The cash, shares or other securities received by The Bank
                                                                 of New York will become deposited securities.

 .  Reclassify, split up or consolidate any of the                Each ADR will automatically represent its equal share of
   deposited securities                                          the new deposited securities.

                                                                 The Bank of New York may, and will if we ask it to,
 .  Distribute securities on the shares that are                  distribute some or all of the cash, shares or other
   not distributed to you                                        securities it received. It may also issue new ADRs or
                                                                 ask you to surrender your outstanding ADRs in exchange
 .  Recapitalize, reorganize, merge,                              for new ADRs, identifying the new deposited securities.
   liquidate, sell all or substantially all of
   our assets, or take any similar action

- --------------------------------------------------------------------------------------------------------------------------
</TABLE>

Amendment and Termination

     We may agree with The Bank of New York to amend the deposit agreement and
the ADRs without your consent for any reason. If the amendment will cause any of
the following results, the amendment will become effective 30 days after The
Bank of New York notifies you of the amendment:

 .    adds or increases fees or charges, except for

          .    taxes and other government charges;
          .    registration fees;
          .    cable, telex or facsimile transmission costs; or
          .    delivery costs or other such expenses; or
          .    prejudices an important right of ADR holders.

At the time an amendment becomes effective, you are considered, by continuing to
hold your ADR, to agree to the amendment and to be bound by the ADRs and the
deposit agreement as amended.

     The Bank of New York will terminate the deposit agreement if we ask it to
do so. The Bank of New York may also terminate the deposit agreement if The Bank
of New York has told us that it would like to resign and we have not appointed a
new depositary bank within 90 days. In both cases, The Bank of New York must
notify you at least 30 days before termination.

     After termination, The Bank of New York and its agents will be required to
do only the following under the deposit agreement:

     .    advise you that the deposit agreement is terminated, and

                                       73
<PAGE>

     .    collect distributions on the deposited securities and deliver the
          deliverable portion of shares and other deposited securities upon
          cancellation of ADRs.

Six months after termination, The Bank of New York will, if practical, sell any
remaining deposited securities by public or private sale. After that, The Bank
of New York will hold the proceeds of the sale, as well as any other cash it is
holding under the deposit agreement for the pro rata benefit of the ADR holders
that have not surrendered their ADRs or are unable to surrender their ADRs
because they represent less than a unit of shares. It will not invest the money
and will have no liability for interest. The Bank of New York's only obligations
will be to account for the proceeds of the sale and other cash. After
termination our only obligations will be an indemnification obligation and our
obligation to pay specified amounts to The Bank of New York.

Limitations on Obligations and Liability to ADR Holders

     The deposit agreement expressly limits our obligations and the obligations
of The Bank of New York, and it limits our liability and the liability of The
Bank of New York. We and The Bank of New York:

     .    are only obligated to take the actions specifically provided for in
          the deposit agreement without negligence or bad faith;

     .    are not liable if either is prevented or delayed by law or
          circumstances beyond their control from performing their obligations
          under the deposit agreement;

     .    are not liable if either exercises discretion permitted under the
          deposit agreement;

     .    have no obligation to become involved in a lawsuit or other proceeding
          related to the ADRs or the deposit agreement on your behalf or on
          behalf of any other party; and

     .    may rely upon any documents they believe in good faith to be genuine
          and to have been signed or presented by the proper party.

     In the deposit agreement, we and The Bank of New York agree to indemnify
each other under designated circumstances.

Requirements for Depositary Actions

     Before The Bank of New York will issue or register transfer of an ADR, make
a distribution on an ADR, or process a withdrawal of shares, The Bank of New
York may require:

     .    payment of stock transfer or other taxes or other governmental charges
          and transfer or registration fees charged by third parties for the
          transfer of any shares or other deposited securities;

     .    production of satisfactory proof of the identity and genuineness of
          any signature or other information it deems necessary; and

     .    compliance with regulations it may establish, from time to time,
          consistent with the deposit agreement, including presentation of
          transfer documents.

     The Bank of New York may refuse to deliver, transfer, or register transfers
of ADRs generally when our books or the books of The Bank of New York are
closed, or at any time if The Bank of New York or we think it advisable to do
so.

                                       74
<PAGE>

     You have the right to cancel your ADRs and withdraw the underlying shares
at any time except:

     .    when temporary delays arise because: (1) The Bank of New York or we
          have closed its or our transfer books; (2) the transfer of shares is
          blocked to permit voting at a shareholders' meeting; or (3) we are
          paying a dividend on the shares;

     .    when you or other ADR holders seeking to withdraw shares owe money to
          pay fees, taxes and similar charges; or

     .    when it is necessary to prohibit withdrawals in order to comply with
          any laws or governmental regulations that apply to ADRs or to the
          withdrawal of shares or other deposited securities. This includes
          compliance with the unit sales rules under the Japanese Commercial
          Code.

     This right of withdrawal may not be limited by any other provision of the
     deposit agreement.

Pre-Release of ADRs

     In compliance with the provisions of the deposit agreement, The Bank of New
York may issue ADRs before deposit of the underlying shares. This is called a
pre-release of the ADR. The Bank of New York may also deliver shares upon
cancellation of pre-released ADRs, even if the ADRs are cancelled before the
pre-release transaction has been closed out. A pre-release is closed out as soon
as the underlying shares are delivered to The Bank of New York. The Bank of New
York may receive ADRs instead of shares to close out a pre-release. The Bank of
New York may pre-release ADRs only under the following conditions:

     .    before or at the time of the pre-release, the person to whom the pre-
          release is being made must represent to The Bank of New York in
          writing that it or its customer owns the shares or ADRs to be
          deposited;

     .    the pre-release must be fully collateralized with cash or other
          collateral that The Bank of New York considers appropriate; and

     .    The Bank of New York must be able to close out the pre-release on not
          more than five business days' notice.

In addition, The Bank of New York will limit the number of ADRs that may be
outstanding at any time as a result of pre-release to 30% of the total shares
deposited, although The Bank of New York may disregard the limit from time to
time, if it thinks it is appropriate to do so.

                              TAX CONSIDERATIONS

     The following is a general discussion of material Japanese and United
States federal income tax consequences of the ownership of shares or ADSs by
U.S. holders, as defined below. The summary is not a complete analysis or
description of all potential tax consequences to U.S. holders. It does not
address all tax considerations that may be relevant to all categories of
potential purchasers, such as

     .    U.S. holders who are broker-dealers or who own, directly or
          indirectly, 10% or more of the outstanding shares;

                                       75
<PAGE>

     .    U.S. holders holding the shares or ADSs as a hedge or as part of a
          hedging, straddle or conversion transaction; and

     .    Some U.S. holders including:

          .    insurance companies;

          .    tax-exempt organizations;

          .    financial institutions;

          .    persons paying alternative minimum tax; and

          .    persons having a functional currency other than the U.S. dollar.

     These persons may need to comply with special rules not discussed below.

     The summary deals only with holders who hold the shares or ADSs as capital
assets. In addition, this summary is based on the representations of the
depositary and the assumption that each obligation in the deposit agreement
referred to in "Description of American Depositary Receipts," and any related
agreement, will be performed in accordance with its terms.

     The summary of material U.S. federal income tax consequences, to the extent
that it constitutes matters of U.S. law, summaries of U.S. legal matters or U.S.
legal conclusions, is the opinion of Morrison & Foerster LLP, United States
counsel for Trend Micro. The summary of material Japanese tax consequences, to
the extent that it constitutes matters of Japanese law, summaries of Japanese
legal matters or Japanese legal conclusions, is the opinion of Mitsui, Yasuda,
Wani & Maeda, Japanese counsel for Trend Micro. Morrison & Foerster LLP has not
opined as to whether Trend Micro is or will become either a "foreign personal
holding company" or a "passive foreign investment company" for U.S. tax purposes
because such determinations are inherently factual in nature.

     The following summary is based on:

     .    the Japan - U.S. tax treaty;

     .    current Japanese tax law;

     .    the current United States Internal Revenue Code; and

     .    current interpretations of these laws by Japanese and United States
          taxation authorities and courts.

     The treaty, the laws, or administrative or judicial interpretation of the
treaty or the laws may change, and the changes may have retroactive effect.

     This discussion does not consider the effect of any state, local or
national tax laws other than U.S. federal income tax or Japanese tax laws that
may be applicable to a purchaser of shares or ADSs. We urge you to consult your
tax advisors regarding the United States federal, state and local and the
Japanese and other tax consequences of owning and disposing of shares and ADSs.

                                       76
<PAGE>

     As used in this section of the prospectus, the term "U.S. holder" means a
beneficial owner of shares or ADSs that is:

     .    a citizen or resident of the United States for U.S. federal income tax
          purposes;

     .    a corporation or other entity created or organized under the laws of
          the United States or any political subdivision of the United States;

     .    an estate, the income of which is includable in gross income for
          United States federal income tax purposes regardless of its source;

     .    a trust, if a court within the United States is able to exercise
          primary jurisdiction over the administration of the trust and one or
          more U.S. persons has the authority to control all substantial
          decisions of the trust; or

     .    a trust that has a valid election in effect under U.S. treasury
          regulations to be treated as a United States person.

     In general, and taking into account the earlier assumptions, for United
States federal income and Japanese tax purposes, owners of ADRs evidencing ADSs
will be treated as the owners of the shares represented by such ADSs, and no
United States federal income tax or Japanese tax will be payable on exchanges of
shares for ADSs, and ADSs for shares.

Japanese Taxation

     The following summary describes the principal Japanese tax consequences
relating to an investment in Trend Micro shares or ADSs. This summary applies
only to persons or entities which are non-residents of Japan and to non-Japanese
corporations without a permanent establishment in Japan to which the relevant
income is attributable.

     Generally, Japanese withholding tax will apply to dividends paid by Trend
Micro to a non-resident of Japan or a non-Japanese corporation. In general, no
Japanese tax is payable on stock splits. However, if Trend Micro transfers a
part of its retained earnings or legal reserve to stated capital, whether in
connection with stock splits or otherwise, the transfer will be treated as a
dividend payment for Japanese tax purposes, even though no payment is
distributed to shareholders. In such case, Japanese income tax will be payable.

     Under the Japan-U.S. tax treaty, as currently in force, the maximum rate of
Japanese withholding tax which may be imposed on dividends paid to a United
States resident or corporation not having a "permanent establishment," which is
generally a fixed place of business for industrial or commercial activity, in
Japan is limited to:

     (1)  15% of the gross amount actually distributed; or

     (2)  if the recipient is a corporation, 10% of the gross amount actually
          distributed, if

           (a)   during the part of the paying corporation's taxable year which
                 precedes the date of payment of the dividend and during the
                 whole of its prior taxable year if any, at least 10% of the
                 voting shares of the paying corporation were owned by the
                 recipient corporation, and

                                       77
<PAGE>

           (b)   not more than 25% of the gross income of the paying corporation
                 for such prior taxable year, if any, consists of interest or
                 dividends as defined in the treaty.

     For purposes of the Japan-U.S. tax treaty and Japanese tax law, U.S.
holders of ADRs will be treated as the owners of the shares underlying the ADSs
evidenced by the ADRs.

     In the absence of any applicable tax treaty, convention or agreement
reducing the maximum rate of withholding tax, the rate of Japanese withholding
tax applicable to dividends paid by Japanese corporations to a non-resident or
non-Japanese corporation is 20%. Japan has entered into income tax treaties,
conventions or agreements, whereby the 20% withholding tax rate is reduced
generally to 15% for portfolio investors. In addition to the United States,
countries with which Japan has concluded such treaties, conventions or
agreements include Australia, Belgium, Canada, Denmark, Finland, France,
Germany, Ireland, Italy, Luxembourg, The Netherlands, New Zealand, Norway,
Singapore, Spain, Sweden, Switzerland and the United Kingdom.

     You must file an application for reduced withholding with the Japanese tax
authorities to claim the benefits of the reduced withholding rate on dividends
under the Japan - U.S. tax treaty. The application must be filed on or before
the day before the dividend is paid. If you hold ADSs, two application forms
must be filed through the depositary, one form before the dividend payment and
the other within eight months after Trend Micro's fiscal year in which the
dividend is paid. To claim the reduced rate, you will need to file proof of:

     .    taxpayer status;

     .    residence; and

     .    beneficial ownership.

     The depositary may also require you to provide other information. If you do
not submit an application for reduced withholding before a dividend is paid, you
may file a claim for refund of the excess tax with the Japanese tax authorities.

     You will not have to pay any Japanese tax on a sale of Trend Micro shares
or ADSs. If you make a gift of Trend Micro shares or die holding Trend Micro
shares, a person who receives the shares as a gift or inherits the shares may
have to pay Japanese gift or inheritance tax.

United States Federal Income Taxation

     U.S. Federal Tax Consequences of Options

     The following summarizes only the U.S. federal income tax consequences of
the options granted under the U.S. program of the 1999 incentive plan. State and
local tax consequences may differ.

     The grant of a nonqualified stock option under the U.S. program of the 1999
incentive plan will not result in any federal income tax consequences to the
optionee, to Trend Micro or to Trend U.S. Upon exercise of a nonqualified stock
option, the optionee is subject to income taxes at the rate applicable to
ordinary compensation income on the difference between the option price and the
fair market value of the shares on the date of exercise. This income is subject
to withholding for federal and state income and employment tax purposes, and
Trend U.S. may withhold such amounts from other compensation of the optionee, or
may require the optionee to pay to Trend U.S. an amount

                                       78
<PAGE>

sufficient to satisfy the withholding obligation. Trend U.S. is entitled to an
income tax deduction in the amount of the income recognized by the optionee.

     Any gain or loss on the optionee's subsequent disposition of the shares
will be taxable as short-term or long-term capital gain or loss, depending on
whether the shares are held for more than one year following exercise. The
maximum marginal rate at which long-term capital gains are taxed is 20%. Trend
U.S. does not receive an income tax deduction for any such gain recognized by
the shareholder.

     Taxation of Dividends Distributed on the Shares or ADSs

     Distributions on Trend Micro shares or ADSs, including the amount of any
Japanese tax withheld from the distribution, will be taxable at ordinary income
rates as a dividend to a U.S. holder if paid out of Trend Micro's current or
accumulated earnings and profits as determined under U.S. tax principles.
Dividends will be foreign source income for U.S. tax purposes, and will not be
eligible for the dividends-received deduction. Dividends paid on shares will be
taxable when received by the U.S. holder. Dividends paid on ADSs will be taxable
when received by the depositary.

     The amount of any distribution of property other than cash will be the fair
market value of the property on the distribution date.

     The amount of any cash distribution paid in Japanese yen will equal the
U.S. dollar value of the Japanese yen at the spot yen/dollar rate on the date of
receipt by the U.S. holder, in the case of shares, or the depositary, in the
case of the ADSs. This is the case regardless of whether a U.S. holder converts
the payments into U.S. dollars. If the Japanese yen received as a dividend is
not converted into U.S. dollars on the date of receipt, a U.S. holder will have
a basis in the Japanese yen equal to its U.S. dollar value on the date of
receipt. Gain or loss, if any, recognized by a U.S. holder on the sale or other
disposition of Japanese yen will be U.S. source ordinary income or loss.

     Distributions in excess of Trend Micro's current or accumulated earnings
and profits will be treated first as a non-taxable return of capital which will
reduce the U.S. holder's tax basis in the shares or ADSs. As a result of the
reduction in tax basis, the U.S. holder will realize an increased gain or
reduced loss for tax purposes on a subsequent disposition of the shares or ADSs.
Any distribution in excess of the U.S. holder's tax basis will be taxable as
capital gain. Since the capital gain realized will not be foreign source income
for U.S. tax purposes, a U.S. holder would not be able to use any Japanese
withholding tax on the distribution as a credit against the U.S. tax on the
capital gain. The Japanese withholding tax may be used as a credit against U.S.
tax due on other foreign source income in the appropriate category for foreign
tax credit purposes, or may be allowable as a deduction, as described in the
next paragraph.

     A U.S. holder may elect to claim the Japanese tax withheld or paid on
dividends on the shares or ADSs either as a deduction or as a foreign tax credit
against the U.S. holder's U.S. federal income tax liability. In general, a U.S.
holder can use foreign tax credits only up to the amount of the U.S. holder's
foreign source income. Distributions on shares or ADSs that are taxable as
dividends will generally constitute foreign source ordinary income for purposes
of the U.S. foreign tax credit limitations. The overall limitation on foreign
taxes eligible for credit is calculated separately on specific classes of
income. For this purpose, dividends distributed by Trend Micro on the shares or
ADSs will generally constitute "passive income" or, in the case of certain U.S.
holders, "financial services income." Special rules apply to some individuals
whose foreign source income during the taxable year consists entirely of
"qualified passive income" and whose creditable foreign taxes paid or accrued
during the taxable year do not exceed $300 or $600 in the case of a joint
return. A U.S.

                                       79
<PAGE>

holder may not be allowed a foreign tax credit for foreign taxes withheld on
dividends paid on shares or ADSs if:

     .    the U.S. holder has held the shares or ADSs for less than a specified
          minimum period during which the U.S. holder is not protected from risk
          of loss;

     .    the U.S. holder is obligated to make payments related to the
          dividends; or

     .    the U.S. holder holds the shares in arrangements in which the U.S.
          holder's economic profit, after U.S. taxes, is insubstantial.

     The rules governing the foreign tax credit are complex. You should consult
your tax advisors regarding the availability of the foreign tax credit under
your particular circumstances.

     Japanese income tax will be imposed on a transfer by Trend Micro of
retained earnings or legal reserve to stated capital. Since such a transfer
generally is not a taxable event for U.S. tax purposes, the Japanese income tax
may be treated as imposed on "general limitation" income for U.S. foreign tax
credit purposes. This could affect a U.S. holder's ability to utilize the
credit. Such a transfer is not generally a taxable event for U.S. federal income
tax purposes. Consequently, under the applicable Treasury regulations, any
Japanese income taxes imposed in such case may be treated as imposed on "general
limitation" income, which may affect your ability to utilize the associated
credit.

     Taxation of Disposition of Shares or ADSs

     Upon a sale, exchange or other disposition of a share or an ADS, a U.S.
holder will recognize gain or loss for U.S. federal income tax purposes equal to
the difference between

     .    the U.S. dollar amount realized on the sale, exchange or other
          disposition, or if the amount realized is denominated in yen, the U.S.
          dollar equivalent determined by reference to the yen/dollar spot
          exchange rate on the date of disposition; and

     .    the adjusted basis of the share or ADS.

     Any such gain or loss will constitute capital gain or loss, and will
constitute long-term capital gain or loss if the holding period for the share or
ADS exceeds one year at the time of disposition. Individuals may be entitled to
reduced tax rates on long-term capital gains. The ability to deduct capital
losses may be limited. Any gain or loss recognized by a U.S. holder will
generally be treated as United States source gain or loss.

     Foreign Personal Holding Company Status

     A foreign corporation will be classified as a foreign personal holding
company if both of the following tests are satisfied:

     .    at any time during the taxable year, five or fewer individuals who are
          United States citizens or residents own, or are deemed to own under
          attribution rules, more than 50% of its stock, measured by voting
          power or value; and

     .    at least 60% of its gross income, regardless of source, as
          specifically adjusted, comes from certain passive sources.

                                       80
<PAGE>

     After a corporation becomes a foreign personal holding company, the income
test percentage for each subsequent taxable year is reduced to 50%. Trend Micro
believes that it has not met the shareholder test at any time during its current
taxable year and that it will not meet the shareholder test immediately after
the offering. In addition, Trend Micro believes that it will not meet the income
test. Therefore, Trend Micro believes that it is currently not a foreign
personal holding company for U.S. federal income tax purposes.

     If Trend Micro were to be classified as a foreign personal holding company,
U.S. holders, including some indirect holders, would be required to include in
income, as a dividend, their pro rata share of Trend Micro's undistributed
foreign personal holding company income if they were holders:

     .    on the last day of Trend Micro's taxable year, or

     .    if earlier, the last day of Trend Micro's taxable year in which Trend
          Micro satisfied the share ownership test.

     The pro rata share would increase a U.S. holder's basis in the shares by a
corresponding amount. In addition, if Trend Micro became a foreign personal
holding company, U.S. holders who acquire shares or ADSs from decedents would be
denied the step-up of the income tax basis for such shares or ADSs to fair
market value at the date of death which would otherwise have been available.
Instead, the U.S. holders would have a tax basis equal to the lower of fair
market value or the decedent's basis. Trend Micro will notify U.S. holders if it
becomes aware that it is classified as a foreign personal holding company in any
taxable year.

     Passive Foreign Investment Company Status

     A foreign corporation will be a passive foreign investment company if,
after applying certain "look-through" rules, either:

     .    75% or more of its gross income is "passive income," defined to
          include dividends, interest and certain rents not derived in the
          active conduct of a trade or business, among other items, or

     .    50%, on average and generally by value, of its assets produce, or are
          held for the production of, passive income.

     The look-through rules provide in part that a foreign corporation that owns
at least 25% by value of another corporation will be treated as if it owned a
proportionate share of the other corporation's assets and earned a proportionate
share of its income.

     Trend Micro believes that it currently is not a passive foreign investment
company for U.S. federal income tax purposes and does not anticipate that it
will become a passive foreign investment company in the future. This
determination is based on our current and anticipated sources of income and on
the current value of our tangible and intangible assets, including goodwill. We
have determined our goodwill, in part, on the value of our stock, and a change
in the value of our stock would affect this calculation. Trend Micro will notify
holders if it becomes a passive foreign investment company in any taxable year.

     If Trend Micro were a passive foreign investment company for any taxable
year, the rules described above under "Taxation of Dividends Distributed on the
Shares or ADSs" and "Taxation of Disposition of Shares or ADSs" generally would
not apply. Instead, a U.S. holder of shares or ADSs would have to comply with
special tax rules on "excess distribution" in a taxable year with respect to

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the shares or ADSs. For purposes of the passive foreign investment company
rules, an excess distribution includes:

     .    any gain realized on a disposition of the shares or ADSs; and

     .    any distribution which is greater than 125% of the average of the
          distributions received by the U.S. holder in the three preceding
          taxable years or, if shorter, the period the U.S. holder has held the
          shares or ADSs.

     Under these rules:

     .    the excess distribution or gain would be allocated ratably over the
          U.S. holder's holding period for the shares or ADSs;

     .    the amount allocated to the current taxable year, and any taxable year
          prior to the first taxable year in which we are a passive foreign
          investment company, would be taxed as ordinary income;

     .    the amount allocated to each of the other taxable years would be taxed
          at the highest marginal rate in effect for the applicable class of
          taxpayer for that year; and

     .    an interest charge for the deemed deferral benefit would be imposed on
          the resulting tax attributable to each such other taxable year.

     Any tax liability for amounts allocated to years prior to the year of the
excess distribution may not be offset by any net operating loss of the U.S.
holder. Any gains, but not losses, realized on the disposition of shares or ADSs
of a passive foreign investment company will be taxed as ordinary income, even
if the shares or ADSs are held as capital assets.

     A U.S. holder of shares or ADSs in a passive foreign investment company may
avoid taxation under the rules for excess distributions described above by
making a "qualified electing fund" election to include in income the holder's
share of the company's income for a year, whether or not distributed. However, a
U.S. holder may make a qualified electing fund election only if the company
agrees to furnish the U.S. holder annually with certain tax information, and
Trend Micro does not presently intend to prepare or provide such information.

     A U.S. holder of shares or ADSs in a passive foreign investment company may
limit application of the rules for excess distributions described above by
making a "deemed sale" election once a company ceases to be a passive foreign
investment company. If the U.S. holder makes the election, the U.S. holder will
be taxed under the excess distribution rules as if the holder had disposed of
the shares at the time of the election. A subsequent disposition of the shares
or ADSs and any distributions on the shares or ADSs after the deemed sale
election will not be subject to the excess distribution rules.

     Alternatively, a U.S. holder of "marketable stock" in a passive foreign
investment company may make a mark-to-market election as an alternative to
taxation under the excess distribution rules. Under such election, the
shareholder will include in income each year an amount equal to the excess, if
any, of the fair market value of the passive foreign investment company stock as
of the close of the taxable year over the shareholder's adjusted basis in such
stock. The shareholder is allowed as an ordinary loss a deduction for the
excess, if any, of the adjusted basis of the passive foreign investment company
stock over its fair market value as of the close of the taxable year. However,
deductions are limited to net mark-to-market gains on the stock which the
shareholders included in income for prior taxable years. Amounts included in
income pursuant to a mark-to-market election,

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as well as gain on the actual sale or other disposition of the passive foreign
investment company stock, are treated as ordinary income. Any loss realized on
the sale or disposition of passive foreign investment company stock which does
not exceed net mark-to-market gains previously included in income will be an
ordinary loss. The tax rules applicable to distributions by corporations which
are not passive foreign investment companies would apply to distributions by the
passive foreign investment company.

     The mark-to-market election is available for stock or ADSs which are
regularly traded on The Nasdaq National Market. The ADSs are traded on The
Nasdaq National Market and, consequently, the mark-to-market election is
available to U.S. holders of ADSs if Trend Micro were to be or become a passive
foreign investment company.

     A U.S. holder who beneficially owns shares in a passive foreign investment
company must file an annual return with the U.S. Internal Revenue Service on IRS
Form 8621 that describes any distributions received on such shares and any gain
realized on the disposition of such shares.

     Inheritance and Gift Tax

     As discussed in "Tax Considerations--Japanese Taxation" Japanese gift and
inheritance taxes may be imposed on persons who receive Trend Micro stock as a
gift from a U.S. holder or on the death of a U.S. holder. You should consult
your own tax advisors regarding the effect of such taxes and the potential
application of the Estate and Gift Tax Treaty between the United States and
Japan.

     Information Reporting and Backup Withholding

     Information reporting to the Internal Revenue Service and backup
withholding at a rate of 31% may apply to distributions on shares or ADSs and to
proceeds from sales of shares or ADSs. Backup withholding will not apply to:

     .    a U.S. corporation or organization which is exempt from backup
          withholding and, when required, provides evidence of its status; and

     .    a U.S. holder who:

          .    provides a correct taxpayer identification number;

          .    certifies as to no loss of exemption from backup withholding; and

          .    otherwise complies with the backup withholding rules.

Amounts withheld under the backup withholding rules may be credited against a
U.S. holder's tax liability, and a holder may obtain a refund of any excess
amounts withheld under the backup withholding rules by filing the appropriate
claim for refund with the Internal Revenue Service.

                      ENFORCEABILITY OF CIVIL LIABILITIES

     We are a Japanese stock company. Most of our directors and executive
officers and some of the experts named in this prospectus are residents of Japan
or countries other than the United States. All or a substantial portion of our
assets and the assets of our directors and officers are located outside the
United States. As a result, ADS holders may not be able to make service of
process within the United States upon these persons or us, or to enforce in U.S.
courts, or outside the United States, judgments obtained against such persons in
U.S. courts. Holders may also not be able to

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enforce in U.S. courts judgments obtained against such persons in non-U.S.
courts. In particular, it may be difficult for holders to enforce, in lawsuits
brought originally in U.S. or non-U.S. courts, liabilities predicated upon the
U.S. securities laws. We have been advised by our Japanese legal counsel,
Mitsui, Yasuda, Wani & Maeda, that there is doubt as to whether civil
liabilities based solely upon U.S. laws, including the U.S. federal securities
laws, are enforceable against such persons in Japan, whether in original actions
or in actions for the enforcement of judgments of U.S. courts.

                         JAPANESE FOREIGN EXCHANGE AND

                               OTHER REGULATIONS

Japanese Foreign Exchange Regulations

     The Foreign Exchange and Foreign Trade Law of Japan and the cabinet orders
and ministerial ordinances issued under the law govern the acquisition and
holding of shares of equity securities of Japanese corporations, including Trend
Micro, by exchange non-residents and by foreign investors.

     Exchange non-residents are individuals who are not resident in Japan and
corporations whose principal offices are located outside Japan. Generally,
branches and other offices of non-resident corporations located within Japan are
regarded as exchange residents of Japan and branches and other offices of
Japanese corporations located outside Japan are regarded as exchange non-
residents of Japan.

     Foreign investors are defined to be:

     .    individuals not resident in Japan;

     .    corporations which are organized under the laws of foreign countries
          or whose principal offices are located outside Japan;

     .    corporations not less than 50% of the shares of which are held by
          individuals or corporations described above; and

     .    a corporation in which a majority of the directors or similar persons
          having the power of representation are non-resident individuals of
          Japan.

     On May 23, 1997 the Foreign Exchange and Foreign Trade Law was amended with
effect from April 1, 1998. In accordance with this amendment, with minor
exceptions, all aspects of the foreign exchange and foreign trade transactions
which under the previous law required licensing or other approval or prior
notification to the Minister of Finance of Japan now only require reporting of
such transactions after they occur. However, the Minister of Finance of Japan
retains the power to impose a licensing requirement for some transactions in
limited circumstances.

Offering of the Shares

     A selling shareholder is required to file a report concerning the transfer
of securities with the Minister of Finance of Japan within 20 days of the date
of transfer.

Acquisition of Shares

     Except as described below, there are no limits under Japanese law on the
right of foreign investors to hold or vote our securities. Exchange non-
residents who acquire from an exchange

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resident of Japan shares of a company, listed on any Japanese stock exchange or
whose shares are traded on the Japanese over-the-counter market, are not
required to file any notice prior to the acquisition. Under the Foreign Exchange
and Foreign Trade Law the Minister of Finance may in some exceptional
circumstances require prior approval for any such acquisition. An exchange
resident who transfers shares of a listed company to an exchange non-resident
for value exceeding (Yen)100 million must file a report concerning the transfer
of securities with the Minister of Finance within 20 days of the date of such
transfer.

     If a foreign investor acquires shares of a company listed on any Japanese
stock exchange or whose shares are traded on the Japanese over-the-counter
market and as a result of the acquisition, such foreign investor and designated
related parties hold 10% or more of the issued shares, the foreign investor must
file a report of the acquisition with the Minister of Finance and other
Ministers having jurisdiction over the business of the issuer within 15 days
from and including the date of the acquisition. In limited circumstances,
including the case of an acquisition of the shares of Trend Micro that causes a
foreign investor's ownership to reach such percentage, however, a prior
notification of the acquisition must be filed with the Minister of Finance and
other Ministers having jurisdiction over the business of the issuer. These
Ministers may modify or prohibit the proposed acquisition.

Dividends and Proceeds of Sales

     Under the Foreign Exchange and Foreign Trade Law, dividends paid on, and
the proceeds of sales in Japan of, shares held by exchange non-residents may, in
general, be converted into any foreign currency and repatriated abroad. The
requirements described in "--Acquisition of Shares" above do not apply to the
acquisition of shares by non-residents by way of stock splits.

American Depositary Shares

     The formalities or restrictions referred to under "--Acquisition of Shares"
above do not apply to the deposit of shares by a non-resident of Japan, the
issuance of ADRs evidencing the ADSs created by such deposit in exchange
therefor and the withdrawal of whole units of underlying shares upon surrender
of ADRs.

Reporting of Substantial Shareholdings

     The Securities and Exchange Law of Japan requires any person who has become
a beneficial owner of more than 5% of the total issued shares of a company
listed on any Japanese stock exchange or whose shares are traded on the Japanese
over-the-counter market to file with the Minister of Finance within five
business days a report concerning such shareholdings.

     A similar report must also be made in respect of any subsequent change of
1% or more in any such holding. For this purpose, shares issuable to such person
upon conversion of convertible securities or exercise of share subscription
warrants are taken into account in determining both the number of shares held by
the holder and the issuer's total issued share capital. Copies of each such
report must also be furnished to the issuer of such shares and all Japanese
stock exchanges on which the shares are listed or, in the case of shares traded
in the Japanese over-the-counter market, the Japan Securities Dealers
Association.

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                             PLAN OF DISTRIBUTION

Description of the U.S. Program of the 1999 Incentive Plan

     General

     Our board of directors and Trend U.S.'s board of directors adopted the U.S.
program of the 1999 incentive plan in June and July 1999, respectively. Gainway
Enterprises Limited, Trueway Company Limited and Steve Jang-Ming Chang, our
President, formed STG Incentive Company L.L.C., a Delaware limited liability
company, in July 1999 to issue options under the U.S. program to acquire up to
810,000 of our outstanding shares. Gainway Enterprises Limited has contributed
243,000 shares, Trueway Company Limited has contributed 471,000 shares, and
Steve Chang has contributed 96,000 shares to STG Incentive Company L.L.C. for
sale upon the exercise of options granted by STG Incentive Company L.L.C. under
the U.S. program. A total of 810,000 shares have been deposited with Toyo Trust
by STG Incentive Company L.L.C. for sale under the U.S. program.

     Options granted under the U.S. program will be non-qualified stock options
which do not qualify as "incentive stock options" as defined in Section 422 of
the Internal Revenue Code of 1986, as amended. Please refer to "Tax
Considerations--U.S. Federal Income Taxation--U.S. Federal Tax Consequences of
Options" on page __ above for information concerning the tax treatment of non-
qualified stock options.

     The U.S. program is not a qualified deferred compensation plan under
Section 401(a) of the Internal Revenue Code and is not subject to the provisions
of the Employee Retirement Income Security Act of 1974.

     Purposes

     The purposes of the U.S. program are to attract and retain the best
available personnel for, to provide additional incentives to the employees and
directors of, Trend U.S. and to promote the success of Trend U.S.'s business.

     Administration of the U.S. program

     The U.S. program may be administered by Trend U.S.'s board of directors or
by a committee or an officer of Trend Micro or Trend U.S. designated by the
board, and is currently being administered by Andrew Lai. Mr. Lai is Chief
Operating Officer, Executive Vice President and a director of Trend Micro. Mr.
Lai receives no compensation for his services in administering the U.S. program.

     The administrator of the U.S. program has sole discretion to interpret any
provision of the U.S. program, and to determine the terms of options granted
under the U.S. program, including:

     .    the exercise price of options granted,

     .    the number of shares which you can purchase upon exercise of your
          option,

     .    employees and non-employee directors who will receive options,

     .    the vesting schedule for your options, and

     .    any amendments to any option granted.

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<PAGE>

     Eligibility

     Stock options may be granted under the U.S. program to employees or non-
employee directors of Trend U.S.

     Terms of Options Granted Under the U.S. Program

     Each option is evidenced by a written stock option agreement between STG
Incentive Company L.L.C. and the optionee. The option agreement includes the
following terms and conditions:

          Exercise of the Option. No option may be exercised for less than 500
     shares. At the time you desire to exercise your options, you will forward a
     notice of exercise along with the exercise price to the option agent in the
     United States, The Bank of New York. The option agent will forward the
     exercise price directly to STG Incentive Company L.L.C. and the notice of
     exercise to the transfer agent in Japan, Toyo Trust. The transfer agent
     will send the shares to a custodian in Japan, The Fuji Bank, Limited, which
     will deposit the shares in our ADR program in the United States and will
     issue instructions for the ADR depositary bank, The Bank of New York, to
     issue ADRs to you.

          Exercise Price. The per share exercise price of options granted under
     the U.S. program will be the fair market value of the shares on the date of
     grant. The U.S. program defines fair market value as the closing sales
     price as quoted on the stock exchange determined by the administrator of
     the U.S. program to be the primary market for the common stock, or The
     Nasdaq National Market, whichever is applicable.

          Exercise and Means of Payment. You may exercise your option by
     delivery of the notice of exercise and the exercise price to the option
     agent, The Bank of New York. The Bank of New York will pay the exercise
     price to STG Incentive Company L.L.C. and will notify the transfer agent,
     Toyo Trust, to issue a share certificate in your name evidencing the number
     of shares you have acquired from STG Incentive Company L.L.C. The shares
     will be then handled as described above under "Exercise of the Option."

          Dividend and Voting Rights. Even if you have exercised an option, you
     won't have voting, dividend or other rights as a shareholder in connection
     with the shares you acquire until Toyo Trust registers you as the holder of
     the shares on the stock register of the Company.

          Termination of Employment. If your service with Trend U.S. is
     terminated for any reason other than cause, death or disability, the option
     may be exercised within one month after termination if the option was
     vested and exercisable at the time of termination. To the extent the option
     has not vested as of the termination date, or if you do not exercise such
     option within the time period specified above, the option will terminate.
     If your service terminates for cause, the option will terminate
     immediately.

          Death. If you die while serving as an employee or director of Trend
     U.S., the option may be exercised at any time within six months after
     death, but only to the extent you were entitled to exercise the option at
     the time of death. If you die (1) within one month after termination, other
     than for cause, of your service with Trend U.S., or (2) during the six-
     month period following termination of your service as a result of
     disability, the option may be exercised within six months after your death
     to the extent the option was vested on the date of death.

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<PAGE>

          Disability. If you become permanently disabled, and your service
     terminates as a result of the disability, you may exercise your option
     within six months from the date of termination, to the extent that the
     option was vested at the termination date.

          Termination of Options. Options granted under the U.S. program expire
     four years from the date of grant, unless your option agreement provides
     for a shorter term.

          Transferability of Options. Options may be transferred only by will,
     by the laws of descent and distribution, and if authorized by the
     administrator of the U.S. program, to members of your immediate family or
     pursuant to a domestic relations order.

          Other Provisions. If your option expires without being exercised, the
     underlying shares will be available for sale upon the exercise of
     additional options if Trend U.S.'s board or its committee decides to grant
     them later. Any shares which have not been purchased as of the date the
     U.S. program terminates will be retained by STG Incentive Company L.L.C.,
     which may distribute those shares to its members, Trueway Company Limited,
     Gainway Enterprises Limited and Steve Chang.

     Capital Changes

     If any change, such as a stock split, stock dividend, combination or
reclassification, is made which results in any increase or decrease in the
number of issued shares without our receipt of consideration, Trend U.S.'s board
or its committee will determine whether to adjust (1) the exercise price and the
number of shares subject to outstanding options under the U.S. program, and (2)
the number of shares reserved for sale under the U.S. program, if any, which are
not then subject to outstanding options.

     If there is a sale of our assets, or a merger of Trend Micro or Trend U.S.
with or into another corporation where Trend Micro or Trend U.S. is not the
surviving entity or which results in shareholders who were not shareholders
before such merger owning 50% of Trend Micro's or Trend U.S.'s voting shares,
the successor corporation will assume each option under the U.S. program, or
substitute an equivalent option. However, if the administrator of the U.S.
program decides that you will have the right to exercise the option immediately
and purchase all of the underlying shares, the administrator will notify you
that the option is exercisable for a period of thirty days from the date of such
notice. After this period, the option will terminate.

     If Trend Micro, Trend U.S. or a subsidiary of Trend U.S. sells its
interests in an entity in which it holds a substantial ownership interest, as
part of a sale, merger or consolidation of that entity and you are providing
service primarily to that entity at the time, your options will vest, will be
released from any restrictions on transfer and will become exercisable in
accordance with the terms of your award agreement, unless your options are
assumed by the successor entity or Trend Micro.

     Amendment and Termination

     The U.S. program shall continue for four (4) years unless sooner terminated
by the administrator. The administrator may amend the U.S. program at any time
or may terminate it without approval of the shareholders, unless shareholder
approval is required under applicable law. No amendment of the U.S. program or
termination of the U.S. program prior to its expiration can affect options which
have already been granted. Any outstanding options under the U.S. program which
have not been exercised at the expiration of the U.S. program's term will
terminate.

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<PAGE>

     Affiliates of Trend Micro

     Our officers and directors may be deemed to be "affiliates" of Trend Micro
as that term is defined under Rule 144 of the Securities Act of 1933. Shares
purchased under the U.S. Program by affiliates are subject to special
restrictions on resale imposed by Rule 144 under the Securities Act. Among other
requirements, Rule 144 imposes volume limitations on resales by affiliates. For
these reasons, officers and directors who acquire shares under the U.S. program
should consult legal counsel before exercising an option or selling the
underlying shares.

     Terms of the Master Agreement between Trend U.S., STG Incentive Company
L.L.C. and Toyo Trust

     Under the terms of the Master Agreement among The Bank of New York, Trend
U.S., STG Incentive Company L.L.C., and Toyo Trust, STG Incentive Company L.L.C.
has deposited with Toyo Trust the shares which you will acquire upon exercise of
your options granted under the U.S. program.

     Toyo Trust will hold the shares deposited by STG Incentive Company L.L.C.
pending exercise of options under the U.S. program. When you exercise your
option, you will send a notice of exercise and the exercise price to The Bank of
New York. The Bank of New York will pay the exercise price to STG Incentive
Company L.L.C. The Bank of New York will also notify Toyo Trust to register on
our share register in your name the number of shares you have acquired from STG
Incentive Company L.L.C. The shares will be then handled as described above
under ".Terms of Options Granted Under the U.S. Program.Exercise of the Option."
Upon termination of the U.S. program and options issued under the U.S. program,
Toyo Trust will return all shares of Trend Micro common stock it still holds to
STG Incentive Company L.L.C.

     STG Incentive Company L.L.C.

     Trueway Company Limited, Gainway Enterprises Limited and Steve Jang-Ming
Chang have contributed to STG Incentive Company L.L.C. an aggregate of 810,000
shares which may be sold upon exercise of options granted under the U.S.
Program. STG Incentive Company L.L.C. will deposit the shares with Toyo Trust.
Trueway Company Limited, Gainway Enterprises Limited and Steve Jang-Ming Chang
each owns an ownership interest in STG Incentive Company L.L.C. based upon the
number of shares which each has contributed to STG Incentive Company L.L.C. STG
Incentive Company L.L.C. is the record holder of the shares with all of the
rights of a shareholder. Until you exercise your options and you are registered
as a shareholder on the share register of the Company, you will not have any
rights of a shareholder of Trend Micro with respect to those shares. If STG
Incentive Company L.L.C. receives a distribution of shares or other securities
on the shares which it has deposited with Toyo Trust for sale under the U.S.
program, STG Incentive Company L.L.C. will forward those securities to Toyo
Trust so that when you exercise your option, you will receive both the shares
covered by your option and any securities distributed on those shares. STG
Incentive Company L.L.C. will retain any distribution of cash or other assets on
the shares which it has deposited with Toyo Trust for sale under the U.S.
program. STG Incentive Company L.L.C. will retain any shares not sold by the
time the term of the U.S. program expires. If the U.S. program administrator
terminates the U.S. program before its term expires, your options will not be
affected. The options will lapse, however, if you have not exercised them by the
end of the term of the options.

                                 LEGAL MATTERS

     The validity of the shares offered in this offering will be passed upon for
Trend Micro by Mitsui, Yasuda, Wani & Maeda, Tokyo, Japan. Certain legal matters
will be passed upon for Trend Micro and the selling shareholder by Morrison &
Foerster LLP, Tokyo, Japan.

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                                    EXPERTS

     The consolidated financial statements of Trend Micro, as of December 31,
1998 and 1999 and for each of the three years in the period ended December 31,
1999 that are included in this prospectus have been included in reliance on the
report of PricewaterhouseCoopers, independent accountants, given on the
authority of the said firm as experts in auditing and accounting.

                      WHERE YOU CAN FIND MORE INFORMATION

     We have filed a registration statement on Form F-1 with the Securities and
Exchange Commission covering the shares offered by this prospectus. This
prospectus, which forms a part of that registration statement, does not contain
all of the information contained in the registration statement. Please refer to
the registration statement and its exhibits for further information on Trend
Micro, the American Depositary Shares and the shares. Information regarding the
contents of contracts or other documents described in this prospectus is not
necessarily complete and you should refer to the exhibits attached to the
registration statement for copies of the actual contracts or documents.

     We file periodic reports and other information with the Commission. You may
read and copy any reports, statements or other information on file at the public
reference facilities maintained by the Commission at Room 1024, Judiciary Plaza,
450 Fifth Street, N.W., Washington, D.C. 20549, and at the regional offices of
the Commission located at 7 World Trade Center, 13th Floor, New York, New York
10048 and at Citicorp Center, 500 West Madison Street, Suite 1400, Chicago,
Illinois 60661. You can also obtain copies of this material from the Public
Reference Section of the Commission, at Room 1024, Judiciary Plaza, 450 Fifth
Street, N.W., Washington, D.C. 20549, at prescribed rates. The ADSs are traded
on The Nasdaq National Market under the symbol "TMIC." As a foreign private
issuer, we are exempt from the rules under the Securities Exchange Act of 1934
prescribing the furnishing and content of proxy statements to shareholders.

     In addition to the information described above, we furnish annual and
interim reports, in Japanese, to registered shareholders, including the
depositary or its nominee. The annual reports contain a description of our
operations and are accompanied by audited annual financial statements, in
Japanese, prepared in conformity with Japanese GAAP. Semi-annual interim reports
include unaudited interim financial information prepared in accordance with
Japanese GAAP. Trend Micro will furnish to the depositary translations of these
semi-annual reports. Trend Micro will furnish to the depositary annual reports
in English, including annual financial statements prepared in accordance with
U.S. GAAP. We will also translate into English, if not already in English, or
summarize notices of meetings of shareholders and other communications which are
made generally available to our shareholders in Japan and of material importance
to shareholders, and promptly furnish such English versions to the depositary.
The depositary has agreed that it will promptly mail such reports to all record
holders of ADRs evidencing ADSs.

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   SUMMARY OF SIGNIFICANT DIFFERENCES BETWEEN GENERALLY ACCEPTED ACCOUNTING
                   PRINCIPLES IN JAPAN AND THE UNITED STATES

     We have prepared our consolidated financial statements in conformity with
U.S. GAAP. However, other financial information in this prospectus has been
prepared in conformity with Japanese GAAP, which differs from U.S. GAAP in
material respects. This summary highlights some significant differences between
Japanese GAAP and U.S. GAAP applicable to Trend Micro and our consolidated
subsidiaries. However, this summary is not exhaustive. In addition, regulatory
bodies that promulgate Japanese GAAP and U.S. GAAP have significant projects
ongoing that could affect companies such as Trend Micro in the future. We have
not attempted to identify below future differences between Japanese GAAP and
U.S. GAAP as the result of prescribed changes in accounting standards.

1.   Statement of cash flows

     Under Japanese GAAP, a consolidated statement of cash flows was not
     required as part of Trend Micro's basic financial statements for the 1998
     fiscal year. Such statement was required as part of Trend Micro's basic
     financial statements for the 1999 fiscal year.

     Under U.S. GAAP, a statement of cash flows is required as part of the basic
     financial statements, and cash and cash equivalents include highly liquid
     investments that generally have original maturities at the time of purchase
     of three months or less.

2.   Post-contract support revenues

     Under Japanese GAAP, we recognize revenues related to post-contract support
     agreements upon the commencement of the agreement. Trend Micro's renewed
     software license agreements are considered post-contract support
     agreements. Under U.S. GAAP, post-contract support revenues are deferred
     and recognized over the period of the agreements.

3.   Valuation of inventories

     Under Japanese GAAP, inventories can be stated at the lower of cost or
     market.

     U.S. GAAP requires all inventories to be valued at the lower of cost or
     market.

4.   Valuation of securities

     Under Japanese GAAP, investments in marketable securities are stated at the
     lower of cost or market, and non-marketable securities can be stated at
     cost. However, when significant impairment of value has been deemed
     permanent, cost is appropriately reduced.

     Under U.S. GAAP, investments in debt securities and equity securities that
     have readily determinable fair values, except for investments accounted for
     using the equity method, are to be classified in three categories and
     accounted for as follows:

          (a)  Debt securities that the enterprise has the positive intent and
               ability to hold to maturity are classified as held-to-maturity
               securities and reported at amortized cost. Unrealized holdings
               gains and losses are not reported in the financial statements
               until realized or until a decline in fair value below cost is
               deemed to be other than temporary.

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          (b)  Debt and marketable equity securities that are acquired and held
               principally for the purpose of selling them in the near term are
               classified as trading securities and reported at fair value, with
               unrealized gains and losses included in earnings.

          (c)  Debt and equity securities not classified as either held-to-
               maturity securities or trading securities are classified as
               available-for-sale securities and reported at fair value, with
               unrealized gains and losses excluded from earnings and reported
               in a separate component of shareholders' equity.

5.   Accounting for income taxes

     Under Japanese GAAP, income taxes are principally provided for based on
     taxable income for the period, determined in accordance with applicable tax
     laws. For fiscal years beginning on or after April 1, 1999, deferred tax
     accounting must be applied in consolidated financial statements. Trend
     Micro has applied deferred tax accounting in its consolidated financial
     statements since the 1996 fiscal year.

     U.S. GAAP requires that deferred income taxes be recognized for temporary
     differences between the tax basis of the assets or liabilities and the
     reported amount in the financial statements and for tax loss carry-forwards
     which are permitted to be carried forward to offset taxable income over the
     next five years under the Japanese Income Tax Law. A valuation allowance is
     provided for the deferred tax assets if it is more likely than not that
     these assets will not be realized.

6.   Translation of Foreign Currency Financial Statements

     Under Japanese GAAP, financial statements of overseas subsidiaries,
     affiliated companies and branches are translated into Japanese yen at the
     exchange rates prevailing at the end of the fiscal year of each entity,
     except for the shareholders' equity accounts, which are translated at
     historical rates. Income and expenses are translated at average rates of
     exchange prevailing during the year. Resulting gains and losses are
     deferred and presented as an asset or liability on the balance sheet.

     Under U.S. GAAP, assets and liabilities of overseas entities are translated
     into Japanese yen at the respective fiscal year-end exchange rates. Income
     and expenses are translated at average rates of exchange prevailing during
     the year. Resulting gains and losses are excluded from income and included
     in a separate component of shareholders' equity.

7.   Accrued compensated absences

     Under Japanese GAAP, accrued compensated absences are normally not
     recognized for future absences due to the fact that such accruals do not
     meet the conditions for tax deductible provisions. The Company does not
     recognize such accrued compensated absences.

     U.S. GAAP requires that accrued compensated absences be recognized as
     earned by employees.

8.   Accounting for Employee Retirement and Severance Benefits

     Under Japanese GAAP, an accrual is established for unfunded retirement
     allowances in the amount payable if all employees voluntarily terminated
     their employment at the balance sheet

                                       92
<PAGE>

     date. For pension plans, pension expense is generally provided based on
     actuarial determinations and is charged to income when paid.

     U.S. GAAP requires pension costs to be actuarially computed and charged to
     expense as stipulated by Statement of Financial Accounting Standards No.
     87, "Employers' Accounting for Pensions."

9.   Bonuses to Directors and Statutory Auditors

     Under Japanese GAAP, bonuses to directors and statutory auditors are
     accounted for as an appropriation of retained earnings when approved by the
     stockholders.

     Under U.S. GAAP, such bonuses are generally accrued as an expense.

10.  Warrant Compensation Expense

     Under Japanese GAAP, the carrying value of the warrants is recognized as
     compensation expense when the warrants are subsequently distributed to
     employees. The carrying value is equal to the purchase price paid by the
     company to repurchase the warrants following issuance of bonds with
     detachable warrants as required by Japanese law. No compensation expense is
     recognized based on the difference between the warrant exercise price and
     the fair value of the company's stock on the date of grant.

     Under U.S. GAAP, the difference between the fair value of the underlying
     stock as of the "measurement date," which, in general, is either the grant
     date or the date on which both the number of shares to which the employee
     is entitled and the exercise price are known, and the warrant exercise
     price is recognized as compensation expense and charged against income over
     the warrant vesting period.

                                       93
<PAGE>

                           TREND MICRO INCORPORATED
                         AND CONSOLIDATED SUBSIDIARIES

                  INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

<TABLE>
<CAPTION>
                                                                                                                   Page
<S>                                                                                                                <C>
Report of independent accountants...............................................................................   F-2

Consolidated balance sheets at December 31, 1998 and 1999.......................................................   F-3

Consolidated statements of income for the years ended December 31, 1997, 1998 and 1999..........................   F-5

Consolidated statements of comprehensive income for the years ended December 31, 1997, 1998 and 1999............   F-6

Consolidated statements of shareholders' equity for the years ended December 31, 1997, 1998 and 1999............   F-7

Consolidated statements of cash flows for the years ended December 31, 1997, 1998 and 1999......................   F-9

Notes to consolidated financial statements......................................................................   F-11

Financial statement schedule for the years ended December 31, 1997, 1998 and 1999:

Schedule II - Valuation and qualifying accounts.................................................................   F-36
</TABLE>

All other schedules are omitted because they are not applicable or the required
information is shown in the financial statements or the notes thereto.

Financial statements of majority - owned subsidiaries of the registrant not
consolidated and of 50% or less owned persons accounted for by the equity method
have been omitted because the registrant's proportionate share of the income
from continuing operations before income taxes, and total assets of each such
company is less than 20% of the respective consolidated amounts, and the
investment in and advances to each company is less than 20% of consolidated
total assets.

                                      F-1
<PAGE>

                       Report of Independent Accountants
                       ---------------------------------

To the Shareholders and Board of Directors of
Trend Micro Kabushiki Kaisha
("Trend Micro Incorporated"):


In our opinion, the consolidated financial statements and financial statement
schedule listed in the accompanying index present fairly, in all material
respects, the financial position of Trend Micro Incorporated and its
consolidated subsidiaries at December 31, 1998 and 1999, and the results of
their operations and their cash flows for each of the three years in the period
ended December 31, 1999, in conformity with accounting principles generally
accepted in the United States of America. These financial statements are the
responsibility of the company's management; our responsibility is to express an
opinion on these financial statements based on our audits. We conducted our
audits of these statements in accordance with auditing standards generally
accepted in the United States of America which require that we plan and perform
the audit to obtain reasonable assurance about whether the financial statements
are free of material misstatement. An audit includes examining, on a test basis,
evidence supporting the amounts and disclosures in the financial statements,
assessing the accounting principles used and significant estimates made by
management, and evaluating the overall financial statement presentation. We
believe that our audits provide a reasonable basis for the opinion expressed
above.

/s/ PricewaterhouseCoopers



PricewaterhouseCoopers
Tokyo, Japan
April 25, 2000

                                      F-2
<PAGE>

                           TREND MICRO INCORPORATED
                         AND CONSOLIDATED SUBSIDIARIES

                          CONSOLIDATED BALANCE SHEETS

<TABLE>
<CAPTION>
                                                                                                            Thousands of
                                                                            Thousands of yen                U.S. dollars
                                                                  -----------------------------------     ----------------
                                                                             December 31
                                                                  -----------------------------------        December 31,
                                                                       1998                1999                 1999
                                                                  ---------------     ---------------     ----------------
<S>                                                               <C>                 <C>                 <C>
ASSETS
Current assets:
   Cash and cash equivalents.................................     (Yen) 9,396,477     (Yen)15,648,881     $        153,180
   Marketable securities.....................................           1,738,204             624,328                6,111
   Notes and accounts receivable, trade......................           4,474,510           6,057,172               59,291
   Allowance for doubtful accounts and sales returns.........            (338,881)           (382,973)              (3,749)
   Inventories...............................................              60,059              64,036                  627
   Deferred income taxes.....................................             394,922             922,061                9,026
   Prepaid expenses and other current assets.................             449,271             771,577                7,553
                                                                  ---------------     ---------------     ----------------
             Total current assets............................          16,174,562          23,705,082              232,039
                                                                  ---------------     ---------------     ----------------

Investments and other assets:
   Securities investments....................................              97,650           3,078,406               30,133
   Investment in and advances to affiliate company...........                   -              70,144                  687
   Intangibles...............................................             438,366             440,252                4,309
   Deferred income taxes.....................................             129,465             276,609                2,708
   Other.....................................................             380,253             461,125                4,514
                                                                  ---------------     ---------------     ----------------
                                                                        1,045,734           4,326,536               42,351
                                                                  ---------------     ---------------     ----------------

Property and equipment:
   Office furniture and equipment............................             637,442             998,126                9,770
   Other properties..........................................             128,747             222,094                2,174
                                                                  ---------------      --------------     ----------------
                                                                          766,189           1,220,220               11,944
   Less: Accumulated depreciation............................            (270,775)           (470,435)              (4,605)
                                                                  ---------------      --------------     ----------------
                                                                          495,414             749,785                7,339
                                                                  ---------------     ---------------     ----------------

                                                                  (Yen)17,715,710     (Yen)28,781,403     $        281,729
                                                                  ===============     ===============     ================
</TABLE>

       The accompanying notes are an integral part of these statements.

                                      F-3
<PAGE>

                           TREND MICRO INCORPORATED
                         AND CONSOLIDATED SUBSIDIARIES

                          CONSOLIDATED BALANCE SHEETS

<TABLE>
<CAPTION>
                                                                                                               Thousands of U.S.
                                                                                 Thousands of yen                  dollars
                                                                         ----------------------------------    -----------------
                                                                                    December 31
                                                                         ----------------------------------       December 31,
                                                                               1998              1999                1999
                                                                         ---------------   ----------------    -----------------
<S>                                                                      <C>               <C>                 <C>
LIABILITIES AND SHAREHOLDERS' EQUITY
Current liabilities:
  Short-term borrowings...............................................   (Yen)    71,720   (Yen)          -    $               -
  Notes payable, trade................................................           116,951            137,803                1,349
  Accounts payable, trade.............................................           296,438            578,332                5,661
  Accounts payable, other.............................................           347,762            633,806                6,204
  Withholding income taxes............................................           441,903            119,791                1,173
  Accrued expenses....................................................           403,276            343,243                3,360
  Accrued income and other taxes......................................           847,254            981,899                9,611
  Deferred revenue....................................................         1,332,505          2,185,659               21,394
  Other...............................................................            74,475            139,326                1,365
                                                                         ---------------   ----------------    -----------------
          Total current liabilities...................................         3,932,284          5,119,859               50,117
                                                                         ---------------   ----------------    -----------------
Long-term liabilities:
  Long term debt......................................................                 -          6,000,000               58,731
  Deferred revenue....................................................           140,049            226,365                2,216
  Accrued pension and severance costs.................................            70,797            125,246                1,226
                                                                         ---------------   ----------------    -----------------
                                                                                 210,846          6,351,611               62,173
                                                                         ---------------   ----------------    -----------------
Shareholders' equity:
   Common stock
      Authorized
      - 1998     72,000,000 shares  ((Yen)50 par value)
      - 1999     83,000,000 shares  ((Yen)50 par value)
      Issued and outstanding
      - 1998     62,506,800 shares....................................         5,081,714
      - 1999     64,842,900 shares....................................                              5,414,660               53,002
   Additional paid-in capital.........................................         7,735,744          9,198,712               90,042
   Legal reserve......................................................           129,157            149,991                1,468
   Deferred compensation..............................................          (481,331)          (101,528)                (994)
   Retained earnings..................................................         1,164,100          3,082,302               30,171
   Accumulated other comprehensive income -
     Net unrealized gain on debt and equity securities................           234,598            215,922                2,114
     Cumulative translation adjustments...............................          (278,522)          (632,988)              (6,196)
                                                                         ---------------   ----------------    -----------------
                                                                                 (43,924)          (417,066)              (4,082)
                                                                         ---------------   ----------------    -----------------
   Treasury stock, at cost (1998 - 5700 shares; 1999 - 875 shares)..             (12,880)           (17,138)                (168)
                                                                         ---------------   ----------------    -----------------
                                                                              13,572,580         17,309,933              169,439
                                                                         ---------------   ----------------    -----------------
Commitments and contingent liabilities..............................                   -                  -                    -
                                                                         ---------------   ----------------    -----------------
             Total liabilities and shareholders' equity.............     (Yen)17,715,710   (Yen) 28,781,403    $         281,729
                                                                         ===============   ================    =================
</TABLE>

       The accompanying notes are an integral part of these statements.

                                      F-4
<PAGE>

                           TREND MICRO INCORPORATED
                         AND CONSOLIDATED SUBSIDIARIES

                       CONSOLIDATED STATEMENTS OF INCOME

<TABLE>
<CAPTION>
                                                                                                                    Thousands of
                                                                            Thousands of yen                        U.S. dollars
                                                        -------------------------------------------------------   -----------------
                                                                           For the year ended                        For the year
                                                                               December 31                              ended
                                                        -------------------------------------------------------      December 31,
                                                              1997               1998                1999                1999
                                                        --------------      --------------      ---------------   -----------------
<S>                                                     <C>                 <C>                 <C>               <C>
Net sales.............................................. (Yen)7,397,979      (Yen)9,745,664      (Yen)13,633,170   $         133,449
Cost of sales..........................................        733,789             559,530              481,574               4,714
                                                        --------------      --------------      ---------------   -----------------
   Gross profit........................................      6,664,190           9,186,134           13,151,596             128,735
                                                        --------------      --------------      ---------------   -----------------

Operating expenses:
   Selling.............................................      1,315,492           1,617,759            2,239,594              21,922
   Research and development............................        557,001             960,156              994,340               9,733
   General and administrative..........................      2,755,435           4,994,937            5,985,740              58,592
                                                        --------------      --------------      ---------------   -----------------
                                                             4,627,928           7,572,852            9,219,674              90,247
                                                        --------------      --------------      ---------------   -----------------

   Operating income....................................      2,036,262           1,613,282            3,931,922              38,488
                                                        --------------      --------------      ---------------   -----------------

Other income (expenses):
   Interest income.....................................         46,203              44,620              148,487               1,453
   Interest expense....................................        (34,984             (29,279)             (66,526)               (651)
   Gain on sales of marketable securities..............              -             146,310              280,532               2,746
   Foreign exchange gain (loss), net...................         66,907             (70,934)            (174,921)             (1,712)
   Other income (expense), net.........................          3,508              (6,133)            (120,298)             (1,178)
                                                        --------------      --------------      ---------------   -----------------
                                                                81,634              84,584               67,274                 658
                                                        --------------      --------------      ---------------   -----------------

Income before income taxes.............................      2,117,896           1,697,866            3,999,196              39,146
                                                        --------------      --------------      ---------------   -----------------

Income taxes:
   Current.............................................      1,337,364           1,641,902            2,538,455              24,848
   Deferred............................................        (70,919            (347,151)            (688,988)             (6,745)
                                                        --------------      --------------      ---------------   -----------------
                                                             1,266,445           1,294,751            1,849,467              18,103
                                                        --------------      --------------      ---------------   -----------------

Income before equity in losses of affiliated companies.       851,451              403,115            2,149,729              21,043
                                                        --------------      --------------      ---------------   -----------------

Equity in losses of affiliated companies...............             -                    -                2,356                  23

Net income............................................. (Yen) 851,451       (Yen)  403,115    (Yen)   2,147,373   $          21,020
</TABLE>

<TABLE>
<CAPTION>
                                                            Yen                 Yen                 Yen            U.S. dollars
                                                         ----------          ---------            ----------       ------------
<S>                                                      <C>                 <C>                  <C>              <C>
Per share data:
   Net income  - basic.................................  (Yen)15.77          (Yen)7.08            (Yen)33.79           $0.33
               - diluted...............................          --               6.92                 32.85            0.32
   Cash dividends......................................          --                 --                  3.33            0.03
</TABLE>

       The accompanying notes are an integral part of these statements.

                                      F-5
<PAGE>

                           TREND MICRO INCORPORATED
                         AND CONSOLIDATED SUBSIDIARIES

                CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

<TABLE>
<CAPTION>
                                                                                                                   Thousands of
                                                                            Thousands of yen                       U.S. dollars
                                                           ---------------------------------------------------    --------------
                                                                                                                   For the year
                                                                           For the year ended                          ended
                                                                               December 31                         December 31,
                                                           ---------------------------------------------------
                                                                1997               1998              1999              1999
                                                           --------------     --------------    --------------    --------------
<S>                                                        <C>                <C>               <C>               <C>
Net income............................................     (Yen)  851,451     (Yen)  403,115    (Yen)2,147,373    $       21,020
                                                           --------------     --------------    --------------    --------------

Other comprehensive income (loss), net of tax:
   Unrealized gain on debt and equity securities:
      Unrealized holding gains arising during period..            116,840            366,657           168,711             1,651
      Less reclassification adjustment for
        gains included in net income..................                 --            (35,340)         (204,017)           (1,997)
                                                           --------------     --------------    --------------    --------------
                                                                  116,840            331,317           (35,306)             (346)
   Foreign currency translation adjustments...........            (33,384)          (138,397)         (354,466)           (3,470)
                                                           --------------     --------------    --------------    --------------
Other comprehensive income, before tax................             83,456            192,920          (389,772)           (3,816)

Income tax expense related to items of other
   comprehensive income...............................            (59,467)          (154,092)           16,630               163
                                                           --------------     --------------    --------------    --------------
Other comprehensive income, net of tax................             23,989             38,828          (373,142)           (3,653)
                                                           --------------     --------------    --------------    --------------
Comprehensive income..................................     (Yen)  875,440     (Yen)  441,943    (Yen)1,774,231    $       17,367
                                                           ==============     ==============    ==============    ==============
</TABLE>

       The accompanying notes are an integral part of these statements.

                                      F-6
<PAGE>

                           TREND MICRO INCORPORATED
                         AND CONSOLIDATED SUBSIDIARIES

                CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY

<TABLE>
<CAPTION>
                                                                                                                      Thousands of
                                                                               Thousands of yen                       U.S. dollars
                                                              ---------------------------------------------------    --------------
                                                                       For the year ended December 31                  December 31,
                                                              ---------------------------------------------------
                                                                   1997               1998              1999              1999
                                                              --------------     --------------    --------------    --------------
<S>                                                           <C>                <C>               <C>               <C>
Common stock:
   Balance at beginning of year............................   (Yen)  697,575     (Yen)  900,000    (Yen)5,081,714    $       49,743
   New share offering......................................                -          4,038,078                 -                 -
   Transfer of additional paid-in capital to common stock..          202,425                  -                 -                 -
   Exercise of stock purchase warrants.....................                -            143,636           332,946             3,259
                                                              --------------     --------------    --------------    --------------
   Balance at end of year..................................          900,000          5,081,714         5,414,660            53,002
                                                              --------------     --------------    --------------    --------------

Additional paid-in capital:
   Balance at beginning of year............................          667,575            465,150         7,735,744            75,722
   New share offering......................................                -          6,175,578                 -                 -
   Deferred compensation related to stock warrants.........                -            878,798                 -                 -
                                                              --------------     --------------    --------------    --------------
   Tax benefit from exercise of non-qualified stock
      warrants.............................................                -             70,048         1,048,435            10,263
   Gain on sales of treasury stock, net of tax.............                -                  -            76,187               746
   Transfer of additional paid-in capital to common stock..         (202,425)                 -                 -                 -
   Exercise of stock purchase warrants.....................                -            146,170           338,346             3,311
                                                              --------------     --------------    --------------    --------------
   Balance at end of year..................................          465,150          7,735,744         9,198,712            90,042
                                                              --------------     --------------    --------------    --------------

Legal reserve:
   Balance at beginning of year............................                -                  -           129,157             1,264
   Transfers from retained earnings........................                -            129,157            20,834               204
                                                              --------------     --------------    --------------    --------------
   Balance at end of year..................................                -            129,157           149,991             1,468
                                                              --------------     --------------    --------------    --------------

Deferred compensation:
   Balance at beginning of year............................                -                  -          (481,331)           (4,712)
   Deferred compensation related to stock warrants.........                -           (878,798)                -                 -
   Amortization of deferred compensation related
     to stock warrants.....................................                -            397,467           379,803             3,718
                                                              --------------     --------------    --------------    --------------
   Balance at end of year..................................                -           (481,331)         (101,528)             (994)
                                                              --------------     --------------    --------------    --------------

Retained earnings:
   Balance at beginning of year............................          111,359            962,810         1,164,100            11,395
   Net income..............................................          851,451            403,115         2,147,373            21,020
   Stock issue costs, net of tax...........................                -            (56,907)                -                 -
   Transfers to legal reserve..............................                -           (129,157)          (20,834)             (204)
   Cash Dividends .........................................                -                  -          (208,337)           (2,040)
   Loss on sales of treasury stock, net of tax.............                -            (15,761)                -                 -
                                                              --------------     --------------    --------------    --------------
   Balance at end of year..................................   (Yen)  962,810     (Yen)1,164,100    (Yen)3,082,302    $       30,171
                                                              --------------     --------------    --------------    --------------

Net unrealized gain on debt and equity securities:
   Balance at beginning of year............................   (Yen)        -     (Yen)   57,373    (Yen)  234,598    $        2,297
   Net change during the year..............................           57,373            177,225           (18,676)             (183)
                                                              --------------     --------------    --------------    --------------
   Balance at end of year..................................           57,373            234,598           215,922             2,114
                                                              --------------     --------------    --------------    --------------
</TABLE>

       The accompanying notes are an integral part of these statements.

                                      F-7
<PAGE>

                           TREND MICRO INCORPORATED
                         AND CONSOLIDATED SUBSIDIARIES

                CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY

<TABLE>
<S>                                                           <C>                <C>               <C>               <C>
Cumulative translation adjustments:
   Balance at beginning of year..........................           (106,741)          (140,125)         (278,522)           (2,726)
   Aggregate translation adjustments for the year........            (33,384)          (138,397)         (354,466)           (3,470)
                                                              --------------     --------------    --------------    --------------
   Balance at end of year................................           (140,125)          (278,522)         (632,988)           (6,196)
                                                              --------------     --------------    --------------    --------------

Treasury stock, at cost:
   Balance at beginning of year..........................                  -                  -           (12,880)             (126)
   Purchases of treasury stock...........................                  -           (183,269)       (1,260,011)          (12,334)
   Sales of treasury stock...............................                  -            170,389         1,255,753            12,292
                                                              --------------     --------------    --------------    --------------
   Balance at end of year................................                  -            (12,880)          (17,138)             (168)
                                                              --------------     --------------    --------------    --------------

         Total shareholders' equity......................    (Yen) 2,245,208    (Yen)13,572,580   (Yen)17,309,933    $      169,439
                                                              ==============     ==============    ==============    ==============
</TABLE>

       The accompanying notes are an integral part of these statements.

                                      F-8
<PAGE>

                           TREND MICRO INCORPORATED
                         AND CONSOLIDATED SUBSIDIARIES

                     CONSOLIDATED STATEMENTS OF CASH FLOWS

<TABLE>
<CAPTION>
                                                                                                                     Thousands of
                                                                               Thousands of yen                      U.S. dollars
                                                             ----------------------------------------------------- ----------------
                                                                                                                     For the year
                                                                              For the year ended                        ended
                                                                                  December 31                        December 31,
                                                             -----------------------------------------------------
                                                                  1997              1998              1999               1999
                                                             ---------------- ----------------- ------------------ ----------------
<S>                                                          <C>              <C>               <C>                <C>
Cash flows from operating activities:
   Net income............................................... (Yen)  851,451   (Yen)    403,115  (Yen)  2,147,373   $      21,020
   Adjustments to reconcile net income to net cash
     provided by operating activities -
       Amortization of deferred compensation related
     to stock warrants......................................              -            397,467           379,803           3,718
      Depreciation and amortization.........................        143,826            265,857           428,238           4,192
      Pension and severance costs, less payments............         17,546             41,541            58,579             573
      Loss on disposal of fixed assets......................         10,846             11,009             1,192              12
      Deferred income taxes.................................        (70,919)          (347,151)         (688,988)         (6,745)
      Gain on sales of marketable securities................              -           (146,310)         (280,532)         (2,746)
      Equity in losses of affiliated companies..............              -                  -             2,356              23
      Changes in assets and liabilities:
        Increase in deferred revenue........................        679,951            760,031         1,123,053          10,993
        Increase in accounts receivable,
          net of allowances.................................     (1,265,515)        (2,066,603)       (1,945,194)        (19,040)
        (Increase) decrease in inventories..................          1,185              2,750              (541)             (5)
        Increase (decrease) in notes and
          accounts payable trade............................        (41,977)            57,960           377,869           3,699
        Increase (decrease) in accrued income and
          other taxes.......................................        711,517           (326,889)          273,696           2,679
        (Increase) decrease in other current assets.........        524,338            (13,613)         (370,227)         (3,624)
        Increase (decrease) in other current liabilities....        360,384            672,749           (42,540)           (417)
        (Increase) decrease in other assets.................        (20,001)          (249,949)           23,729             232
      Other.................................................        (20,855)           (72,479)                -               -
                                                              -------------    ---------------   ---------------   -------------
             Net cash provided by (used in)
               operating activities.........................      1,881,777           (610,515)        1,487,866          14,564
                                                              -------------    ---------------   ---------------   -------------
Cash flows from investing activities:
   Payments for purchases of fixed assets...................       (322,796)          (440,304)         (620,218)         (6,070)
   Payments for acquisitions of software....................       (128,109)          (190,464)         (185,455)         (1,815)
   Proceeds from sales of marketable securities.............              -            321,011         2,388,480          23,380
   Proceeds from maturities of marketable securities........              -                  -         1,101,846          10,785
   Payments for purchases of marketable securities and
     security investments...................................       (300,906)        (1,200,826)       (5,264,042)        (51,528)
   Investments in affiliated companies......................              -                  -           (72,500)           (710)
   Other....................................................        (58,671)            59,850                92               1
                                                              -------------    ---------------   ---------------   -------------
             Net cash used in investing activities .........  ((Yen)810,482)   ((Yen)1,450,733)  ((Yen)2,651,797)  $     (25,957)
                                                              -------------    ---------------   ---------------   -------------
</TABLE>

        The accompanying notes are an integral part of these statements.

                                      F-9
<PAGE>

                           TREND MICRO INCORPORATED
                         AND CONSOLIDATED SUBSIDIARIES

                     CONSOLIDATED STATEMENTS OF CASH FLOWS

<TABLE>
<CAPTION>
                                                                                                                  Thousands of
                                                                             Thousands of yen                     U.S. dollars
                                                          ----------------------------------------------------- -----------------
                                                                                                                  For the year
                                                                            For the year ended                       ended
                                                                                December 31                       December 31,
                                                          -----------------------------------------------------
                                                                 1997               1998              1999            1999
                                                          ------------------ ----------------- ---------------- -----------------
<S>                                                       <C>                <C>               <C>              <C>
Cash flows from financing activities:
   Issuance of common stock pursuant to
     new share offering, net of issuance costs........... (Yen)        -       (Yen)10,156,171 (Yen)         -  $          -
   Issuance of common stock pursuant to exercise of stock
     warrants............................................              -               287,514         671,292         6,571
   Tax benefit from exercise of non-qualified stock
     warrants............................................              -                70,048       1,048,435        10,263
   Proceeds from issuance of bonds.......................        908,523               609,615       6,000,000        58,731
   Redemption of bonds...................................       (908,523)             (609,615)              -             -
   Decrease in short-term borrowings.....................       (366,786)              (76,145)        (70,600)         (691)
   Dividends paid........................................              -                     -        (208,337)       (2,040)
   Other.................................................           (514)              (28,641)        141,415         1,385
                                                          --------------     ----------------- ---------------  ------------

Net cash provided by (used in) financing activities......       (367,300)           10,408,947       7,582,205        74,219
                                                          --------------     ----------------- ---------------  ------------

Effect of exchange rate changes on cash and cash
   equivalents...........................................        (45,979)              (95,391)       (165,870)       (1,624)
                                                          --------------     ----------------- ---------------  ------------
Net increase in cash and cash equivalents................        658,016             8,252,308       6,252,404        61,202
Cash and cash equivalents at beginning of year...........        486,153             1,144,169       9,396,477        91,978
                                                          --------------     ----------------- ---------------  ------------

Cash and cash equivalents at end of year................. (Yen)1,144,169     (Yen)   9,396,477 (Yen)15,648,881  $    153,180
                                                          ==============     ================= ===============  ============
</TABLE>

        The accompanying notes are an integral part of these statements.

                                      F-10
<PAGE>

                           TREND MICRO INCORPORATED
                         AND CONSOLIDATED SUBSIDIARIES

                  NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1.       Nature of operations

         Trend Micro Incorporated (the "parent company") and its subsidiaries
(collectively "the Company") are primarily engaged in the development,
production and sale of anti-virus software and providing management solutions
for corporate computer systems. The Company is developing such software in
Japan, Taiwan and the United States and its products are marketed by sales
subsidiaries throughout the world.

2.       Summary of significant accounting policies

         The parent company and its subsidiaries in Japan maintain their records
and prepare their financial statements in accordance with accounting principles
generally accepted in Japan, and its foreign subsidiaries maintain their records
and prepare their financial statements in conformity with accounting principles
generally accepted in the respective countries of their domicile. Certain
adjustments and reclassifications, including those relating to the tax effects
of temporary differences, valuation of debt and equity securities and revenue on
post-contract support, have been incorporated in the accompanying consolidated
financial statements to conform with accounting principles generally accepted in
the United States of America ("U.S. GAAP"). These adjustments were not recorded
in the statutory books of account.

         The preparation of financial statements in conformity with U.S. GAAP
requires management to make estimates and assumptions that affect the reported
amounts of assets and liabilities and disclosure of contingent assets and
liabilities at the date of the financial statements and the reported amounts of
revenues and expenses during the reporting period. Actual results could differ
from those estimates.

         Significant accounting policies are as follows:

         Basis of consolidation

         The consolidated financial statements include the accounts of the
parent company and those of its majority-owned subsidiaries. All intercompany
transactions and accounts are eliminated on consolidation.

         Investments in affiliated companies (20 to 50 percent-owned companies)
in which the ability to exercise significant influence exists are stated at cost
plus equity in undistributed earnings (losses). Net consolidated income includes
the company's equity in the current net earnings (losses) of such companies,
after elimination of unrealized intercompany profit.

         The excess of the cost over the underlying net equity of investments in
consolidated subsidiaries and affiliated companies accounted for on an equity
basis is allocated to identifiable assets acquired and liabilities assumed based
on fair values at the date of the acquisition. The unassigned residual value of
the excess of the cost over the underlying net equity is recognized as goodwill
and is amortized on the straight-line basis over a 5-year period except for
minor items

                                     F-11
<PAGE>

which are charged to income immediately. Goodwill at December 31, 1997, 1998 and
1999 was not significant.

         Translation of foreign currencies

         All asset and liability accounts of foreign subsidiaries are translated
into Japanese yen at year-end rates of exchange and all income and expense
accounts are translated at rates of exchange that approximate those prevailing
at the time of the transactions. The resulting translation adjustments are
accumulated as a separate component of shareholders' equity.

         Foreign currency denominated receivables and payables are translated
into Japanese yen at year-end rates of exchange and the resulting translation
gains or losses are taken into current income.

         Revenue recognition

         The Company recognizes revenue from product licenses upon delivery of
software when no significant vendor obligations remain and collection of the
receivable, net of allowances for doubtful accounts and sales returns, is
probable. The Company estimates and recognizes allowances for doubtful accounts
and sales returns at the time of the related sale is recognized and treats them
as revenue reductions. The portion of the license fee attributable to
post-contract support is deferred and recognized as revenue over the license
agreement term. Royalty revenues are recognized as earned unless collection of
the related receivables is not assured. When collection is not assured, revenues
are recognized as payments are received.

         Cash and cash equivalents

         Cash and cash equivalents include cash on hand, cash on deposit with
banks and all highly liquid investments, with original maturities of three
months or less, that are readily convertible to known amounts of cash and are so
near maturity that they present insignificant risk of changes in value because
of changes in interest rates.

         Marketable securities

         Marketable securities consist of debt and equity securities. Debt and
equity securities designated as available-for-sale are carried at fair value
with unrealized gains or losses included as a component of shareholders' equity,
net of applicable taxes. Debt securities designated as held-to-maturity are
carried at amortized cost. Individual securities classified as either
available-for-sale or held-to-maturity are reduced to net realizable value for
other than temporary declines in market value. Realized gains and losses, which
are determined on the average cost method, are reflected in income.

         Inventories

         Finished products and raw materials are valued at the lower of weighted
average cost or net realizable value.

                                      F-12
<PAGE>

         Property and equipment

         Property and equipment are stated at cost. Major renewals and
improvements are capitalized; minor replacements, maintenance and repairs are
charged to current operations. Depreciation of property and equipment is
computed on the declining-balance method for the parent company and on the
straight-line method for foreign subsidiaries at rates based on estimated useful
lives of the assets according to general class, type of construction and use.
Estimated useful lives range from 3 to 5 years for office furniture and
equipment, and from 4 to 24 for other properties.

         Long-lived assets

         The Company evaluates long-lived assets and certain identifiable other
intangibles whenever events or changes in circumstances indicate that the
carrying amount of an asset may not be recoverable. When the sum of expected
future cash flows (undiscounted and without interest charges) is less than the
carrying amount of the asset, an impairment loss is recognized, based on fair
value of the asset. The fair value of the asset is determined using a discounted
cash flows analysis.

         Intangibles

         Intangibles, which mainly consist of software development costs and
purchased software rights, are amortized on a straight-line basis principally
over a three-year period for software development costs and a five-year period
for purchased software rights and other intangibles.

         Research and development costs and software development cost

         All costs relating to research and development to establish the
technological feasibility of software products are expensed as incurred. Under
the Company's software development process, technological feasibility is
established on completing all substantial testing for the original English
language version of the software. Local language versions of software, such as
Japanese or Chinese, are produced from the English language version, by adding
Japanese language or Chinese language related functions. Production costs for
such local language versions of software product masters incurred subsequent to
the availability of an original English language version software are
capitalized. The production costs of the local language software product
masters, which include direct labor and overhead costs, are amortized to cost of
sales using the straight-line method over the current estimated economic lives
of the products, generally up to three years.

         Management considers the Company's capitalized software development
costs to be fully recoverable from future product sales. Management estimates
are based upon supporting facts and circumstances, and may be significantly
impacted based upon subsequent changes in business conditions.

         Stock-based compensation

         The Company accounts for its stock-based incentive awards in accordance
with the intrinsic value method of Accounting Principles Board Opinion No. 25,
"Accounting for Stock Issued to Employees." The Company complies with the
disclosure provisions of Statement of Financial Accounting Standards No. 123
("SFAS No. 123"), "Accounting for Stock-Based Compensation".

                                      F-13
<PAGE>

         Income taxes

         The current provision for income taxes is computed based on the pretax
income included in the consolidated statement of income. The asset and liability
approach is used to recognize deferred tax liabilities and assets for the
expected future tax consequences of temporary differences between the carrying
amounts and the tax bases of assets and liabilities. Valuation allowances are
recorded to reduce deferred tax assets when it is more likely than not that a
tax benefit will not be realized.

         Net income per share

         Basic EPS is computed based on the average number of shares of common
stock outstanding for the period. Diluted EPS assumes the dilution that could
occur if securities or other contracts to issue common stock were exercised or
converted into common stock, or resulted in the issuance of common stock. Net
income per share is appropriately adjusted for any stock split and free
distributions of common stock.

         Free distribution of common stock

         On occasion, the Company may make a free distribution of common stock
to its shareholders which is accounted for either by a transfer of the
applicable par value from additional paid-in capital to the common stock account
or with no entry if free shares are distributed from the portion of previously
issued shares accounted for as excess of par value in the common stock account.
Under the Japanese Commercial Code, a stock dividend which is paid out of
profits can be effected by an appropriation of retained earnings to the common
stock account by resolution of the general shareholders' meeting, followed by a
free distribution with respect to the amount as appropriated by resolution of
the Board of Directors.

         Common stock issue costs

         Common stock issue costs are directly charged to retained earnings, net
of tax, in the accompanying consolidated financial statements as the Japanese
Commercial Code prohibits charging such stock issue costs to capital accounts,
which is the prevailing practice in the United States of America.

         Comprehensive income

         Other comprehensive income refers to revenues, expenses, gains and
losses that under Generally Accepted Accounting Principles are included in
comprehensive income but are excluded from net income as these amounts are
recorded directly as adjustments to shareholders' equity. The Company's other
comprehensive income is primarily comprised of unrealized gains on debt and
equity securities and foreign currency translation adjustments.

         Market and credit risks

         The anti-virus software market is characterized by rapid technological
change and evolving industry standards in computer hardware and software
technology. Further, the markets for the Company's products are highly
competitive and rapidly changing. The Company could incur substantial operating
losses if it is unable to offer products which address technological and market
place change in the anti-virus software industry.

                                      F-14
<PAGE>

         Other financial instruments that potentially subject the Company to
significant concentrations of credit risk consist principally of cash
equivalents, marketable securities and accounts receivable. The Company invests
primarily in money market funds and marketable securities and places its
investments with high quality financial institutions. The Company performs
ongoing credit evaluations of its customers' financial condition and maintains
an allowance for uncollectible accounts receivable, if any, based upon the
expected collectibility of accounts receivable.

         Recent pronouncements

         In June 1998, the Financial Accounting Standards Board issued Statement
of Financial Accounting Standards No. 133 ("FAS 133"), Accounting for Derivative
Instruments and Hedging Activities. FAS 133, as amended, is effective for all
fiscal years beginning after June 15, 2000. FAS 133 requires that all derivative
instruments be recognized as either assets or liabilities on the balance sheet,
measured at fair value. Changes in the fair value of derivatives are recorded
each period in current earnings or other comprehensive income, depending on
whether a derivative qualifies as part of a hedge transaction and the type of
hedge transaction. The portion of a derivative transaction not qualifying as a
hedge will be recognized in earnings. The Company does not expect the adoption
of FAS 133 to have a material impact on the Company's financial position or
results of operations.

         In December 1999, the Securities and Exchange Commission issued Staff
Accounting Bulletin No. 101 ("SAB 101"), Revenue Recognition in Financial
Statements. SAB 101 provides guidance on applying generally accepted accounting
principles to revenue recognition issues in financial statements. The Company
will adopt SAB 101 as required in the fiscal year beginning January 1, 2000. The
Company does not expect the adoption of SAB 101 to have a material impact on the
Company's financial position or results of operations.

         Reclassifications

         Certain prior year amounts have been reclassified to conform to the
1999 presentation.

3.       U.S. dollar amounts

         U.S. dollar amounts presented in the financial statements are included
solely for the convenience of the reader. These translations should not be
construed as representations that the yen amounts actually represent, or have
been or could be converted into U.S. dollars. As the amounts shown in U.S.
dollars are for convenience only, the approximate current rate at December
31,1999 ((Yen)102.16 = U.S. $1) has been used for the purpose of presentation of
the U.S. dollar amounts in the accompanying consolidated financial statements.

                                      F-15
<PAGE>

4.   Reconciliation of the difference between basic and diluted net income per
share ("EPS")

Reconciliation of the differences between basic and diluted EPS for the years
ended December 31, 1997, 1998 and 1999, is as follows:

<TABLE>
<CAPTION>
                                                                Thousands         Thousands
                                                                  of yen          of shares           Yen
                                                             -----------------  ---------------  ---------------
                                                                                  Weighted-
                                                                   Net             average
                                                                  income            shares            EPS
                                                             -----------------  ---------------  ---------------
<S>                                                          <C>                <C>              <C>
For the year ended December 31, 1997
- ------------------------------------
Basic EPS:

   Net income available to common stock holders......            (Yen)851,451          54,000       (Yen)15.77
                                                                 ------------    ------------    ------------
Effect of dilutive securities:
   Shares issuable from assumed exercise of
     stock warrants..................................                       -               -
                                                                 ------------    ------------
Diluted EPS:
   Net income for computation........................            (Yen)851,451          54,000       (Yen)15.77
                                                                 ============    ============    =============

<CAPTION>
                                                                Thousands         Thousands
                                                                  of yen          of shares           Yen
                                                             -----------------  ---------------  ---------------
                                                                                  Weighted-
                                                                   Net             average
                                                                  income            shares            EPS
                                                             -----------------  ---------------  ---------------
<S>                                                          <C>                <C>              <C>
For the year ended December 31, 1998
- ------------------------------------

Basic EPS:
   Net income available to common stock holders......            (Yen)403,115          56,970       (Yen) 7.08
                                                                 -------------   -------------   -------------
Effect of dilutive securities:
   Shares issuable from assumed exercise of
     stock warrants..................................                       -           1,269
                                                                 ------------    ------------
Diluted EPS:
   Net income for computation........................            (Yen)403,115          58,239       (Yen) 6.92
                                                                 ============    ============    =============

<CAPTION>
                                                                Thousands         Thousands
                                                                  of yen          of shares           Yen               Dollars
                                                             -----------------  ---------------  ---------------    ---------------
                                                                                  Weighted-
                                                                   Net             average
                                                                  income            shares            EPS                EPS
                                                             -----------------  ---------------  ---------------    ---------------
<S>                                                          <C>                <C>              <C>                <C>
For the year ended December 31, 1999
- ------------------------------------

Basic EPS:
   Net income available to common stock holders......          (Yen)2,147,373          63,550        (Yen)33.79          $0.33
                                                               --------------    ------------       -----------      ---------
Effect of dilutive securities:
   Shares issuable from assumed exercise of
     stock warrants..................................                       -           1,826
                                                               --------------    ------------
Diluted EPS:
   Net income for computation........................          (Yen)2,147,373          65,376        (Yen)32.85          $0.32
                                                               ==============    ============       ===========      =========
</TABLE>

                                      F-16
<PAGE>

5.   Cash and cash equivalents

     Cash and cash equivalents as of December 31, 1998 and 1999 were comprised
of:

<TABLE>
<CAPTION>
                                                                                      Thousands of
                                                       Thousands of yen               U.S. dollars
                                             -------------------------------------  -----------------
                                                         December 31                  December 31,
                                             -------------------------------------
                                                   1998               1999                1999
                                             ----------------- -------------------  -----------------
<S>                                          <C>               <C>                  <C>
Cash...................................        (Yen)1,744,449     (Yen)4,308,566          $ 42,175
Time deposits..........................             2,040,315         11,340,284           111,005
Money market funds.....................             5,611,713                 31                 0
                                               --------------    ---------------          --------

                                               (Yen)9,396,477    (Yen)15,648,881          $153,180
                                               ==============    ===============          ========
</TABLE>

6.   Supplemental cash flow information

     Cash payments for income taxes were (Yen)594,331 thousand, (Yen)1,690,391
thousand and (Yen)2,247,816 thousand ($22,003 thousand) for the years ended
December 31, 1997, 1998 and 1999, respectively; in these respective periods,
interest payments were (Yen)48,544 thousand, (Yen)17,147 thousand and (Yen)2,417
thousand ($24 thousand).

                                      F-17
<PAGE>

7.   Marketable securities

     Cash equivalents, marketable securities and securities investments include
money market funds, mutual funds and debt and equity securities for which the
aggregate fair value, gross unrealized gains and losses and cost pertaining to
"available-for-sale" investments as of December 31, 1998 and 1999, were as
follows:

<TABLE>
<CAPTION>
                                                                Thousands of yen
                                  ----------------------------------------------------------------------------
                                                                December 31, 1998
                                  ----------------------------------------------------------------------------
                                                                 Gross unrealized
                                                      -------------------------------------
                                        Cost                Gains              Losses            Fair value
                                  ------------------  -----------------   -----------------  -----------------
<S>                               <C>                 <C>                 <C>                <C>
Available for sale:
   Money market funds..........   (Yen)    5,611,713  (Yen)           -   (Yen)           -  (Yen)   5,611,713
   Equity securities...........              186,870            450,508                   -            637,378
   Debt securities.............            1,200,826                  -               2,350          1,198,476
                                  ------------------  -----------------   -----------------  -----------------

        Total..................   (Yen)    6,999,409  (Yen)     450,508   (Yen)       2,350  (Yen)   7,447,567
                                  ==================  =================   =================  =================

<CAPTION>
                                                                Thousands of yen
                                  ----------------------------------------------------------------------------
                                                                December 31, 1999
                                  ----------------------------------------------------------------------------
                                                                 Gross unrealized
                                                      -------------------------------------
                                        Cost                Gains              Losses            Fair value
                                  ------------------  -----------------   -----------------  -----------------
<S>                               <C>                 <C>                 <C>                <C>
Available for sale:
   Money market funds..........   (Yen)           31  (Yen)           -   (Yen)           -  (Yen)          31
   Mutual funds................              960,806                  -                   -            960,806
   Equity securities...........              529,076            412,392                   -            941,468
   Debt securities.............            1,800,000                460                   -          1,800,460
                                  ------------------  -----------------   -----------------  -----------------
        Total..................   (Yen)    3,289,913  (Yen)     412,852   (Yen)           -  (Yen)   3,702,765
                                  ==================  =================   =================  =================

<CAPTION>
                                                            Thousands of U.S. dollars
                                   ---------------------------------------------------------------------------
                                                                December 31, 1999
                                  ----------------------------------------------------------------------------
                                                                 Gross unrealized
                                                      -------------------------------------
                                        Cost                Gains              Losses            Fair value
                                  ------------------  -----------------   -----------------  -----------------
<S>                               <C>                 <C>                 <C>                <C>
Available for sale:
   Money market funds..........   $                -  $               -   $               -  $              --
   Mutual funds................                9,405                  -                   -              9,405
   Equity securities...........                5,180              4,036                   -              9,216
   Debt securities.............               17,619                  5                   -             17,624
                                  ------------------  -----------------   -----------------  -----------------
     Total.....................   $           32,204  $           4,041   $               -  $          36,245
                                  ==================  =================   =================  =================
</TABLE>

     Fair value of money market funds and mutual funds approximate cost due to
the short-term maturities of the investments.

                                      F-18
<PAGE>

     The cost and fair value of "available-for sale" debt securities by
contractual maturity at December 31, 1999, were as follows.:

<TABLE>
<CAPTION>
                                         Thousands of yen                   Thousands of U.S. dollars
                                ------------------------------------   -------------------------------------
                                        Available-for sale                      Available-for sale
                                ------------------------------------   -------------------------------------
                                      Cost              Fair value             Cost           Fair value
                                ------------------   ---------------   ------------------  -----------------
<S>                             <C>                  <C>               <C>                 <C>
Due within one year.........    (Yen)      100,000   (Yen)   100,460   $             978   $             983
Due after one year..........             1,700,000         1,700,000              16,641              16,641
                                ------------------   ---------------   -----------------   -----------------
                                (Yen)    1,800,000   (Yen) 1,800,460   $          17,619   $          17,624
                                ==================   ===============   =================   =================
</TABLE>

     The net unrealized gain on "available-for-sale" securities included in the
separate component of shareholders' equity, net of applicable taxes, increased
by (Yen)57,373 thousand and (Yen)177,225 thousand during the years ended
December 31, 1997 and 1998, respectively, and decreased by (Yen)18,676 thousand
($183 thousand) in the year ended December 31, 1999.

     Proceeds from sales of "available-for-sale" securities for the years ended
December 31, 1998 and 1999 were (Yen)321,011 thousand and (Yen)2,388,480
thousand ($23,380 thousand), respectively. There were no such sales transactions
for the year ended December 31,1997. Gross realized gains on sales of
"available-for-sale" securities for the year ended December 31, 1998 and 1999
were (Yen)146,310 thousand and (Yen)280,532 thousand ($2,746 thousand),
respectively.

     During the year ended December 31, 1999, the Company purchased a long-term
investment security, issued by a nonpublic company in the ordinary course of
business. The carrying amount of the investment in the nonpublic company was
(Yen)417,600 thousand ($4,088 thousand) at December 31,1999. The corresponding
fair value at that date was not computed as such estimation was not readily
determinable.

8.   Inventories

     Inventories as at December 31, 1998 and 1999 were (Yen)60,059 thousand and
(Yen)64,036 thousand ($627 thousand), respectively, and mainly consisted of
finished products and manuals.

                                      F-19
<PAGE>

9.   Investments in affiliated companies

     The investees accounted for using the equity method are NTT Data Security
     Corporation (20.0%) and SOFT TREND CAPITAL CORPORATION (20.0%) at December
     31, 1999, which were established in the year ended December 31, 1999.
     Summarized financial information of the affiliated companies accounted for
     using the equity method is shown below:

<TABLE>
<CAPTION>
                                                                                      Thousands of
                                                                Thousands of yen      U.S. dollars
                                                                ------------------  -----------------
                                                                   December 31,       December 31,
                                                                       1999               1999
                                                                ------------------  -----------------
          <S>                                                   <C>                 <C>
          Current assets....................................    (Yen)    1,778,451  $          17,408
          Non-current assets including property, plant
             and equipment..................................               967,329              9,469
                                                                ------------------  -----------------
              Total assets..................................    (Yen)    2,745,780  $          26,877
                                                                ==================  =================

          Current liabilities...............................    (Yen)    2,395,058  $          23,444
          Shareholders' equity..............................               350,722              3,433
                                                                ------------------  -----------------
              Total liabilities and shareholders' equity....    (Yen)    2,745,780  $          26,877
                                                                ==================  =================

          <CAPTION>
                                                                                      Thousands of
                                                                Thousands of yen      U.S. dollars
                                                                ------------------  -----------------
                                                                    December 31,       December 31,
                                                                       1999                1999
                                                                ------------------  -----------------
          <S>                                                   <C>                 <C>
          Sales.............................................    (Yen)      553,500  $           5,418
                                                                ==================  =================
          Net loss..........................................    (Yen)       11,778  $             115
                                                                ==================  =================
</TABLE>

     A summary of transactions and balances with the affiliated companies
     accounted for by using the equity method is presented below;

<TABLE>
<CAPTION>
                                                                                      Thousands of
                                                                Thousands of yen      U.S. dollars
                                                                ------------------  -----------------
                                                                   For the year       For the year
                                                                      ended              ended
                                                                   December 31,        December 31,
                                                                       1999               1999
                                                                ------------------  -----------------
          <S>                                                   <C>                 <C>
          Purchase..........................................    (Yen)      960,806  $           9,405
                                                                ==================  =================
</TABLE>

                                      F-20
<PAGE>

<TABLE>
<CAPTION>
                                                                             Thousands of            Thousands of
                                                                                  yen                U.S. dollars
                                                                           ------------------      ----------------
                                                                               December 31,            December 31,
                                                                                  1999                    1999
                                                                           ------------------      ----------------
               <S>                                                         <C>                     <C>
               Other receivables........................................   (Yen)        4,731      $             46
                                                                           ==================      ================
</TABLE>

10.  Intangibles

     Intangibles comprise the following:

<TABLE>
<CAPTION>
                                                                                                            Thousands of
                                                                           Thousands of yen                 U.S. dollars
                                                               -------------------------------------      ----------------
                                                                           December 31                      December 31,
                                                               -------------------------------------
                                                                     1998                1999                   1999
                                                               -----------------   -----------------      ----------------
     <S>                                                       <C>                 <C>                    <C>
     Software development costs ............................   (Yen)     318,573   (Yen)     504,029      $          4,934
     Purchased software rights .............................             144,093             144,093                 1,410
     Other .................................................             133,472             137,331                 1,344
                                                               -----------------   -----------------      ----------------
                                                                         596,138             785,453                 7,688
     Less - Accumulated amortization ......................             (157,772)           (345,201)               (3,379)
                                                               -----------------   -----------------      ----------------
                                                               (Yen)     438,366   (Yen)     440,252                 4,309
                                                               =================   =================      ================
</TABLE>

11.  Research and development costs and software development costs

     Research and development costs incurred until all substantial testing for
the original English version product is complete are charged to income. Such
research and development costs charged to income were (Yen)557,001 thousand,
(Yen)960,156 thousand and (Yen)994,340 thousand ($9,733 thousand) for the years
ended December 31, 1997, 1998 and 1999, respectively.

     Software development costs relating to the local language related
functions, representing software development costs as shown in Note 10 above,
after netting the related accumulated amortization, are capitalized and
amortized to cost of sales as follows:

<TABLE>
<CAPTION>
                                                                                                                Thousands of U.S.
                                                                                 Thousands of yen                    dollars
                                                                      ----------------------------------------- ----------------
                                                                                                                   Year ended
                                                                             Year ended December 31                December 31,
                                                                      ------------------------------------------
                                                                           1997          1998         1999           1999
                                                                      -------------- ------------- ------------ ---------------
     <S>                                                              <C>            <C>           <C>          <C>
     Software development costs, net of accumulated amortization:
        Balance, beginning of year ..............................     (Yen)  33,529  (Yen) 107,699 (Yen)250,734      $    2,454
        Additions, at cost ......................................            94,580        190,464      185,455           1,815
        Amortization for the year ...............................           (20,410)       (47,429)    (131,292)         (1,284)
                                                                      -------------  ------------- ------------      ----------
        Balance, end of year.....................................     (Yen) 107,699  (Yen) 250,734 (Yen)304,897      $    2,985
                                                                      =============  ============= ============      ==========
</TABLE>

                                     F-21
<PAGE>

12.  Transactions with related parties

     Stock Sale

     In December 1996, SOFTBANK purchased 18,900,000 shares of common stock of
the Company from the Company's founders for approximately (Yen)185 per share, or
an aggregate of (Yen)3.5 billion. At the time of the sale, the shares sold
represented 35% of the Company's outstanding shares. Pursuant to a price
adjustment provision in the stock sales/purchase agreement, SOFTBANK paid an
additional (Yen)5 billion upon the Company's Japanese initial public offering,
which occurred in August 1998. SOFTBANK sold 3,000,000 shares to an unaffiliated
third party in September 1998 and, through Softbank America, Inc., a wholly-
owned subsidiary of SOFTBANK, owned 15,900,000 shares, representing
approximately a 25% equity ownership interest in the Company as of December
31,1998.

     In July, 1999, Softbank America, Inc. sold 12,750,000 shares to an
unaffiliated third party and currently owns 3,150,000 shares, representing
approximately a 4.9% equity ownership interest in the Company.

     Distribution

     Based on two distribution agreements between the Company and SOFTBANK,
SOFTBANK was granted a non-exclusive right to distribute all of the Company's
anti-virus software products in Japan. Individual sales of products to SOFTBANK
under the agreements have been effected on a purchase-order basis.

     Account balances and transactions with SOFTBANK and its affiliated company
are as follows:

<TABLE>
<CAPTION>
                                                                                                     Thousands of
                                                                   Thousands of yen                   U.S. dollars
                                                      -----------------------------------------
                                                                    December 31                       December 31,
                                                      -----------------------------------------

                                                            1998                    1999                  1999
                                                      ----------------        -----------------      --------------
      <S>                                             <C>                     <C>                    <C>
      Accounts receivable, trade....................  (Yen)    847,431        (Yen)     852,004      $    8,340
      Accounts payable, other.......................            38,338                   18,943             185
      Sales for the year............................         2,386,654                2,453,538          24,017
      Purchases for the year........................           167,609                        -               -
</TABLE>

     The Company believes that each of these transactions was negotiated on an
arm's length basis on terms no less favorable to it than would have been
available from third parties.

     The Company made rebate payments to SOFTBANK amounting to (Yen)5,400
thousand, (Yen)22,600 thousand and (Yen)97,758 thousand ($957 thousand) for the
years ended December 31, 1997, 1998 and 1999, respectively. These rebate amounts
were determined based on SOFTBANK's achievement of sales targets in the
distribution agreements. The rebate payments were recorded as deductions of
sales revenue on an accrual basis.

                                      F-22
<PAGE>

13.  Short-term borrowings and long-term debt

     Short-term borrowings at December 31, 1998 consisted of commercial papers
of (Yen)71,720 thousand with interest rates ranging from 5.6% to 7.88% per
annum, for which time deposits of (Yen)71,720 thousand were pledged as
collateral. Such commercial papers have been repaid in the year ended December
31, 1999.

     At December 31, 1999, the Company had unused lines of credit amounting to
(Yen)800,000 thousand ($7,831 thousand) related to bank overdraft and other
short-term loan agreements. Under these overdraft agreements, the Company is
authorized to obtain short-term financing at prevailing interest rates for
periods not in excess of one year.

     Long term debt at December 31, 1999 consisted of unsecured bonds of
(Yen)6,000,000 thousand ($58,731 thousand) due 2002 with interest rate of 2.5%
per annum. issued in relation to the Company's 1999 incentive plan. On July 29,
1999, the Company issued (Yen)6,000,000 thousand ($58,731 thousand) with 6,000
detachable warrants. One warrant, which is exercisable from August 20, 1999,
entitles the holder to subscribe (Yen)1 million ($10 thousand) for shares of
common stock of the Company at (Yen)6,400 ($63) per share (subject to adjustment
in certain circumstances). Upon issuance of the bonds, the Company bought all of
these warrants and distributed such instruments at fair market value to the
directors and certain employees of the Company and its subsidiaries excluding
the subsidiary in the United States as a part of their remuneration. At December
31, 1999, all warrants were outstanding and will expire on July 22, 2002.

14.  Stock warrants

     Based on the Company's 1997, 1998 and 1999 incentive plans, the Company
issued the following bonds with detachable warrants to SOFTBANK.

<TABLE>
<CAPTION>
<S>                                               <C>                    <C>                <C>                  <C>
1.    Shareholders' meeting approval............. September 29, 1997       March 28, 1998       May 29, 1998          June 30, 1999
2.    Date of bond issuance......................    October 17, 1997      April 15, 1998      June 15, 1998          July 29, 1999
3.    Amount of each bond
      (Thousands of yen).........................       (Yen)908,523         (Yen)412,965       (Yen)196,650         (Yen)6,000,000
4.    The date on which the bonds................
      were fully redeemed........................    October 17, 1997      April 15, 1998      June 15, 1998                      -
5.    The exercise price per
      each warrant...............................           (Yen)285             (Yen)285           (Yen)285             (Yen)6,400
6.    Warrant exercise period.................... October 27, 1997 to      April 27, 1998   June 25, 1998 to        August 20, 1999
                                                     October 12, 2001    to April 5, 2002       June 7, 2002       to July 22, 2002

7.    Number of the shares represented
      by warrants................................          3,187,800            1,449,000            690,000                937,500
8.    Outstanding as of
      December 31, 1998..........................          2,319,000            1,029,300            597,300                      -
9.    Outstanding as of
      December 31, 1999..........................            727,200              514,800            406,800                937,500
</TABLE>

     Upon issuance of each bond, the Company bought all of the warrants and
distributed such instruments to the directors and certain employees of the
Company and its subsidiaries as a part of their remuneration.

         These transactions were accounted for as issuance of debt to Softbank
and separately as issuance of warrants to the directors and employees. The
issuance of the warrants to the directors and employees was accounted for under
APB 25.

                                      F-23
<PAGE>

     Warrant activity was as follows:

<TABLE>
<CAPTION>
                                                                 Thousands of shares represented
                                                                         by warrants
                                                                -----------------------------------
     <S>                                                        <C>
     Outstanding at December 31, 1996......................                 3,188
       Granted.............................................                     -
       Exercised...........................................                     -
       Redeemed............................................                     -
                                                                      -----------
     Outstanding at December 31, 1997......................                 3,188
        Granted............................................                 2,139
        Exercised..........................................                (1,007)
        Redeemed...........................................                  (374)
                                                                      -----------
     Outstanding at December 31, 1998......................                 3,946
        Granted............................................                   937
        Exercised..........................................                (2,336)
        Redeemed...........................................                     -
                                                                      -----------
      Outstanding at December 31, 1999.....................                 2,547
                                                                      ===========
</TABLE>

     Balances are as follows:

<TABLE>
<CAPTION>
                                                                 Thousands of shares
                                                          -----------------------------------
                                                                     December 31
                                                          -----------------------------------
                                                                1998              1999
                                                          ------------------ ----------------
          <S>                                             <C>                <C>
          Authorized and outstanding...............              3,946            2,547
          Exercisable..............................              2,010            1,308
</TABLE>

     For the above stock warrants granted on April 15, 1998 and June 15, 1998,
management calculated deferred compensation expense of (Yen)878,798 thousand
during fiscal 1998. Such deferred compensation will be amortized over the
vesting period which is generally 24 months. Approximately (Yen)397,467 thousand
and (Yen)379,803 thousand ($3,718 thousand) were amortized during fiscal 1998
and 1999, respectively. The grants of October 17, 1997 and July 29, 1999, with
respect to which the vesting period is generally 24 months, did not result in
deferred compensation.

     The subsidiary in the United States introduced the U.S. program of the 1999
incentive plan in July 1999. Under the U.S. program, STG Incentive Company
L.L.C., a Delaware limited company organized for the program by three principal
shareholders of the Company, grants stock options to purchase shares of the
Company's common stock, which vest one year from the date of grant and which are
exercisable for the 3 years subsequent to the vesting date, to directors and
certain employees of the subsidiary in the United States. The grants of options
to the directors and employees were accounted for under APB 25. Option activity
under the U.S. program for the year ended December 31, 1999 was as follows:

                                      F-24
<PAGE>

<TABLE>
<CAPTION>
                                                                      Thousands of shares
                                                                     represented by options
                                                              -----------------------------------
<S>                                                           <C>
   Granted............................................                          810
   Exercised..........................................                            -
   Redeemed...........................................                            -
                                                                          -----------------
Outstanding at December 31, 1999......................                          810
                                                                          =================
</TABLE>

     The exercise price per share for the options granted was determined as
equivalent to the fair market value of the Company's shares at the time of the
grants. The weighted average exercise price per share for the option granted for
the year ended December 31, 1999 was (Yen)6,133 ($60.03). Consequently, the
grants of the option did not result in deferred compensation.

     Certain pro forma disclosures

     In October 1995, SFAS 123 established a fair value based method of
accounting for employee stock based compensation. Had compensation cost for the
Company's stock warrants and the stock options under U.S. program been
determined based on the fair value at the grant dates, as prescribed by SFAS
123, the Company's pro forma net income and net income per share would have been
as follows:

<TABLE>
<CAPTION>
                                                            Year ended December 31
                                    ------------------------------------------------------------------------
                                           1997              1998              1999              1999
                                    ------------------- ---------------- ----------------- -----------------
                                                      (in thousands, except per share data)
<S>                                 <C>                 <C>              <C>               <C>
Net income:
   As reported................       (Yen)     851,451   (Yen)  403,115   (Yen)  2,147,373  $       21,020
   Pro forma net income.......                 851,451          147,610          1,698,432          16,552
Net income per share:
   As reported -
      Basic...................       (Yen)       15.77   (Yen)     7.08   (Yen)      33.79  $         0.33
      Diluted.................                      --             6.92              32.85            0.32
   Pro forma net income -
        Basic.................       (Yen)       15.77   (Yen)     2.59   (Yen)      26.73  $         0.26
      Diluted.................                      --             2.53              25.98            0.25
</TABLE>

     The fair value of each warrant grant was estimated on the date of grant
using the Black-Scholes option pricing model with the following weighted-average
assumptions used for grants during the years ended December 31, 1997, 1998 and
1999; expected life of two years, volatility of 88.6% and dividend yield of 0.0%
for both periods of fiscal 1997 and 1998, expected life of three years,
volatility of 25.8% and dividend yield of 0.0% for 1999; and risk-free interest
rates ranging from 1.235% to 1.765% for options granted during the years ended
December 31, 1997 and 1998, respectively, and the rate of 0.75% for options
granted during the year ended December 31, 1999. The weighted average fair value
per share of options granted above during fiscal 1998 and 1999 were (Yen)557 and
(Yen)953 ($9.32), respectively.

                                     F-25

<PAGE>

15.  Employee benefit plans

     Pension and severance plans

     The parent company has an unfunded retirement allowance plan ("Plan")
covering substantially all of its employees who meet eligibility requirements
under the Plan. Under the Plan, employees whose service with the company is
terminated are, under most circumstances, entitled to lump-sum severance
indemnities, determined by reference to current basic rate of pay, length of
service and conditions under which the termination occurs.

     Effective from March 1, 1998, the Taiwan subsidiary introduced a defined
benefit pension plan which covers substantially all of its employees. Under the
plan, only employees whose service exceeds 15 years or more and who are 55 years
or older at the retirement date are entitled to receive benefits. Benefits
awarded under the plan are based primarily on current rate of pay and length of
service.

     Certain other subsidiaries have defined benefit pension plans or retirement
plans, which cover substantially all of their employees, under which the cost of
benefits is currently funded or accrued. Benefits awarded under these plans are
based primarily on current rate of pay and length of service.

     Information regarding the defined benefit pension plans for the Company and
its consolidated subsidiaries is shown below:

<TABLE>
<CAPTION>
                                                                                                                  Thousands of
                                                                         Thousands of yen                         U.S. dollars
                                                       ------------------------------------------------------   -----------------
                                                                            December 31                           December 31,
                                                       ------------------------------------------------------
                                                             1997              1998               1999                1999
                                                       ----------------- -----------------  -----------------   -----------------
<S>                                                    <C>               <C>                <C>                 <C>
Change in benefit obligation:
   Benefit obligation at beginning of year............   (Yen)  21,990    (Yen)    38,230     (Yen)   130,173    $      1,275
   Service cost.......................................          14,228             48,190              62,451             611
   Interest cost......................................             582              2,659               4,978              49
   Amendments.........................................               -             27,309                  --              --
   Actuarial (gain)/loss..............................           1,989             21,035             (16,136)           (158)
   Benefits paid......................................            (559)            (7,250)             (1,077)            (11)
   Foreign currency exchange impacts..................               -                 --              (6,205)            (61)
                                                         -------------    ---------------     ---------------    ------------
           Projected benefit obligation at end of
             year                                               38,230            130,173             174,184           1,705
                                                         -------------    ---------------     ---------------    ------------
Change in plan assets:
   Fair value of plan assets at beginning of year.....               -                 --              (6,771)            (66)
   Actual return on plan assets.......................               -                (33)               (678)             (7)
   Benefits paid......................................               -                 --               1,077              11
   Employer contribution..............................               -             (6,738)            (11,342)           (111)
   Foreign currency exchange impacts..................               -                 --               4,651              45
                                                         -------------    ---------------     ---------------    ------------
           Fair value of plan assets at end of year...               -             (6,771)            (13,063)           (128)
                                                         -------------    ---------------     ---------------    ------------

Funded status

Unrecognized prior service cost.......................               -            (26,361)            (24,802)           (242)
Unrecognized net actuarial loss.......................          (1,989)           (20,372)             (6,313)            (62)
Unrecognized net transition obligation................          (6,984)            (5,872)             (4,760)            (47)
                                                         -------------    ---------------     ---------------    ------------
Accrued benefit cost..................................   (Yen)  29,257    (Yen)    70,797     (Yen)   125,246    $      1,226
                                                         =============    ===============     ===============    ============
</TABLE>

                                     F-26

<PAGE>

<TABLE>
<CAPTION>
                                                                         Thousands of yen
                                                       ------------------------------------------------------
                                                                            December 31
                                                       ------------------------------------------------------
                                                            1997               1998               1999
                                                       ----------------  -----------------  -----------------
<S>                                                    <C>               <C>                <C>
Weighted-average assumptions as of December 31:

   Discount rate..................................          3.00%             4.60%              4.50%
   Expected return on plan assets.................           --               7.00%              6.50%
   Rate of compensation increase..................          4.00%             4.00%              5.25%
</TABLE>

<TABLE>
<CAPTION>
                                                                                                                  Thousands of
                                                                         Thousands of yen                         U.S. dollars
                                                       ------------------------------------------------------   -----------------
                                                                            December 31                           December 31,
                                                       ------------------------------------------------------
                                                             1997              1998               1999                1999
                                                       ----------------- -----------------  -----------------   -----------------
<S>                                                    <C>               <C>                <C>                 <C>
Components of net periodic benefit cost:

Service cost........................................  (Yen)      14,228   (Yen)    48,190   (Yen)      62,451     $         611
Interest cost.......................................                582             2,659               4,978                49
Expected return on plan assets......................                  -              (162)               (808)               (8)
Amortization of unrecognized transition obligation..              1,112             1,112               1,112                11
Amortization of prior service cost..................                  -               948               1,130                11
Recognized actuarial loss...........................                  -                --                 697                 7
                                                      -----------------   ---------------   -----------------     -------------
Net periodic pension cost...........................  (Yen)      15,922   (Yen)    52,747   (Yen)      69,560     $         681
                                                      =================   ===============   =================     =============
</TABLE>

     Effective from July 1, 1998, the parent company's U.S. subsidiary had a
401(K) retirement plan which covers substantially all of its employees. Under
the plan, employees contribute a certain percentage of their pre-tax salary up
to the maximum dollar limitation prescribed by the Internal Revenue Code.

     Under the Japanese Commercial Code and local practice, the Company may make
severance payments to a retired director or statutory auditor with shareholder
approval, if the Company's management proposes such payments based on a
resolution of the board of directors. However, the Company has no intention to
make such a proposal. The Company does have an internal formula to determine the
amounts of severance payments to directors and statutory auditors if the Company
were to make such a proposal for statutory auditors. The Company has not
recorded any liabilities relating to severance payments to directors and
statutory auditors as of December 31, 1998 and 1999 since the Company has no
liabilities to directors, and related liabilities to statutory auditors are
insignificant.

     Post-retirement benefits other than pensions and post-employment benefits

     The Company does not provide health care and life insurance benefits to
retired employees, nor does it provide benefits to former or inactive employees
after employment but before retirement.

                                     F-27

<PAGE>

16.  Income taxes

     Income before income taxes and provision for income taxes comprise the
following:

<TABLE>
<CAPTION>
                                                                                                             Thousands of
                                                                       Thousands of yen                      U.S. dollars
                                                  -------------------------------------------------------------------------
                                                                                                             Year ended
                                                                  Year ended December 31                      December 31,
                                                  --------------------------------------------------------
                                                        1997               1998               1999                1999
                                                  -----------------  ------------------ ------------------  -----------------
<S>                                               <C>                <C>                <C>                 <C>
Income before income taxes:
   Parent company..............................   (Yen)  1,062,335   (Yen)   934,475    (Yen)  2,541,761    $      24,880
   Foreign subsidiaries........................          1,055,561           763,391           1,457,435           14,266
                                                  ----------------   ---------------    ----------------    -------------
                                                  (Yen)  2,117,896   (Yen) 1,697,866    (Yen)  3,999,196    $      39,146
                                                  ================   ===============    ================    =============
Income taxes, current:
   Parent company..............................   (Yen)  1,121,141   (Yen) 1,276,505    (Yen)  1,245,851    $      12,195
   Foreign subsidiaries........................            216,223           365,397           1,292,604           12,653
                                                  ----------------   ---------------    ----------------    -------------
                                                  (Yen)  1,337,364   (Yen) 1,641,902    (Yen)  2,538,455    $      24,848
                                                  ================   ===============    ================    =============

Income taxes, deferred:
   Parent company..............................   (Yen)    (69,256)  (Yen)  (360,324)   (Yen)    (34,536)   $        (338)
   Foreign subsidiaries........................             (1,663)           13,173            (654,452)          (6,407)
                                                  ----------------   ---------------    ----------------    -------------
                                                  (Yen)    (70,919)  (Yen)  (347,151)   (Yen)   (688,988)   $      (6,745)
                                                  ================   ===============    ================    =============
</TABLE>

     The Company is subject to a number of different income taxes which, in the
aggregate, indicate a statutory tax rate in Japan of approximately 51.4% for the
years ended December 31, 1997 and 1998, and approximately 47.7% for the year
ended December 31, 1999. Amendments to Japanese tax regulations were enacted
into law on March 31, 1998 and on March 24, 1999. As a result of these
amendments, the statutory tax rate is to be reduced from approximately 51.4% to
47.7% effective from the Company's fiscal year beginning January 1, 1999 and
from approximately 47.7% to 42.1% effective from the Company's fiscal year
beginning January 1, 2000.

                                     F-28
<PAGE>

     Reconciliation of the differences between the statutory tax rate and the
effective income tax rate is as follows:

<TABLE>
<CAPTION>
                                                                                          December 31
                                                                      -----------------------------------------------------
                                                                           1997              1998               1999
                                                                      ---------------  -----------------   ----------------
     <S>                                                              <C>              <C>                 <C>
     Statutory tax rate:.............................................      51.4%              51.4%              47.7%
        Increase (reduction) in rate resulting from
           Different tax rates applied to
             foreign subsidiaries....................................      (6.7)              (1.4)              (3.5)
           Effect of change in normal
             statutory  tax rate in Japan............................         -                  -                2.3
           State income taxes, net of federal tax....................         -                  -               (1.1)
           Permanent difference......................................       0.8                4.5                2.5
           Amortization of deferred compensation
             related to stock warrants...............................         -               10.1                2.6
           Current tax on undistributed earnings.....................       3.8                5.1                  -
           Change in deferred tax valuation allowance................         -               10.3               (4.9)
           Tax effect on undistributed earnings in
             a subsidiary............................................      13.2                  -                  -
           Tax credit relating to research and development costs.....      (3.8)              (8.4)              (1.4)
           Operating loss of subsidiaries............................       1.2                3.6                  -
           Other.....................................................      (0.1)               1.1                2.0
                                                                      ---------        -----------         ----------
     Effective income tax rate.......................................      59.8%              76.3%              46.2%
                                                                      =========        ===========         ==========
</TABLE>

     The significant components of deferred income tax assets and liabilities at
December 31, 1998 and 1999 were as follows:

<TABLE>
<CAPTION>
                                                                                                          Thousands of
                                                                           Thousands of yen               U.S. dollars
                                                                 -------------------------------------  -----------------
                                                                             December 31                  December 31,
                                                                 -------------------------------------
                                                                       1998                1999               1999
                                                                 -----------------   -----------------  -----------------
<S>                                                              <C>                 <C>                <C>
Deferred tax assets:
Deferred revenue................................................ (Yen)   605,122     (Yen)   831,759    $         8,142
Allowance for doubtful accounts and sales returns ..............         100,872             134,971              1,321
Accrued enterprise tax..........................................         111,087              42,370                415
Accrued liabilities.............................................          69,073              76,150                745
Intercompany profit.............................................          79,398              52,932                518
Tax loss carry forward..........................................          14,551             126,731              1,241
Other...........................................................          35,293             118,033              1,155
                                                                 ---------------     ---------------    ---------------
   Gross deferred tax assets....................................       1,015,396           1,382,946             13,537
   Less:  Valuation allowance...................................        (212,051)            (10,465)              (102)
                                                                 ---------------     ---------------    ---------------
                                                                         803,345           1,372,481             13,435
                                                                 ---------------     ---------------    ---------------

Deferred tax liabilities
   Unrealized gain on debt and equity securities................        (214,681)           (173,811)            (1,701)
   Deferred compensation........................................         (56,693)                  -                  -
   Other........................................................          (7,584)                  -                  -
                                                                 ---------------     ---------------    ---------------
                                                                        (278,958)           (173,811)            (1,701)
                                                                 ---------------     ---------------    ---------------
Net deferred tax assets......................................... (Yen)   524,387     (Yen) 1,198,670    $        11,734
                                                                 ===============     ===============    ===============
</TABLE>

                                     F-29
<PAGE>

     Net deferred tax assets are included in the consolidated balance sheets as
follows:

<TABLE>
<CAPTION>
                                                                                                    Thousands of
                                                                    Thousands of yen                U.S. dollars
                                                         ---------------------------------------  -----------------
                                                                      December 31                   December 31
                                                         ---------------------------------------
                                                                1998                1999                1999
                                                         -------------------  ------------------  -----------------
<S>                                                      <C>                  <C>                 <C>
Current assets-Deferred income taxes...................     (Yen)394,922        (Yen)  922,061         $ 9,026
Other assets-Deferred income taxes.....................          129,465               276,609           2,708
                                                         -------------------  ------------------  -----------------
Net deferred tax assets................................     (Yen)524,387        (Yen)1,198,670         $11,734
                                                         ===================  ==================  =================
</TABLE>

     The valuation allowance mainly relates to deferred tax assets of
consolidated subsidiaries with operating loss carry forwards for tax purposes
that are not expected to be realized. The net changes in the total valuation
allowance for the years ended December 31, 1997, 1998 and 1999 were increase of
(Yen)9,048, (Yen)163,003 thousand and decrease of (Yen)201,586 thousand ($1,973
thousand), respectively.

     Operating loss carryforwards for tax purposes of a consolidated subsidiary
at December 31, 1999 amounted to approximately (Yen)499,041 thousand ($4,885
thousand) and are available as an offset against future taxable income of the
subsidiary. These carryforwards expire at various dates up to December 31, 2004.
Realization is dependent on such subsidiaries generating sufficient taxable
income prior to expiration of the loss carryforwards. Although realization is
not assured, management believes it is more likely than not that all of the
deferred tax assets, less valuation allowance, will be realized. The amount of
such net deferred tax assets considered realizable, however, could be changed in
the near term if estimates of future taxable income during the carry forward
period are changed.

     At December 31, 1999, no deferred income taxes have been provided on
undistributed earnings of foreign subsidiaries not expected to be remitted in
the foreseeable future totaling (Yen)1,060,648 thousand ($10,382 thousand), as
management of the Company intends to reinvest undistributed earnings of the
Company's foreign subsidiaries. The unrecognized deferred tax liabilities as of
December 31, 1999 for such temporary differences amounted to (Yen)237,668
thousand ($2,326 thousand).

17.  Shareholders' equity

     Changes in the number of shares of common stock outstanding have resulted
from the following:

<TABLE>
<CAPTION>
                                                                                             For the year ended
                                                                                                December 31
                                                                           -------------------------------------------------------
                                                                                 1997               1998               1999
                                                                           ----------------- ----------------- -------------------
Shares of common stock outstanding:
<S>                                                                        <C>               <C>               <C>
   Balance at beginning of year....................................            54,000,000        54,000,000          62,506,800
   New share offering..............................................                     -         7,500,000                   -
   Exercise of stock purchase warrants.............................                     -         1,006,800           2,336,100
                                                                           -----------------  -----------------   ----------------

   Balance at end of year..........................................            54,000,000        62,506,800          64,842,900
                                                                           =================  =================   ================
</TABLE>

                                      F-30
<PAGE>

     Based upon the board of directors' resolution on July 8, 1997, the Company
made a free share distribution of 12,000 shares to the shareholders of record on
September 1, 1997. This free distribution was made in the form of a stock split
in the ratio of three-for-one, for which the transfer of the applicable par
value of (Yen)202,425 thousand was made from additional paid-in capital to the
common stock account in accordance with the Japanese Commercial Code.

     On January 1, 1998, in order to reduce the par value of its common stock,
the former Trend Micro Incorporated merged into a dormant company, a
consolidated subsidiary named K.K. International Media ("Media") which then
changed its name to Trend Micro. At that time the par value of the Company's
common stock was reduced from (Yen)50,000 to (Yen)500 per share. The merger was
approved at the extraordinary shareholders' meeting on November 17, 1997, and
took effect as of January 1, 1998. As a result of the merger, common stock was
increased by (Yen)900,000 thousand, representing 1,800,000 shares at a par value
of (Yen)500. At the same time, 20,000 shares (par value (Yen)500) of Media which
were held by the Company were retired.

     As approved at an ordinary meeting of shareholders on March 28, 1998, each
share of the Company's (Yen)500 par value common stock was split into 10 shares
of par value (Yen)50 common stock.

     Also approved, an increase in the authorized number of shares from 7.2
million shares to 72 million shares.

     As approved at an ordinary meeting of shareholders on March 23,1999, the
authorized number of shares were increased from 72 million shares to 83 million
shares.

     Effective from August 18, 1998, the common stock of the Company was
registered for trading in the Japanese Over-the-Counter Market. Upon the
registration, 7,500,000 shares were issued based on the resolutions of the Board
of Directors on July 28, 1998. As a result, the common stock account and the
paid-in capital account of the Company increased by (Yen)4,038,078 thousand and
(Yen)6,175,578 thousand, respectively.

     Upon exercise of stock warrants, 1,006,800 shares of common stock at an
exercise price of (Yen)285 per share were issued and the common stock account
and the additional paid-in capital account of the Company increased by
(Yen)143,636 thousand and (Yen)146,170 thousand, respectively, in the year ended
1998.

     Upon exercise of stock warrants, 2,336,100 shares of common stock at an
exercise price of (Yen)285 per share were issued and the common stock account
and the additional paid-in capital account of the Company increased by
(Yen)332,946 thousand ($3,259 thousand) and (Yen)338,346 thousand ($3,311
thousand), respectively, in the year ended 1999.

     On August 19, 1999, the board of directors of the Company decided and
declared a stock split in the ratio of three-for-one for which the record date
was September 30, 1999. All per share data in the consolidated financial
statements have been adjusted to give effect to the stock split made on
September 30, 1999.

     Under the Japanese Commercial Code, at least 50% of the issue price of new
shares, with a minimum of the par value of those shares, is required to be
designated as common stock. The portion which is to be designated as common
stock is determined by resolution of the Board of Directors. Proceeds in excess
of the amounts designated as common stock are credited to additional

                                      F-31
<PAGE>

paid-in capital. The parent company may transfer portions of additional paid-in
capital to common stock by resolution of the Board of Directors.

     Under the Japanese Commercial Code, the amount available for dividends is
based on retained earnings as recorded on the books of the Company prepared in
accordance with Japanese Commercial Code requirements. However, certain
adjustments, not recorded on the Company's books, are reflected in the financial
statements as described in Note 2.

     The Japanese Commercial Code provides that an amount equal to at least 10%
of cash dividends and other distributions from retained earnings paid by the
parent company and its Japanese subsidiaries be appropriated as a legal reserve.
No further appropriation is required when the legal reserve equals 25% of stated
capital. The amounts of statutory retained earnings of the parent company
available for the payments of dividends to stockholders as of December 31, 1998
and 1999 were (Yen)2,052,378 thousand, (Yen)2,866,888 thousand ($28,063
thousand), respectively.

     According to the Articles of Incorporation of the Taiwan subsidiary, the
annual net income should be used initially to cover any accumulated deficit;
then, 10% of the remaining annual net income should be set aside as legal
reserve until it reaches 100% of contributed capital. Under the law in Taiwan,
the legal reserve can be exclusively used to cover accumulated deficits or, if
the balance of the reserve exceeds 50% of contributed capital, to increase
capital (not to exceed 50% of the reserve balance) and shall not be used for any
other purpose.

     When distributing retained earnings, the Taiwan subsidiary should
distribute 0.5% of the total distribution as an employee bonus. The distribution
of the retained earnings shall be made by a resolution passed by the Board of
Directors and approved by the shareholders.

     The Japanese Commercial Code permits a Company to distribute profits by way
of interim or year-end dividends under certain conditions. Year-end dividends of
(Yen)208,337 thousand ($2,040 thousand) for the year ended December 31, 1998
were approved at a general stockholders' meeting held on March 11 1999. Such
dividends are reflected in the accompanying consolidated financial statements
for the year ended December 31, 1999.

     Total accumulated other comprehensive income as of December 31, 1997, 1998
and 1999, which in each case was a net debit balance, was (Yen)82,752 thousand,
(Yen)43,924 thousand and (Yen)417,066 thousand ($4,081 thousand), respectively.

18.  Financial instruments

     Other than marketable debt and equity securities, the Company's involvement
in financial assets and liabilities with market risk is limited to cash and cash
equivalents, notes and accounts receivable, short-term borrowings, notes and
accounts payable and long-term debt. The Company has a policy not to utilize any
derivative financial instruments with off-balance sheet risk.

     At December 31, 1998 and 1999, the carrying amounts of the Company's
financial instruments approximated their fair values which were estimated based
on the discounted amounts of future cash flows.

                                      F-32
<PAGE>

19.  Advertising costs

     Advertising costs are expensed as incurred. Advertising costs included in
selling, general and administrative expenses were (Yen)1,192,109 thousand,
(Yen)1,540,715 thousand and (Yen)2,164,630 thousand ($21,189 thousand) for the
years ended December 31, 1997, 1998 and 1999, respectively.

20.  Leased assets

     Rental expenses under operating leases for the years ended December 31,
1997, 1998 and 1999 were (Yen)122,571 thousand, (Yen)292,214 thousand and
(Yen)422,727 thousand ($4,138 thousand), respectively. The minimum rental
payments required under operating leases that have initial or remaining
noncancelable lease terms in excess of one year at December 31, 1999 are as
follows:

                                                                Thousands of
     Year ending December 31:             Millions of yen       U.S. dollars
                                          ------------------  ----------------
       2000..............................     (Yen)272,138       $2,664
       2001..............................           40,146          393
       2002..............................           22,687          222
       2003..............................           12,591          123
                                          ------------------  ----------------
     Total minimum future lease payments.     (Yen)347,562       $3,402
                                          ==================  ================

21.  Commitments and contingent liabilities

     There were no significant commitments outstanding at December 31, 1999.

     In May 1997, Trend Micro Incorporated (TMI), the parent company's U.S.
subsidiary, sued Network Associates (formerly McAfee Associates, Inc.) and
Symantec in the U.S. Federal District Court for the Northern District of
California alleging that their products infringe TMI's U.S. Patent No. 5,623,600
relating to a system and method for detecting computer viruses in a network
environment and seeking injunctive relief and unspecified money damages. TMI
settled its claims against Symantec in April 1998 by entering into a patent
cross-license arrangement, which included an agreement to exchange certain virus
samples. In June 1997, Network Associates denied infringement, alleging the
Company's patent is invalid, and filed counterclaims against TMI alleging unfair
competition, false advertising, trade libel and interference with prospective
economic advantage. In April 2000, Network Associates filed suit against TMI in
the U.S. Federal District Court for the Northern District of Texas, alleging
that TMI's anti-virus software packages, including the Trend Virus Control
System, infringes a Network Associates patent which was issued on February 22,
2000. The Company believes that the final disposition of these matters will not
have a material adverse effect on the Company's business, financial condition or
results of operations at this time.

     TMI is currently in negotiations with Network Associates to settle all
outstanding litigation between the parties. The Company expects to reach
agreement with Network Associates on terms that are acceptable to the Company.

22.  Segment information

     The Company operates in the microcomputer software industry business
segment. Net revenue is attributed to countries based on location of the Company
and consolidated subsidiaries and long-lived assets for the years ended December
31, 1997, 1998 and 1999 are as follows:

                                      F-33
<PAGE>

         Geographic information -

<TABLE>
<CAPTION>
                                                                                                         Thousands of
                                                                Thousands of yen                         U.S. dollars
                                          ----------------------------------------------------------   -----------------
                                                                                                          Year ended
                                                           Year ended December 31                         December 31,
                                          ----------------------------------------------------------
                                                 1997                1998               1999                 1999
                                          -------------------  ------------------ ------------------   -----------------
<S>                                       <C>                  <C>                <C>                  <C>
Net sales to external customers:
   Japan..............................    (Yen)  3,698,835       (Yen) 4,811,608   (Yen)  5,847,188        $    57,236
   U.S.A..............................           1,061,159             1,866,747          3,830,589             37,496
   Taiwan.............................           1,830,838             1,808,742          1,646,550             16,117
   Europe.............................             427,781               813,962          1,825,699             17,871
   Other..............................             379,366               444,605            483,144              4,729
                                          ----------------       ---------------    ---------------        -----------
        Total.........................           7,397,979       (Yen) 9,745,664   (Yen) 13,633,170        $   133,449
                                          ================       ===============    ===============        ===========
Long-lived assets:
   Japan..............................             334,255       (Yen)   884,543    (Yen) 1,002,116        $     9,809
   U.S.A..............................             130,216               147,469            320,497              3,137
   Taiwan.............................             209,499               204,672            248,637              2,434
   Europe.............................              38,355                38,333             52,779                517
   Other..............................              31,506                39,016             27,133                265
                                          ----------------       ---------------    ---------------        -----------
        Total.........................    (Yen)    743,831       (Yen) 1,314,033    (Yen) 1,651,162        $    16,162
                                          ================       ===============    ===============        ===========
</TABLE>


     Intercompany sales between geographic areas are made at arms-length prices.
Long-lived assets are those assets used in the geographic segment.

     Long-lived assets are included in the consolidated balance sheets as
follows:

<TABLE>
<CAPTION>
                                                                                                         Thousands of
                                                                Thousands of yen                         U.S. dollars
                                          ----------------------------------------------------------   -----------------
                                                                                                          Year ended
                                                           Year ended December 31                         December 31,
                                          ----------------------------------------------------------
                                                 1997                1998               1999                 1999
                                          -------------------  ------------------  -----------------   -----------------
<S>                                       <C>                  <C>                 <C>                 <C>
Investments and other assets::
   Intangibles..........................  (Yen)    260,759     (Yen)  438,366      (Yen)  440,252      $     4,309
   Other................................           130,304            380,253             461,125            4,514
 Property and equipment, less
   accumulated depreciation.............           352,768            495,414             749,785            7,339
                                          ----------------     --------------      --------------      -----------
        Tota1...........................  (Yen)    743,831     (Yen)1,314,033      (Yen)1,651,162      $    16,162
                                          ================     ==============      ==============      ===========
</TABLE>

     Significant customers

     SOFTBANK and its affiliates accounted for more than 10% of net sales to
external customers for the years ended December 31, 1997, 1998 and 1999. Net
sales to SOFTBANK and its affiliates for the years ended December 31, 1997, 1998
and 1999 were (Yen)1,383,730 thousand, (Yen)2,386,654 thousand and
(Yen)2,453,538 thousand ($24,017 thousand), respectively.

                                      F-34
<PAGE>

23.  Subsequent events

     Establishment of ipTrend Incorporated, new subsidiary

On January 18, 2000, the Company established a new wholly-owned subsidiary in
Japan with an initial capital of (Yen)490,000 thousand ($4,796 thousand), named
ip Trend Incorporated (ipTrend). Subsequently, on February 24, 2000, the Company
increased its investment in ip Trend by (Yen)1,510,000 thousand ($14,781
thousand). The Company intends to extend its business to the area of UNIX and
Linux as an internet-based technology through ip Trend, which will manufacture
and sell computer software for internet-based technology and provides related
services.

     Acquisition of the shares of Nihon Unisoft Incorporated

On February 29, 2000, the Company completed the acquisition of 1,600 shares
(66.7%) of outstanding shares of Nippon Unisoft through ipTrend Inc., a wholly-
owned subsidiary of the Company. Nippon Unisoft Incorporated, which has annual
sales of approximately (Yen)1,484 millions ($14,546 thousand), has been a
Japanese Unix software solution provider in the networking communications and
Internet domain since November 1, 1983. The purpose of the acquisition is to
develop the internet-based technology and to expand the sales of the products
and services used by that technology. The acquisition will be accounted for as a
purchase. As such, the excess of the purchase price over the fair value of the
acquired net assets, which approximates (Yen)239,567 thousand ($2,345 thousand),
will be recorded as goodwill of (Yen)1,360,433 thousand ($13,317).

Unaudited pro forma information related to this acquisition is not included as
the impact of this acquisition is not deemed to be material.

                                      F-35
<PAGE>

                                                                     SCHEDULE II

                           TREND MICRO INCORPORATED
                         AND CONSOLIDATED SUBSIDIARIES

                       VALUATION AND QUALIFYING ACCOUNTS

<TABLE>
<CAPTION>
                                                                            Thousands of yen
                                         ----------------------------------------------------------------------------------------
                                                           Additions
                                          Balance at      charged to      Additions                                     Balance at
                                           beginning       costs and      charged to      Deductions        Other         end of
                                           of period       expenses       net sales        (Note 1)       (Note 2)        period
                                         ------------    -------------- --------------  --------------- -------------- -------------
<S>                                      <C>             <C>            <C>             <C>             <C>            <C>
Year ended December 31, 1997:

   Allowance for doubtful
     accounts and sales returns.......   (Yen) 76,818    (Yen)  97,973  (Yen) 35,787   (Yen)   (6,325)  (Yen)    492   (Yen) 204,745
                                         ============    =============  ============   ==============   ============   =============
Year ended December 31, 1998:
   Allowance for doubtful
     accounts and sales returns.......   (Yen)204,745    (Yen) 192,922  (Yen) 22,227   (Yen)  (52,657)  (Yen)(28,356)  (Yen) 338,881
                                         ============    =============  ============   ==============   ============   =============
Year ended December 31, 1999:
   Allowance for doubtful
     accounts and sales returns.......   (Yen)338,881    (Yen)  97,102  (Yen)145,099   (Yen) (151,716)  (Yen)(46,393)  (Yen) 382,973
                                         ============    =============  ============   ==============   ============   =============
</TABLE>

Notes:   1.   Amounts written off.
         2.   Translation adjustment.


<TABLE>
<CAPTION>
                                                                            Thousands of yen
                                            ---------------------------------------------------------------------------------
                                              Balance at
                                             beginning of                                                       Balance at
                                                period           Additions        Deductions        Other      end of period
                                            ----------------  ----------------  ---------------  ------------  --------------
<S>                                         <C>               <C>               <C>              <C>           <C>
Year ended December 31, 1997:
   Valuation allowance
      - Deferred tax assets............     (Yen)        -    (Yen)    49,048   (Yen)        -   (Yen)      -  (Yen)   49,048
                                            ==============    ===============   ==============   ============  ==============
Year ended December 31, 1998:
   Valuation allowance
      - Deferred tax assets............     (Yen)   49,048    (Yen)   188,819   (Yen)        -   (Yen)(25,816) (Yen)  212,051
                                            ==============    ===============   ==============   ============  ==============
Year ended December 31, 1999:
   Valuation allowance
      - Deferred tax assets............     (Yen)  212,051    (Yen)         -   (Yen) (198,599)  (Yen) (2,987) (Yen)   10,465
                                            ==============    ===============   ==============   ============  ==============
</TABLE>

                                      F-36
<PAGE>

                           Trend Micro Incorporated


                               810,000 Shares of
                                 Common Stock




                          __________________________

                                  PROSPECTUS
                          __________________________






                                 May 24, 2000



- --------------------------------------------------------------------------------

     We have not authorized any dealer, salesperson or other person to give you
written information other than this prospectus or to represent anything not
contained in this prospectus. You must not rely on any unauthorized information
or representations. We are not making an offer to sell the shares and ADSs
offered hereby in any jurisdiction where the offer or sale is not permitted. The
information contained in this prospectus is current only as of its date.


- --------------------------------------------------------------------------------
<PAGE>

                                    PART II

                    INFORMATION NOT REQUIRED IN PROSPECTUS

Item 13.  Other Expenses of Issuance and Distribution

     The expenses to be paid by Trend Micro in connection with the distribution
of the securities being registered, other than underwriting discounts and
commissions, are as follows. All of the amounts shown are estimates except for
the SEC registration fee:

                                                             Amount
                                                             ------

     SEC Registration Fee.................................  $ 12,425
     Legal Fees and Expenses..............................   100,000
     Accounting Fees and Expenses.........................    50,000
     Option Agent, Transfer Agent and Registrar Fees
      and Expenses........................................    10,000
     Miscellaneous Expenses...............................     7,575
                                                               -----
          Total...........................................  $180,000
                                                            ========

     Trend Micro will pay the costs and expenses in connection with the shares
to be sold by STG Incentive Company L.L.C.

Item 14.  Indemnification of Directors and Officers

     Articles 254 and 280 of the Commercial Code of Japan make the provisions of
Section 10, Chapter 2, Book III of the Civil Code applicable to the relationship
between Trend Micro and its directors and statutory auditors, respectively.
Section 10, among other things, provides in effect that:

          (1)  Any director or statutory auditor of a company may demand advance
     payment of expenses which are considered necessary for the management of
     the affairs of such company entrusted to him;

          (2)  If a director or a statutory auditor of a company has defrayed
     any expenses which are considered necessary for the management of the
     affairs of such company entrusted to him, he may demand reimbursement
     therefor from the company;

          (3)  If a director or a statutory auditor has assumed an obligation
     necessary for the management of the affairs entrusted to him, he may
     require the company to perform in his place or, if it is not due, to
     furnish adequate security; and

          (4)  If a director or a statutory auditor, without any fault on his
     part, sustains damage through the management of the affairs entrusted to
     him, he may demand compensation therefor from the company.

     Trend Micro has entered into agreements with its directors and certain of
its executive officers that require Trend Micro to indemnify such persons
against expenses (including attorneys' fees), judgments, fines, settlements and
other amounts actually and reasonably incurred (including expenses of a
derivative action) in connection with any proceeding, whether actual or
threatened, to which any such person may be made a party by reason of the fact
that such person is or was a director or officer of Trend Micro or any of its
affiliated enterprises, provided such person acted in good faith and in a manner
such person reasonably believed to be in or not opposed to the best interests of
the Registrant. Indemnification may not be available for certain violations of
U.S. federal securities law or actions brought under Japanese law and may be
determined by the United States or Japanese courts to be unenforceable in such
circumstances.

Item 15.  Recent Sales of Unregistered Securities

     For the period from January 1, 1996 to December 31, 1998, Trend Micro has
sold unregistered securities as set forth below. The consideration paid to Trend
Micro in each case was cash, unless otherwise indicated below. Share amounts and
prices per share below are adjusted to reflect a one-into-three stock split
effected on September 1, 1997, and a one-into-ten stock split effected on May 7,
1998.

     On October 15, 1996, Trend Micro issued and sold 54,000 shares at a per
share price of approximately (Yen)7,833, in a subscription rights offering to
existing shareholders. In such offering, each shareholder was entitled to
purchase three shares for each share. Exemption is claimed under Regulation S
under the Securities Act.
<PAGE>

     On November 21, 1996, Trend Micro issued and sold 54,000 shares at a per
share price of approximately (Yen)8,242, in a subscription rights offering to
existing shareholders. In such offering, each shareholder was entitled to
purchase three shares for every four shares then owned. Exemption is claimed
under Regulation S under the Securities Act.

     On November 25, 1996, Trend Micro issued and sold 54,000 shares at a per
share price of approximately (Yen)8,242, in a subscription rights offering to
existing shareholders. In such offering, each shareholder was entitled to
purchase three shares for every seven shares then owned. Exemption is claimed
under Regulation S under the Securities Act.

     On October 17, 1997, Trend Micro issued unsecured bonds with detachable
warrants to purchase an aggregate of 1,062,600 shares to certain employees and
directors pursuant to the Trend Micro 1997 incentive plan. Exemption is claimed
under Regulation S and Rule 701 under the Securities Act.

     In order to effect a 1-into-100 stock split, on January 1, 1998, Trend
Micro merged with and into International Media K.K., a Japanese corporation
("International Media"). In the merger, 100 shares of International Media were
exchanged for each outstanding share. Concurrently with such exchange, the
corporate name of International Media was changed to "Trend Micro Incorporated."
The issuance of such shares did not involve a "sale" of securities and,
therefore, registration was not required.

     On April 15, 1998, Trend Micro issued unsecured bonds with detachable
warrants to purchase an aggregate of 483,000 shares to certain employees and
directors under the Trend Micro 1998 incentive plan. Exemption is claimed under
Regulation S and Rule 701 under the Securities Act.

     On June 17, 1998, Trend Micro issued unsecured bonds with detachable
warrants to purchase an aggregate of 230,000 shares to certain employees and
directors pursuant to the Trend Micro 1998 incentive plan. Exemption is claimed
pursuant to Regulation S and Rule 701 under the Securities Act.

     On August 18, 1998, Trend Micro issued and sold 2,500,000 shares in its
initial public offering in Japan in an underwriting. The offering was managed by
The Nomura Securities Co., Daiwa Securities, Nikko Securities, Merrill Lynch &
Co. and four other underwriters. The aggregate initial offering price and the
aggregate underwriting commission were (Yen)10,750,000,000 and (Yen)537,500,000,
respectively. Exemption is claimed under Regulation S under the Securities Act.

     From time to time since September 1998 through April 2000, Trend Micro
issued 3,596,175 shares upon the exercise of warrants under the Trend Micro
1997, 1998 and 1999 incentive plans. Exemption is claimed under Regulation S and
Rule 701 under the Securities Act.
<PAGE>

Item 16.  Exhibits and Financial Statement Schedules

     (a) Exhibits

<TABLE>
<CAPTION>
  Exhibit                                                                                                      Sequentially
   Number                                             Document                                                 Numbered Page
============     =================================================================================       =======================
<S>              <C>                                                                                     <C>
    3.1           Articles of Incorporation of Trend Micro
    3.3+          Regulations of the Board of Directors
    4.1+          Form of Deposit Agreement among Trend Micro, The Bank of New York, as
                  Depositary, and the owners and holders of American Depositary Receipts
                  (including the Form of ADR)
    4.2+          Share Handling Regulations
    5.1*          Opinion and Consent of Mitsui, Yasuda, Wani & Maeda
    8.1*          Tax Opinion of Mitsui, Yasuda, Wani & Maeda (included in Exhibit 5.1)
    8.2*          Tax Opinion of Morrison & Foerster LLp
   10.1+          Translation summary of Lease Agreement dated March 4, 1998, between Trend
                  Micro Incorporated and Odakyu Dentetsu K.K.
   10.2+          Lease Agreement dated July 8, 1997, between Trend Micro, Inc. and Hidalgo, Inc.
   10.3+          1997 incentive plan and related agreements
   10.4+          April 1998 incentive plan and related agreements
   10.5+          June 1998 incentive plan and related agreements
   10.6*          1999 incentive plan and related agreements
   10.7+          Form of Indemnification Agreement between Trend Micro and directors and
                  officers
   10.8++         Translation Summary of bond and warrant to be issued in connection with 1999
                  incentive plan
   10.9+++        Basic Agreement on Continual Sale and Purchase of Goods dated October 1, 1999,
                  between Trend Micro Incorporated and SOFTBANK COMMERCE CORP., and related
                  agreements
   10.10          Agreements relating to Acquisition of Nihon Unisoft Corporation
   11.1+          Statement regarding calculation of net income (loss) per share
   21.1           Subsidiaries of the Registrant
   23.1*          Consent of Mitsui, Yasuda, Wani & Maeda (included in Exhibit 5.1)
   23.2*          Consent of Morrison & Foerster LLP (included in Exhibit 8.2)
   23.3           Consent of PricewaterhouseCoopers
   24.1           Power of Attorney (included in Page II-5).
</TABLE>



+    Incorporated by reference to the corresponding exhibit to the Company's
     Form F-1 Registration Statement (File No. 333-10486) filed on June 22,
     1999.
++   Incorporated by reference to the corresponding exhibit to the Company's
     Amendment No. 2 to the Form F-1 Registration Statement (File No. 333-10486)
     filed on July 2, 1999.
+++  Confidential Treatment  being requested for a portion of these documents.
*    Incorporated by reference to the corresponding exhibit to the Company's
     Form F-1 Registration Statement (File No. 333-10586) filed on July 8, 1999.
<PAGE>

(b) Financial Statement Schedules

     Schedule II - Valuation and Qualifying Accounts

     Schedules other than those listed above have been omitted since they are
not required or are not applicable or the required information is shown in the
financial statements or related notes.

Item 17.  Undertakings

     The Registrant hereby undertakes:

     (1)  To file, during any period in which offers or sales are being made, a
post-effective amendment to this registration statement:

          (i)    To include any prospectus required by Section 10(a)(3) of the
     Securities Act of 1933;

          (ii)   To reflect in the prospectus any facts or events arising after
     the effective date of the registration statement (or the most recent post-
     effective amendment thereof) which, individually or in the aggregate,
     represent a fundamental change in the information set forth in the
     registration statement;

          (iii)  To include any material information with respect to the plan of
     distribution not previously disclosed in the registration statement or any
     material change to such information in the registration statement.

     (2)  That, for purposes of determining any liability under the Securities
Act of 1933, each post-effective amendment shall be deemed to be a new
registration statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial bona
fide offering thereof.

     (3)  To remove from registration by means of a post-effective amendment any
of the securities being registered which remain unsold at the termination of the
offering.

     (4)  To file a post-effective amendment to the registration statement to
include any financial statements required by Rule 3-19 of Regulation S-X
throughout this continuous offering.

     (5)  Insofar as indemnification for liabilities arising under the
Securities Act of 1933 may be permitted to directors, officers and controlling
persons of the registrant pursuant to the foregoing provisions, or otherwise,
the registrant has been advised that in the opinion of the Securities and
Exchange Commission such indemnification is against public policy as expressed
in the Act and is, therefore, unenforceable. In the event that a claim for
indemnification against such liabilities (other than the payment by the
registrant of expenses incurred or paid by a director, officer or controlling
person of the registrant in the successful defense of any action, suit or
proceeding) is asserted by such director, officer or controlling person in
connection with the securities being registered, the registrant will, unless in
the opinion of its counsel the matter has been settled by controlling precedent,
submit to a court of appropriate jurisdiction the question whether such
indemnification by it is against public policy as express in the Act and will be
governed by the final adjudication of such issue.

     The Registrant hereby undertakes that:

     (1)  For purposes of determining any liability under the Securities Act of
1933, the information omitted from the form of prospectus filed as part of this
registration statement in reliance upon Rule 430A and contained in a form of
prospectus filed by the issuer pursuant to Rule 424(b)(1) or (4) or 497(h) under
the Securities Act shall be deemed to be part of this registration statement as
of the time it was declared effective.

     (2)  For the purpose of determining any liability under the Securities Act
of 1933, each post-effective amendment that contains a form of prospectus shall
be deemed to be a new registration statement relating to the securities offered
therein, and the offering of such securities at that time shall be deemed to be
the initial bona fide offering thereof.
<PAGE>

                                   SIGNATURES

     Pursuant to the requirements of the Securities Act of 1933, as amended, the
registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form F-1 and has duly caused this Amendment to
the Registration Statement to be signed on its behalf by the undersigned,
thereunto duly authorized, in the City of Tokyo, Japan on the 24th day of May,
2000.

                                   Trend Micro Incorporated



                                   By:  /s/ CHANG MING-JANG
                                      -----------------------
                                   Name:    Chang Ming-Jang
                                   Title:   Representative Director;
                                            President, Chief Executive Officer
                                            and Chairman of the Board
                                            (Principal Executive Officer)


                               POWER OF ATTORNEY

     KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature
appears below does hereby constitute and appoint Chang Ming-Jang, Lai Kwok-To
and Hiroyuki Nakanishi, and each of them, as his true and lawful attorneys-in-
fact and agents, each with full power of substitution and resubstitution, for
him and in his name, place and stead, in any and all capacities, to sign any and
all amendments (including post-effective amendments) to this Registration
Statement and sign any registration statement for the same offering covered by
this Registration Statement that is to be effective upon filing pursuant to Rule
462(b) promulgated under the Securities Act of 1933, as amended and all post-
effective amendments thereto and to file the same, with all exhibits thereto,
and other documents in connection therewith, with the Securities and Exchange
Commission, granting unto said attorneys-in-fact and agents, and each of them,
full power and authority to do and perform each and every act and thing
requisite and necessary to be done in connection therewith and about the
premises, as fully to all intents and purposes as he might or could do in
person, hereby ratifying and confirming all that said attorneys-in-fact and
agents, or any of them, or their or his substitute or substitutes, may lawfully
do or cause to be done by virtue hereof.

     Pursuant to the requirements of the Securities Act of 1933, as amended,
this Amendment to the Registration Statement has been signed by the following
persons in the capacities and on the dates indicated:

<TABLE>
<CAPTION>
            Signature                                         Title                                        Date
            ---------                                         -----                                        ----
<S>                                   <C>                                                               <C>
     /s/  CHANG MING-JANG             Representative Director; President, Chief Executive               May 24, 2000
- ---------------------------------
           Chang Ming-Jang            Officer and Chairman of the Board
                                      Principal Executive Officer)

                                      Director and Authorized
- ---------------------------------
           Lai Kwok-To                Representative in the United States                               May   , 2000


     /s/  YOSHITAKA KITAO             Director
- ---------------------------------
           Yoshitaka Kitao                                                                              May 24, 2000

     /s/  HIROYUKI NAKANISHI          Director and Chief Executive Officer
- ---------------------------------                                                                       May 24, 2000
           Hiroyuki Nakanishi

     /s/  TOSHIHIRO WATANABE          Director
- ---------------------------------                                                                       May 24, 2000
           Toshihiro Watanabe

                                      Director, Chief Technology Officer
- ---------------------------------
             Chen Yi-Fen              and Executive Vice President                                      May   , 2000
</TABLE>
<PAGE>

                                 EXHIBIT INDEX

<TABLE>
<CAPTION>
  Exhibit                                                                                          Sequentially
   Number                                        Document                                          Numbered Page
=============    =============================================================================     =============
<S>              <C>                                                                               <C>
      3.1        Articles of Incorporation of Trend Micro

      3.3+       Regulations of the Board of Directors

      4.1+       Form of Deposit Agreement among Trend Micro, The Bank of New York, as
                 Depositary, and the owners and holders of American Depositary Receipts
                 (including the Form of ADR)

      4.2+       Share Handling Regulations

      5.1*       Opinion and Consent of Mitsui, Yasuda, Wani & Maeda

      8.1*       Tax Opinion of Mitsui, Yasuda, Wani & Maeda (included in Exhibit 5.1)

      8.2*       Tax Opinion of Morrison & Foerster LLP

     10.1+       Translation summary of Lease Agreement dated March 4, 1998, between Trend
                 Micro Incorporated and Odakyu Dentetsu K.K.

     10.2+       Lease Agreement dated July 8, 1997, between Trend Micro, Inc. and Hidalgo, Inc.

     10.3+       1997 incentive plan and related agreements

     10.4+       April 1998 incentive plan and related agreements

     10.5+       June 1998 incentive plan and related agreements

     10.6*       1999 incentive plan and related agreements

     10.7+       Form of Indemnification Agreement between Trend Micro and directors and
                 officers

     10.8++      Translation Summary of bond and warrant to be issued in connection with 1999
                 incentive plan

     10.9+++     Basic Agreement on Continual Sale and Purchase of Goods dated October 1, 1999,
                 between Trend Micro Incorporated and SOFTBANK COMMERCE CORP., and related
                 agreements

     10.10       Agreements relating to Acquisition of Nihon Unisoft Corporation

     11.1+       Statement regarding calculation of net income (loss) per share

     21.1        Subsidiaries of the Registrant

     23.1*       Consent of Mitsui, Yasuda, Wani & Maeda (included in Exhibit 5.1)

     23.2*       Consent of Morrison & Foerster LLP (included in Exhibit 8.2)

     23.3        Consent of PricewaterhouseCoopers

     24.1        Power of Attorney (included in Page II-5).
</TABLE>
______________________________

+    Incorporated by reference to the corresponding exhibit to the Company's
     Form F-1 Registration Statement (File No. 333-10486) filed on June 22,
     1999.
++   Incorporated by reference to the corresponding exhibit to the Company's
     Amendment No. 2 to the Form F-1 Registration Statement (File No. 333-10486)
     filed on July 2, 1999.
+++  Confidential treatment being requested for a portion of these documents.
*    Incorporated by reference to the corresponding exhibit to the Company's
     Form F-1 Registration Statement (File No. 333-10586) filed on July 8, 1999.

<PAGE>

                                                                     EXHIBIT 3.1

                                 (Translation)



                       ---------------------------------
                           ARTICLES OF INCORPORATION
                       ---------------------------------





                                    Trend Micro, Incorporated

                                    Established: March 19, 1965
                                    Partially Amended: March 13, 1996
                                    Partially Amended: October 24, 1997
                                    Partially Amended: January 1, 1998
                                    Partially Amended: May 7, 1998
<PAGE>

                           ARTICLES OF INCORPORATION

                                   Contents

<TABLE>
<CAPTION>
                                                                           PAGE
                                                                           ----
<S>                                                                        <C>
Article 1.   Corporate Name...............................................  3
Article 2.   Purposes.....................................................  3
Article 3.   Location of Head Office......................................  3
Article 4.   Method of Placing Public Notice..............................  3
Article 5.   Total Number of Shares to be Issued..........................  4
Article 6.   Par Value of Par-value Shares................................  4
Article 7.   Number of Shares Constituting One Unit.......................  4
Article 8.   Transfer Agent...............................................  4
Article 9.   Share Handling Regulations...................................  4
Article 10.  Record Date..................................................  5
Article 11.  Amortization of stock by Directors' resolution...............  5
Article 12.  Convocation..................................................  5
Article 13.  Chairman.....................................................  5
Article 14.  Method of Resolution.........................................  5
Article 15.  Exercise of Voting Rights by Proxy...........................  6
Article 16.  Minutes......................................................  6
Article 17.  Number of Directors..........................................  6
Article 18.  Election of Directors........................................  6
Article 19.  Term of Office of Directors..................................  6
Article 20.  Convocation and Chairman of the Board of Directors...........  7
Article 21.  Directors with Special Titles................................  7
Article 22.  Representative Directors.....................................  7
Article 23.  Method of Resolution of the Board of Directors...............  7
Article 24.  Minutes of the Board of Directors............................  7
Article 25.  Regulations of the Board of Directors........................  7
Article 26.  Remuneration and Retirement Allowances of Directors..........  7
Article 27.  Number of Statutory Auditors.................................  8
Article 28.  Election of Statutory Auditors...............................  8
Article 29.  Term of Office of Statutory Auditors.........................  8
Article 30.  Standing Statutory Auditor...................................  8
Article 31.  Notice of Convocation of Meetings of the Board of Statutory
             Auditors.....................................................  8
</TABLE>

                                       i
<PAGE>

<TABLE>
<S>                                                                        <C>
Article 32.  Method of Resolution of the Board of Statutory Auditors......  8
Article 33.  Minutes of the Board of Statutory Auditors...................  8
Article 34.  Regulations of the Board of Statutory Auditors...............  9
Article 35.  Remuneration and Retirement Allowances of Statutory Auditors.  9
Article 36.  Fiscal Year..................................................  9
Article 37.  Dividends....................................................  9
Article 38.  Interim Dividends............................................  9
Article 39.  Conversion of Convertible Bonds and Dividends or Interim
              Dividends Thereon...........................................  9
Article 40.  Prescription Period of Dividends.............................  9
</TABLE>

                                      ii
<PAGE>

                           ARTICLES OF INCORPORATION
                                      OF
                           TREND MICRO INCORPORATED

                                   CHAPTER I
                              GENERAL PROVISIONS

ARTICLE 1.  Corporate Name

     The corporate name of the Company shall be "Trend Micro Kabushiki Kaisha"
and in English it shall be "Trend Micro, Incorporated."

ARTICLE 2.  Purposes

     The purposes of the Company shall be to engage in the following businesses:

     1.     Manufacture, sale, import and export of electronic components;

     2.     Manufacture, sale, import and export of household electric
            appliances;

     3.     Manufacture, sale, import and export of communications equipment;

     4.     Manufacture, sale, import and export of medical equipment;

     5.     Design, sale, import and export of computer software;

     6.     Design, sale, import and export of computer hardware and related
            products; and,

     7.     Any other business incidental to any of the preceding items.

ARTICLE 3.  Location of Head Office

     The head office of the Company shall be located in Shibuya-ku, Tokyo.

ARTICLE 4.  Method of Placing Public Notice

     Public notices of the Company shall be placed in the Nihon Keizai Shimbun.

                                  CHAPTER II
                                    SHARES

ARTICLE 5.  Total Number of Shares to be Issued

     The total number of shares to be issued by the Company shall be two hundred
and fifty million (250,000,000). However, in the event stock is amortized, this
shall be reduced by the corresponding number of shares.
<PAGE>

ARTICLE 6.  Par Value of Par-value Shares

     The par value of each par-value share issued by the Company shall be fifty
Japanese yen ((Yen)50).

ARTICLE 7.  Number of Shares Constituting One Unit

     The number of shares constituting one unit of the Company shall be five
hundred (500).

ARTICLE 8.  Transfer Agent

     1.     The Company shall appoint a transfer agent in respect of its shares.

     2.     The transfer agent and its business handling office shall be
            determined by resolution of the Board of Directors.

     3.     The register of shareholders (including register of beneficial
            shareholders, likewise hereinafter) of the Company shall be kept at
            the business handling office of the transfer agent, and the Company
            shall cause the transfer agent to handle registration of transfer of
            shares, the take up of shares not constituting one unit, the receipt
            of beneficial shareholders' notices and any other business
            pertaining to the shares and the Company itself shall not handle
            these matters.

ARTICLE 9.  Share Handling Regulations

          The denominations of share certificates of the Company, registration
of transfer of shares, take up of shares not constituting one unit, receipt of
beneficial shareholders' notices and any other matters concerning shares and
share handling fees shall be governed by the Share Handling Regulations
established by resolution of the Board of Directors.

ARTICLE 10. Record Date

     1.     The shareholders (including beneficial shareholders, likewise
hereinafter) appearing in the final register of shareholders of the Company as
of the last day of each fiscal year shall be entitled to exercise their rights
at the ordinary general meeting of shareholders relating to the relevant
accounts.

     2.     In addition to the preceding paragraph, the Company may, if
necessary, determine the shareholders or registered pledgees appearing in the
final register of shareholders as of a certain date to be entitled to exercise
their rights by giving prior public notice in accordance with a resolution of
the Board of Directors.
<PAGE>

ARTICLE 11. Amortization of stock by Directors' resolution

     1.     After March 11, 1999, by a resolution of Board of Directors the
Company may use its profit to buy back and amortize a maximum of 800,000 shares
of its own stock.

     2.     In addition to the preceding paragraph, after March 11, 1999, by a
resolution of Board of Directors the Company may use its capital reserve to buy
back and amortize its own stock to a maximum of 4,000,000 shares or shares
corresponding to a maximum total purchase price of 5.5 billion yen.

                                  CHAPTER III
                        GENERAL MEETING OF SHAREHOLDERS

ARTICLE 12. Convocation

          An ordinary general meeting of shareholders of the Company shall be
convened in March each year and an extraordinary general meeting of shareholders
may be convened whenever necessary.

ARTICLE 13. Chairman

          The chairman of a general meeting of shareholders shall be a person
selected in advance from the Company's directors, shareholders employees or
advisory counsel by Board of Directors.  When such person is unable to so act,
another person determined in accordance with an order predetermined by
resolution of the Board of Directors shall act as chairman.

ARTICLE 14. Method of Resolution

          Unless otherwise provided by laws and ordinances or these Articles of
Incorporation, resolutions of general meeting of shareholders shall be adopted
by a majority vote of the voting rights of shareholders present at the meeting.

ARTICLE 15. Exercise of Voting Rights by Proxy

     1.     A shareholder may exercise his/her voting rights through a proxy who
is also a shareholder of the Company having voting rights.

     2.     In case of the preceding paragraph, the proxy shall be required to
file with the Company a document evidencing his/her authority each time he/she
acts as proxy.

ARTICLE 16. Minutes

          The substance of proceedings at a general meeting of shareholders and
the results thereof shall be recorded in the minutes of the meeting which shall
bear the names and seals of the chairman and the directors present thereat.
<PAGE>

                                  CHAPTER IV
                     DIRECTORS AND THE BOARD OF DIRECTORS

ARTICLE 17. Number of Directors

          The Company shall have not more than eight (8) directors.

ARTICLE 18. Election of Directors

     1.     Directors of the Company shall be elected at a general meeting of
shareholders.

     2.     Resolution for election of directors shall be adopted by a majority
vote at a general meeting of shareholders at which shareholders who hold shares
representing one-third (1/3) or more of the total number of issued shares with
voting rights are present.

     3.     With respect to the resolution for election of directors, cumulative
voting shall not be adopted.

ARTICLE 19. Term of Office of Directors

     1.     The term of office of directors shall expire at the conclusion of
the ordinary general meeting of shareholders with respect to the last closing of
accounts within two (2) years after their assumption of office.

     2.     The term of office of any director elected to fill a vacancy due to
early retirement shall be the same as the remainder of the term of office of the
retired director.

     3.     The term of office of any director elected due to increase in number
of directors shall be the same as the remainder of the term of office of the
other directors in office.

ARTICLE 20. Convocation and Chairman of the Board of Directors

     1.     The President and Director shall convene and act as chairman of the
Board of Directors. When the President and Director is unable to so act, one of
the other directors determined in accordance with an order predetermined by the
Board of Directors shall act in his/her place.

     2.     Notice of convocation of a meeting of the Board of Directors shall
be sent to each director and statutory auditor at least three (3) days prior to
the date set for such meeting; provided, however, that in case of urgency such
period may be shortened.

ARTICLE 21. Directors with Special Titles

     By resolution of the Board of Directors, the Company may, from among the
Directors, appoint one President and Director and, if necessary, one or more
Vice President and Directors, Senior Managing Directors and Managing Directors.
<PAGE>

ARTICLE 22. Representative Directors

     1.     The President and Director shall represent the Company and control
the business of the Company.

     2.     By resolution of the Board of Directors, the Company may elect the
director who represents the Company from among the directors with special titles
provided in the preceding Article.

ARTICLE 23. Method of Resolution of the Board of Directors

     Resolution of the Board of Directors shall be adopted by a majority of the
directors present at a meeting at which majority of the directors are present.

ARTICLE 24. Minutes of the Board of Directors

     The substance of proceedings at a meeting of the Board of Directors and the
results thereof shall be recorded in the minutes of the meeting which shall bear
the names and seals of the directors and statutory auditors present thereat.

ARTICLE 25. Regulations of the Board of Directors

     Matters concerning the Board of Directors shall be governed by the
Regulations of the Board of Directors established by resolution of the Board of
Directors in addition to laws and ordinances and these Articles of
Incorporation.

ARTICLE 26. Remuneration and Retirement Allowances of Directors

     Remuneration and retirement allowances of directors shall be determined by
resolution of a general meeting of shareholders.

                                   CHAPTER V
                            STATUTORY AUDITORS AND
                        THE BOARD OF STATUTORY AUDITORS

ARTICLE 27. Number of Statutory Auditors

     The Company shall have not more than four (4) statutory auditors.

ARTICLE 28. Election of Statutory Auditors

     1.     Statutory auditors of the Company shall be elected at a general
meeting of shareholders.

     2.     Resolution for election of statutory auditors shall be adopted by a
majority vote at a general meeting of shareholders at which shareholders who
hold shares representing one-third (1/3) or more of the total number of issued
shares with voting rights are present.
<PAGE>

ARTICLE 29. Term of Office of Statutory Auditors

     1.     The term of office of statutory auditors shall expire at the
conclusion of the ordinary general meeting of shareholders with respect to the
last closing of accounts within three (3) years after their assumption of
office.

     2.     The term of office of any statutory auditor elected to fill a
vacancy due to early retirement shall be the same as the remainder of the term
of office of the retired statutory auditor.

ARTICLE 30. Standing Statutory Auditor

     Standing statutory auditor shall be appointed from among the statutory
auditors.

ARTICLE 31. Notice of Convocation of Meetings of the Board of Statutory Auditors

     Notice of convocation of a meeting of the Board of Statutory Auditors shall
be sent to each statutory auditor at least three (3) days prior to the date set
for such meeting; provided, however, that in case of urgency such period may be
shortened.

ARTICLE 32. Method of Resolution of the Board of Statutory Auditors

     Unless otherwise provided by laws and ordinances, resolutions of the Board
of Statutory Auditors shall be adopted by a majority of the statutory auditors.

ARTICLE 33. Minutes of the Board of Statutory Auditors

     The substance of proceedings at a meeting of the Board of Statutory
Auditors and the results thereof shall be recorded in the minutes of the meeting
which shall bear the names and seals of the statutory auditors present thereat.

ARTICLE 34. Regulations of the Board of Statutory Auditors

     Matters concerning the Board of Statutory Auditors shall be governed by the
Regulations of the Board of Statutory Auditors established by resolution of the
Board of Statutory Auditors in addition to laws and ordinances and these
Articles of Incorporation.

ARTICLE 35. Remuneration and Retirement Allowances of Statutory Auditors

     The remuneration and retirement allowances of statutory auditors shall be
determined by resolution of a general meeting of shareholders.

                                  CHAPTER VI
                                   ACCOUNTS

ARTICLE 36. Fiscal Year

     The fiscal year of the Company shall be from January 1 through December 31
of each year and the account shall be settled on the last day of the fiscal
year.
<PAGE>

ARTICLE 37. Dividends

     Dividends of the Company shall be paid to shareholders or registered
pledgees appearing in the final register of shareholders of the Company as of
December 31 of each year.

ARTICLE 38. Interim Dividends

     The Company may, upon resolution of the Board of Directors, make pecuniary
distribution provided for in Article 293-5 of the Commercial Code (hereinafter
referred to as the "interim dividends") to shareholders or registered pledgees
appearing in the final register of shareholders of the Company as of June 30 of
each year.

ARTICLE 39. Conversion of Convertible Bonds and Dividends or Interim Dividends
            Thereon

     The first dividends or interim dividends on shares issued upon conversion
of convertible bonds shall be paid on an assumption that the conversion has
taken place on January 1 for claims made during a period from January 1 through
June 30 and on July 1 for claims made during a period from July 1 through
December 31.

ARTICLE 40. Prescription Period of Dividends

     1.     In case dividends or interim dividends remain unclaimed for three
(3) years after the date of commencement of payment, the Company shall be
relieved from the obligation of payment thereof.

     2.     Unclaimed dividends or interim dividends shall not bear any
interest.
<PAGE>

     We hereby certify that the above is the Articles of Incorporation of the
Company currently in effect.

                                                 Date:


                                                 Chang Ming Jang

                                                 President and Representative
                                                 Director
                                                 Trend Micro Incorporated

<PAGE>

                                                                    EXHIBIT 10.9

                                                          Agreement No._________
                                                          ----------------------
- ---------------
 Revenue Stamp

 (Yen)4000
- ---------------


     Note:  Portions of this Exhibit have been omitted pursuant to a request for
confidential treatment filed with the SEC under Rule 406. The omitted
confidential material has been confidentially submitted separately with the SEC.

            Basic Agreement on Continual Sale and Purchase of Goods

                                 (Translation)



     October 1, 1999



                                                  Seller:

                                                  Trend Micro Incorporated

                                                  Odakyu Southern Tower 10F
                                                  2-2-1 Yoyogi
                                                  Shibuya-ku, Tokyo

                                                  Representative Director

                                                  Chang Ming Jang


                                                  Buyer:

                                                  SOFTBANK COMMERCE CORP.

                                                  24-1 Nihonbashi-Hakozaki-cho
                                                  Chuo-ku, Tokyo

                                                  Representative Director

                                                  Ken Miyauchi
<PAGE>

     This Agreement is entered by and between Trend Micro Incorporated (the
"Seller") and SOFTBANK COMMERCE CORP. (the "Buyer" or, collectively with the
Seller, the "Parties"), concerning continual sale and purchase of goods between
the Parties.

1.   Scope of the Agreement

     1.1  Any matter provided herein shall be equally applicable to any and all
          Sale and Purchase Agreements to be executed between the Parties during
          the term of this Agreement pursuant to Article 5 hereof ("Individual
          Agreement").

     1.2  Upon execution of the Agreement, any previous agreements entered
          between the Parties concerning the Buyer's placement of orders for
          goods with the Seller ("Old Agreements"), such as "Basic Agreement on
          Continual Purchase and Sale of Goods", shall lose effect in their
          entirety.

     1.3  This Agreement shall apply to the rights and obligations relating to
          the Individual Agreement that have arisen between the Parties under
          the Old Agreement.

     1.4  Any reference made to the Old Agreement in any memorandum executed
          between the Parties pursuant to the Old Agreement shall mean reference
          to this Agreement.

2.   Definitions

     As used in this Agreement, unless otherwise provided, the following terms
shall have the following meanings:

     (1)  "Goods" means any software for personal computers ("PCs"), PCs,
          peripheral equipment for PCs or similar Goods, and supplies relating
          thereto, that are or will be manufactured or sold within the Territory
          by the Seller. Provided, however, that Goods shall include items,
          other than those mentioned above, as may be determined by the Parties
          in writing.

     (2)  "Territory" means Japan and other areas as may be determined by the
          Parties in writing.

3.   Purpose

     The Seller shall continually sell Goods to the Buyer under the terms and
conditions set forth herein, and the Buyer shall purchase and sell such Goods
within the Territory.
<PAGE>

4.   Sale Price

     4.1  The Seller shall sell Goods to the Buyer at the price set forth in a
          separate Memorandum to be entered into between the Parties.

     4.2  The Buyer shall determine the Good's selling prices to its customers.
          (including, but not limited to, Buyer's affiliated companies, and the
          resellers or end users the Buyer conducts business with.)

5.   Individual Contracts

     5.1  The name, quantity, place and date of delivery of Goods, and other
          terms necessary to effect the sale and purchase between the Parties,
          except those provided herein, shall be set forth in the Individual
          Agreement to be executed between the Parties.

     5.2  The Individual Agreement mentioned in the preceding paragraph shall
          take effect when the Seller expresses to the Buyer of its acceptance
          of the order upon Seller's receipt of the Buyer's order form
          (including orders by fax), or when the Seller fails to express its
          intention either within the same day of its receipt of Buyer's order,
          or by 10:00 a.m. the following day. In either case, the Seller shall
          notify the Buyer of the date of delivery of the Goods specified in the
          Individual Agreement simultaneously with the notification to accept
          the order. Provided, however, to the extent that the Seller has
          already stopped manufacturing the Goods as of the Seller's receipt of
          Buyer's order form, or that any one of the events set forth in Article
          22 herein has occurred to the Seller, the Seller may refuse to execute
          the Individual Agreement. In cases where the Seller deems it difficult
          to accept the order for other reasons, the Seller shall immediately so
          notify the Buyer in writing, and the Parties shall consult with each
          other in good faith to discuss the possibility of changing relevant
          terms of agreement.

6.   Inspection of Delivery

     6.1  The Seller shall deliver the Goods and the statement of delivery,
          prepared in a form specified by the Buyer, to the Buyer by bringing or
          sending the foregoing to the warehouse or other place as specified by
          the Buyer. The Buyer shall promptly inspect the Goods after receiving
          the delivery thereof. Goods are deemed to have been received upon
          passing such inspection. The Seller shall, at its own expense and on
          its own responsibility and within the time period specified by the
          Buyer, take back the Goods which have failed to pass the above
          inspection and the quantity which has exceeded the amount stipulated
          in the Individual Agreement, and if necessary, replace rejected Goods.

     6.2  When the Seller fails to take back the rejected Goods or the quantity
          which has exceeded the amount specified in the Individual Agreement
<PAGE>

          ("Excess Delivery") within the time period set forth in the preceding
          paragraph, the Buyer may send back the foregoing to the Seller at the
          Seller's expense.

     6.3  The Buyer shall keep the rejected Goods or Excess Delivery in its
          custody with the same care as it uses to its own property, and in
          cases where the rejected Goods or Excess Delivery was damaged due to
          causes not attributable to the Buyer, the Seller shall bear such
          damage.

7.   Delayed Delivery

     7.1  When it is deemed impossible to deliver the Goods by the delivery date
          specified in the Individual Agreement due to causes attributable to
          the Seller, the Seller shall promptly inform the Buyer of, including
          causes thereof, in writing and seek instructions from the Buyer.

     7.2  Where it is impossible to deliver the Goods by the date specified in
          the Individual Agreement due to causes attributable to the Seller, the
          Buyer shall have the right to claim damages for delayed delivery at
          the rate of [*]. Notwithstanding the payment of the foregoing damages,
          the Seller shall not be released from the liability set forth in
          Article 23 herein.

     7.3  Where the delivery is delayed for causes not attributable to the
          Buyer, the Buyer may terminate the Individual Agreement with respect
          to such Goods.

8.   Transfer of Title

     8.1  The title of Goods shall be transferred upon completion of the
          inspection set forth in Article 6 herein.

     8.2  Where the Goods are software products, the title to the media of the
          software alone shall transfer as set forth in the preceding paragraph,
          and the right to use the software and other rights shall be directly
          licensed to end users by the licensor ("Original Licensor") pursuant
          to the license or other agreement entered into between the Buyer or
          the Original Licensor.

9.   Risk of Loss

     The Seller shall be liable for any loss, impairment or other damage which
occurred in the Goods prior to completion of inspection, except where causes of
such loss, impairment or other damage are attributable to the Buyer. The Buyer
shall be liable for any loss, impairment or other damage which occurred in the
Goods after completion of inspection, except where causes of such loss,
impairment or other damage are attributable to the Seller.

* Confidential Treatment Requested

<PAGE>

10.  Payment Terms

     10.1  The Buyer shall pay to the Seller the price for the Goods passing the
           inspection, which have been received by the fifteenth day of each
           month (hereinafter the "Amount Due"), by remitting the said amount to
           a bank account designated by the Seller no later than the end of the
           second month following each Closing Date. The remittance fee shall be
           borne by the Seller. Provided, however, the Buyer can setoff the
           payment of the Amount Due against the amount received by the Seller
           for the Goods returned to the Seller by the Buyer ("Amount to be
           Returned"), if there is such Amount to be Returned as of the
           fifteenth day of the said month. In cases where the Amount to be
           returned exceeds the Amount Due, the Seller shall pay the difference
           into the bank account designated by the Buyer no later than the end
           of the second month from thereof.

     10.2  In cases where the fractions of one yen arise in relation to the
           computation of the consumption tax, the said fractions shall be
           discarded.

     10.3  The Seller shall promptly confirm the sum of the Amount paid, and if
           any discrepancies in the sum are found (if there has been a
           miscalculation), the Seller shall promptly contact the Buyer, and the
           Parties shall quickly resolve the matter through discussion. Where no
           protest has been lodged within 6 months of the Seller's receipt of
           the Amount, the Seller shall no longer be able to claim a
           miscalculation.

11.  Promise of Setoff

     If the Seller is under any monetary obligations to the Buyer, the Buyer can
at any time offset such obligations against the Buyer's monetary obligations to
the Seller under this Agreement to the extent of the corresponding amount to his
obligations.

12.  Return of Goods

     Matters relating to return of Goods shall be set forth in the Memorandum to
be executed between the Parties.

13.  Rebates

     Matters relating to rebates on Goods shall be set forth in the Memorandum
to be executed between the Parties.

14.  Warranty of Quality and Function

     14.1  The Seller warrants that the Goods have no defects in their quality
           and function.

     14.2  In cases where the Buyer, its customer, or other third party has
           suffered damage due to defective Goods or where the Buyer has
           received claims or
<PAGE>

           complaints relating to the Goods from its customers, the Seller
           shall, at its own expense and responsibility, resolve the issue by
           replacing such defective Goods, payment of damages or other
           appropriate measures within one year from the receipt of the Goods,
           and hold the Buy harmless, provided, however, that the Seller shall
           keep the Buyer advised of the status of resolution and act under
           instructions, if any, from the Buyer.

     14.3  In the event the Buyer or its customer is forced to pay damages to
           any third party based on the claims or complaints mentioned in 14.2
           above, the Seller shall indemnify such Buyer or its customer, as
           applicable, against any and all damages and costs arising out of or
           incurred in contesting to any claim relating to such disputes.
           (including litigation costs, attorney's fees and other professional
           fees)

     14.4  The Seller shall bear all expenses for shipment, processing of
           returns and such other costs as the Buyer incurs in connection with
           the Buyer's recall or replacement of Goods attributable to a fault in
           the Goods.

     14.5  Even after the lapse of one year from the receipt of Goods, upon
           detection of latent defects arising from the willfulness or gross
           negligence of the Seller, the Seller shall be liable for the
           obligations set forth in 14.2, 14.3 and 14.3 hereof.

15.  Product Liability

     15.1  The Seller warrants that the Goods contain no defects under Article 2
           paragraph 2 of the Product Liability Law. ("Defects")

     15.2  The Buyer shall notify the Seller of any dispute resulting from
           Defects arising between the Buyer or its customer and other third
           party, and the Seller shall, at its own expense, provide cooperation
           and support as necessary for the Buyer or its customer to resolve
           thereof.

     15.3  In the event the Buyer or its customer has been forced to indemnify
           any third party for damages arising out of the Defects of Goods as
           set forth in the preceding paragraph, the Seller shall indemnify such
           Buyer or its customer, as applicable, against any and all damages and
           costs arising out of or incurred in contesting to any claim relating
           to such disputes. (including litigation costs, attorney's fees and
           other professional fees)

     15.4  The Seller shall bear all expenses for shipment, processing of
           returns and such other costs as the Buyer incurs in connection with
           the Buyer's recall or replacement of Goods attributable to a defect
           in the Goods.

16.  Warranty of Copyrights, etc.

     16.1  The Seller warrants that the Goods do not infringe upon industrial
           property rights, (including the rights based on the publication of
<PAGE>

           unexamined applications), copyright, circuit layout right, and other
           intellectual property right of a third party (collectively, the
           "Intellectual Property Rights") in Japan or any other country.

     16.2  In the event any infringement claims of an Intellectual Property
           Right has occurred or is threatened to occur relating to the Goods of
           the Seller, the Seller shall promptly inform the Buyer thereof.

     16.3  In the event any infringement claims of an Intellectual Property
           Right has occurred or is threatened to occur to the Buyer or its
           customer relating to the Goods of the Seller, the Seller shall, at
           its own cost and responsibility, resolve such issues. Furthermore, in
           the event the Buyer or its customer has been forced to indemnify the
           third party for damages arising out of the Defects of Goods, the
           Seller shall indemnify such Buyer or its customer, as applicable,
           against any and all damages and costs arising out of or incurred in
           contesting to any claim relating to such disputes. (including
           litigation costs, attorney's fees and other professional fees).

     16.4  The Seller shall bear all expenses for shipment, processing of
           returns and such other costs as the Buyer incurs in connection with
           the Buyer's recall or replacement of Goods resulting from the fact
           that the Seller's Goods infringed Intellectual Property Right of a
           third party.

17.  Sales Support

     17.1  The Seller shall, at its own expense, prepare and provide products
           for the Buyer for demonstration merchandise, product manuals, and
           catalogues and such other items as necessary for marketing activities
           relating to the Goods.

     17.2  Upon the Buyer's request, the Seller shall, at its own expense,
           provide technical support services necessary for the Buyer's timely
           distribution of the Goods to the Buyer or such other third party as
           may be designated by the Buyer.

     17.3  The Seller shall permit the Buyer and its customers to use the
           trademarks of the Buyer and the Goods only in promotional materials
           such as advertisements, materials, and catalogs prepared by the Buyer
           and its customers relating to sales activities for the Goods.
           Provided, however, upon the Seller's request, the Buyer shall affix
           an appropriate proprietary notice indicating the Seller's rightful
           ownership over such trademarks.

18.  New Products and Upgrades

     18.1  When the Seller plans to sell a new product or an upgrade to the
           Goods sold, the Seller shall promptly notify the Buyer thereof or
           introduce such products to the Buyer in advance.
<PAGE>

     18.2  In the case of the preceding paragraph, unless otherwise agreed upon
           between the Parties, the Buyer may return at any time the entire
           inventory of old Goods held by the Buyer and its customers. The
           expenses incurred by the Buyer in connection with the return of Goods
           including transportation expenses shall be borne by the Seller.

19.  Observance of Statutes, Standards, etc.

     19.1  The Seller's performance of the Agreement and Individual Agreements
           shall be in compliance with applicable laws, rules and standards of
           Japan and other countries. The Seller shall also abide by the Foreign
           Exchange and Foreign Trade Control Law, Export Trade Control Order,
           and order and ministerial ordinances concerning foreign exchange
           control (collectively, the "Foreign Exchange Control Laws"), and
           export trade control laws and regulations of the United States and
           other countries. (collectively, the "U.S. Export Trade Control Law")

     19.2  In cases where the Buyer requests the Seller to submit a report or
           materials in relation to the preceding paragraph, the Seller shall
           promptly comply with this request.

     19.3  The Seller shall have following obligations relating to the U.S.
           Export Trade Control Law:

     (1)   In cases where relevant regulations or conditions exist in the U.S.
           Export Trade Control Law in regard to the Goods for which a quotation
           has been requested by the Seller or on which an Individual Agreement
           is to be executed by the Parties, the Seller shall so indicate in the
           quotation or the written acknowledgement of order, as applicable;

     (2)   When the Buyer specifies the destination country of export (re-
           export) pursuant to (1) above and there is an agreement between the
           Parties that such destination country of export (re-export) is
           included in the Territory pursuant to Article 2(2) herein, the Seller
           shall confirm whether such destination country of export (re-export)
           is a destination of export (re-export) approved under the U.S. Export
           Trade Control Law, and promptly report thereof to the Buyer. If such
           destination country of export (re-export) is not an approved
           destination country and the Buyer requests the Seller to obtain the
           approval of the government organizations of the countries concerned,
           the Seller shall accept such request and promptly obtain such
           approval; and

     (3)   Notwithstanding the above, in the event that it is found after the
           Individual Agreement is executed by the Parties that applicable
           regulations or conditions exist, or that such destination country is
           not an approved destination country of export (re-export), the Seller
           shall promptly notify the Buyer in writing thereof.
<PAGE>

20.  Confidentiality

     20.1 Neither Party shall, without a prior written consent of the other
          party, disclose or leak to a third party any part of this Agreement
          (including Memorandum or Appendixes) or information disclosed by the
          other party in connection with this Agreement. Furthermore, neither
          party shall use such information unless it is necessary in order to
          perform its obligations hereunder or to exercise its rights hereunder.
          Regardless of the foregoing, either Parties may disclose such
          information for justifiable reasons including in compliance with an
          order issued by governmental authorities, provided that the disclosing
          party shall promptly notify the other party thereof prior to such
          disclosure.

     20.2 The provisions set forth in 20.1 above shall not apply to any
          information:

     (1)  that was already in the public domain at the time of disclosure;

     (2)  that becomes publicly known after it is disclosed through no fault of
          the receiving party;

     (3)  that has been rightfully in the possession of the receiving party
          prior to the disclosure;

     (4)  that was legally disclosed by a third party to the receiving party
          free of duty of confidentiality; or

     (5)  that was independently developed by the receiving party without using
          or making reference to the confidential information of the disclosing
          party.

     (6)  that was indicated not to be confidential by the disclosing party.

21.  Term of Agreement

     21.1 This Agreement shall become effective as of the date of execution and,
          unless cancelled or terminated in accordance with the provisions
          herein, remain in force until March 31, 2000.  The term of this
          Agreement shall automatically renew for one year term unless one party
          delivers written notice to the other party no later than one month
          prior to the end of the current term of its intent not to renew this
          Agreement, and the same shall apply thereafter.

     21.2 Without regard to the provisions set forth in the preceding paragraph,
          the Agreement shall become null and void upon its date of expiration
          if no dealings are made between the Parties pursuant to the Agreement
          during the term stipulated in the preceding paragraph.
<PAGE>

22.  Termination Without Cause

     If any of the following events occurs to the Seller, the Buyer may
immediately terminate this Agreement in whole or in part, without issuing a
warning or tender of performance of its obligation. Furthermore, the Buyer may
claim damages against the Seller upon such termination:

     (1)  breach by the Seller of any of the terms set forth herein;

     (2)  suspension of payment of debts or filing of petition for bankruptcy,
          commencement of composition of creditors, corporate reorganization
          proceedings, company arrangement or special liquidation of the Seller;

     (3)  an action by the Clearing House for suspension of the Seller's
          business transactions with financial institutions;

     (4)  issuance of an order or notice of attachment, temporary attachment,
          disposition, public auction of the Sellers property, or sanction
          against the Seller for tax arrearage or other act of public power;

     (5)  a resolution of the Seller for the reduction of capital,
          discontinuance of business, dissolution or change of organization;

     (6)  the Seller's failure to perform any of its obligations to the Buyer;

     (7)  the Seller's material breach of trust; or

     (8)  the Seller's financial condition has become deteriorated or is
          reasonably believed to deteriorate.

23.  Damages

     23.1 Either party shall be liable for any damage suffered by the other
          party due to causes attributable to itself, regardless of whether such
          damages could occur under ordinary circumstances or special
          circumstances, to the extent that such damage was foreseen or
          foreseeable at the time of performance of its obligations hereunder.

     23.2 The damages set forth 23.1 above shall include all expenses incurred
          in seeking the other party's performance of its obligations hereunder,
          as well as reasonable attorney's fees relating to court proceedings
          including litigation.

24.  Effect of Termination

     24.1 Upon termination of this Agreement by cancellation or expiration of
          the term or for any other cause, any of the Individual Agreements
          which are
<PAGE>

          current as of the time of such termination shall also terminate unless
          otherwise agreed between the Parties.

     24.2 Termination of this Agreement, whether by cancellation or expiration
          of the term or for any other cause, shall not accelerate the
          performance of the Buyer's obligation to the Seller.

     24.3 In the event this Agreement is terminated, the Buyer may, at its own
          discretion, dispose such Goods of the Seller as may be held in custody
          of the Buyer pursuant to Article 6 herein and apportion the proceeds
          therefrom less the disposal expenses to the satisfaction of the
          Seller's obligations, if any.

     24.4 In the event that this Agreement is terminated, the Buyer shall be
          entitled to return all the Goods in its inventory to the Seller. The
          same shall apply to the Goods returned to the Buyer by its customers
          within one year from the date of termination or expiration of this
          Agreement.

     24.5 In the event of return of the Goods pursuant to 24.4 above, the Seller
          shall return the price of the Goods already paid by the Buyer, by
          remitting to a bank account specified by the Buyer no later than the
          fifth day of the following month the amount for the Goods returned by
          the end of the month.

     24.6 Notwithstanding the termination of this Agreement by cancellation or
          expiration of the term or for any other cause, the provisions of
          Article 11 (Promise of Setoff), Article 14 (Warranty of Quality and
          Function), Article 15 (Product Liability), Article 16 (Warranty of
          Copyrights, etc.), Article 19 (Observance of Statutes, Standards,
          etc.), Article 20 (Confidentiality), Article 24 (Effect of
          Termination), and Article 27 (Jurisdiction) shall remain in full force
          and effect.

25.  No Assignment

     The Seller shall not assign, or pledge as collateral, any of the rights or
obligations hereunder to any third party without the written consent of the
Buyer.

26.  Notification

     The Seller shall notify the Buyer in writing of any of the following:

     (1)  any change of its bank account for remittance and the name of the
          holder thereof;

     (2)  establishment, relocation or closure of its head office or branch
          office;

     (3)  change of its representative directors; or
<PAGE>

     (4)  material change in its business or likeliness of such material change.

27.  Jurisdiction

     In the event any dispute arises between the Parties relating to the
Agreement or Individual Agreement, the District Court or the Summary Court
having jurisdiction over the area in which the head office of the Buyer is
located shall have exclusive jurisdiction as the court of first instance.

28.  Amendment

     This Agreement may be amended only by a written agreement signed and sealed
by the representative officer of the Parties. If there is any discrepancy
between the provisions of the Agreement and the Individual Agreement, such
provision shall be null and void.

29.  Mutual Consultation

     If any doubts arise in connection with this Agreement, the Parties shall
consult with each other in good faith to resolve such issue.



     IN WITNESS WHEREOF, the parties hereto have caused this instrument to be
executed in duplicate, affixing their names and seals thereto and each party
retaining one copy.
<PAGE>

                                 Confirmation


Trend Micro Incorporated ('Seller') and SOFTBANK COMMERCE CORP. ('Buyer') enter
into this written Confirmation (hereinafter, the 'Confirmation'), pursuant to
the Basic Agreement on Continual Sale and Purchase of Goods (hereinafter, the
'Original Agreement') entered into as of October 1, 1999 between Seller and
Purchaser.

     Article 1.  (Ratio of Retail Price to Purchase Price)

     Unless otherwise agreed in writing by the Parties, the ratio of the Retail
Price to the Purchase Price provided in Article 4.1 of the Basic Agreement shall
be as set forth below.

     The ratio of the Retail Price to the Purchase Price of the Goods of the
Seller shall be determined with respect to each item of the Goods upon mutual
consultation between the Parties.

     Article 2.  Return of the Goods

     Unless otherwise agreed in writing by the Parties, Return of the Goods
provided in Article 12 of the Basic Agreement shall be as set forth below.

     Each party shall, when necessary, consult with each other to agree on
return of the Goods purchased by the Buyer from the Seller. The Buyer may, in
accordance with such agreement, return such Goods as it purchased from the
Seller. No later than the end of the [*] after the month in which such return of
Goods occurred, the Seller shall make a cash payment into the bank account
designated by the Buyer in the amount the Seller has received from the Buyer in
connection the Goods subsequently returned by the Buyer to the Seller by the
fifteenth day of the month thereof. This section does not apply to certain Goods
concerning which return the Basic Agreement states otherwise.

     Article 3.  Rebates

     Unless otherwise agreed in writing by the Parties, rebates on the Goods as
provided in Article 13 of the Basic Agreement shall be as set forth below.

          (1) The Seller shall pay rebates in accordance with the terms provided
in this Article 3 (1) herein.  Rebates shall be [*], less returns. ("Net
Purchase Price")

          (2) The Seller shall pay to the Buyer the rebate calculated in
accordance with Article 3(1) above.  Rebate payments shall be effected, and
shall be deducted from the Buyer's payments to the Seller due in the following
month such rebate is calculated.  Where the amount of rebates exceed the Buyer's
payments to the Seller, the Seller shall pay the difference into the bank
account designated by the Buyer no later than the date specified by the Buyer.

*Confidential Treatment Requested
<PAGE>

     Article 4.  Term

          The Memorandum shall become effective on the date as written below and
remain effective until the termination of the Basic Agreement.

Dated: October 1, 1999

Seller:
Trend Micro Incorporated

10th Floor Odakyu Southern Tower 2 - 2 - 1 Yoyogi, Shibuya-ku, Tokyo

Chang Ming Jang
Representative Director


Buyer
SOFTBANK COMMERCE CORP.

24-1 Nihonbashi-Hakozaki-cho
Chuo-ku, Tokyo

Ken Miyauchi
Representative Director
<PAGE>

                         MEMORANDUM CONCERNING SALES
                                PROMOTIONS FEES

SOFTBANK COMMERCE CORP. ("Softbank") and Trend Micro Kabushiki Kaisha ("Trend
Micro") shall manage Sales Promotion Fees for the year 2000 as follows.

Article 1.  Purpose of Memorandum

     Trend Micro shall pay Softbank the Sales Promotion Fees defined in Article
3 as compensation for business support activities.

Article 2.  Term

     This memorandum shall be valid for 1 year from January 2000.

Article 3.  Stock Target

     The value of the yearly Stock Purchase Target for Trend Micro's products
shall be [*] yen.

     1    The [*] breakdown of the yearly Stock Purchase Target shall be as per
          below:

[*]

     2    Products

     The Products included shall be licenses and packages for InterScan
VirusWall, InterScan eManager, InterScan for MS-Exchange, InterScan for
LotusNotes, Trend VCS, ServerProtect and VirusBuster Corporate Edition.

Article 4.  Method for calculating Sales Promotion Fees.

     Upon attainment of the Stock Purchase Targets defined in Section 3 - 1 [*],
the Sales Promotion Fees shall be calculated per below. However, in the event
the [*] Stock Purchase Target has not been attained, the Stock Purchase Target
shall be reviewed on a [*] basis, and upon attainment of the [*] Stock Purchase
Target, the corresponding Sales Promotion Fees shall be paid.

            1  [*]% attainment: Sales Promotion Fees shall be [*]% of the total
       value of purchase.

            2  [*]% attainment: Sales Promotion Fees shall be [*]% of the total
       value of purchase.


* Confidential Treatment Requested
<PAGE>

Article 5.  Payment

            3  Payment shall be made from the Sales Promotion Fees calculated in
       Article 4 for business support activities described in the attachment to
       be determined by mutual consultation between both parties.

            4  Payment shall be made upon Trend Micro receiving an invoice from
       Softbank.  The payment terms of Trend Micro shall as a rule be by the
       20/th/ day of the [*] after receipt of the invoice.

            5  Payment by Trend Micro shall be made to the payment account
       specified in the Softbank invoice.

Article 6.  Penalties

     In the event that any of the Products included in the calculations made for
the Sales Promotions Fees are returned within a year of sale, Trend Micro shall
deduct the value of the returned Product from the vale of total value of
purchase, and the Sales Promotion Fees shall be recalculated. In the event a
discrepancy arises in the amount payable to Trend Micro, Softbank shall be
requested to repay the difference or change the amount of payment. However,
replacements shall not be considered returned Product for the purposes of this
Memorandum.

Article 7.  Obligations of Softbank

     To facilitate the calculation of costs incurred, Softbank shall be obliged
to submit monthly Product inventories and sales reports, in response to a
monthly request from Trend Micro.

Article 8.  Cancellation and Termination

     1    In the event that any of the following occurs on the part of either
party, the other party may immediately terminate this Memorandum without notice.

i)   When payments have been halted, or when petitioning for bankruptcy, or
     commencement of composition of creditors or procedures for corporate
     rearrangement, corporate reorganization, or special liquidation.

ii)  When a suspension has been effected by a clearing house.

iii) In the event of some other material breach of faith which will preclude the
     Memorandum being continued.

     2    Softbank or Trend Micro may terminate this Memorandum, when the other
party fails to fulfill any of its obligations under this Memorandum, and further
fails to correct the same within a reasonable period after preemptory notice
from the other party

* Confidential Treatment Requested
<PAGE>

Article 9.  Consultation

     In the event there is doubt concerning the interpretation of this
Memorandum, Softbank and Trend Micro shall resolve the same by good-faith mutual
consultation.




IN WITNESS WHEREOF, two originals hereof are created, and upon the names and
seals of each of Softbank and Trend Micro, each shall retain one original
hereof.

Date:

Softbank    Representative:
            Corporate name:
            Address:

Trend Micro Officer in charge:    Shingo Koya, General Manager
                                  Business Partners Department
                                  Sales and Marketing Headquarters
            Corporate name:       Trend Micro Kabushiki Kaisha
            Address:              Odakyu Southern Tower, 10F
                                  2-2-1 Yoyogi, Shibuya-ku, Tokyo-to.
<PAGE>

(Attachment)

Description of Business Support

                                                               February 22, 2000

<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------------------
Preparation of Sales Promotion product       Materials such as catalogues etc. (with joint logo)
- --------------------------------------------------------------------------------------------------
<S>                                          <C>
   Acquisition of Certification                                       TCAE/TCSE
- --------------------------------------------------------------------------------------------------
           Campaign                                    Directed at Softbank employees and sales
                                                      agents with the purpose of sales promotion
- --------------------------------------------------------------------------------------------------
           Seminar                                       Includes introduction to Trend Micro
                                                         products; Purpose - to expand sales
- --------------------------------------------------------------------------------------------------
                                       Matters to note

Business support activities other to those described above shall be determined through mutual
                               consultation by both parties
- --------------------------------------------------------------------------------------------------
     (attached materials)                                                none
- --------------------------------------------------------------------------------------------------
</TABLE>

Trend Micro Kabushiki Kaisha.
<PAGE>

                   MEMORANDUM CONCERNING AGREEMENT TRANSFER

          Trend Micro Incorporated ("Trend Micro") and SOFTBANK E-COMMERCE Corp.
(formerly Softbank Commerce; hereinafter "SOFTBANK E-COMMERCE") hereby agree to
the following concerning the transfer of the agreement to be conducted pursuant
to the transfer of business of Softbank eCommerce scheduled to take place on
April 1, 2000.

Article 1.  Transfer of Agreement

1.   Softbank eCommerce shall, by a resolution of an Extraordinary General
     Meeting of Shareholders convened on December 24, 1999 ("Extraordinary
     General Meeting"), transfer the Soft Network businesses to the Transferee
     designated in the same resolution, SOFTBANK COMMERCE Corp. (to be
     established in March 2000; hereinafter "the Transferee"), and shall
     transfer to the Transferee the status of the parties to, and the rights and
     obligations under any transaction agreements entered into between the two
     parties which have been executed by and are still valid on the Effective
     Date stipulated in Article 3 ("the Agreements").

2.   Trend Micro shall consent to the agreement transfer ("Agreement Transfer")
     described in the preceding paragraph.

Article 2.  Agreement by the Transferee

          Immediately after the Transferee has been duly incorporated, SOFTBANK
E-COMMERCE shall cause the Transferee to furnish Trend Micro and SOFTBANK
E-COMMERCE with documentation stating its consent to, in accordance with the
contents of this Memorandum, accept the Agreements and all rights and
obligations thereunder, and accord SOFTBANK E-COMMERCE with the rights to
receive as settlement agent in accordance with Article 5.

Article 3.  Effective Date

          The Agreement Transfer shall become effective upon the following two
provisions being satisfied (scheduled to be April 1, 2000; hereinafter "the
Effective Date").

1.   The submission of written consent as described in the preceding article
     from the Transferee.

2.   The transfer of the business operations by SOFTBANK E-COMMERCE to the
     Transferee following the necessary license and permission being obtained
     from the relevant authorities pursuant to a resolution of the Extraordinary
     General Meeting.

Article 4.  Effect of Transfer

     The status of the parties to the Agreements, all rights and duties
thereunder (including all mortgages, guarantor rights, rights to claim
compensation and the like) as

<PAGE>

well as obligations arising therefrom shall pass from SOFTBANK E-COMMERCE to the
Transferee in their entirety.

          Provided however, SOFTBANK E-COMMERCE shall remain liable to jointly
and severally perform with the Transferee any of the following obligations with
regard to Trend Micro:

1.   All obligations under Individual Agreements concluded between Trend Micro
     and SOFTBANK E-COMMERCE prior to the Agreement Transfer pursuant to Master
     Agreements included in the Agreements;

2.   Obligations where either of the following had been determined prior to the
     Agreement Transfer.

     i.   Amount of obligation;

     ii.  Type and quantity of goods;

3.   Damages arising from default on the agreements on the part of SOFTBANK
     E-COMMERCE prior to the Agreement Transfer;

4.   Obligations agreed to by both parties separately in writing other to those
     specified in the preceding paragraphs.

Article 5.  Acquisition of Rights to Receive as Settlement Agent

          SOFTBANK E-COMMERCE shall be accorded by the Transferee the rights to
act as agent with regard to receipt of settlements for all claims transferred to
the Transferee from SOFTBANK E-COMMERCE pursuant this Memorandum, and therefore,
after the Effective Date Trend Micro may make settlements with either SOFTBANK
E-COMMERCE or the Transferee.

Article 6.  Mutual Consultation

          If any doubts arise in connection with matters not defined in this
Memorandum, the parties shall resolve such by good faith mutual consultation.
<PAGE>

IN WITNESS WHEREOF, the parties hereto have caused this instrument to be
executed in duplicate, and each party shall retain one copy hereof.


March 31, 2000


                         Trend Micro Incorporated
- ------------------
 Revenue stamp           Representative Director
 (Yen)200                Chang Ming Jang
- ------------------

                         Odakyu Southern Tower 10F
                         2-2-1 Yoyogi
                         Shibuya-ku, Tokyo 151-8583 [seal]



                         SOFTBANK E-COMMERCE CORP.
                         Representative Director
                         Ken Miyauchi

                         24-1 Nihonbashi-Hakozaki-cho
                         Chuo-ku, Tokyo [seal]


<PAGE>

                                                                   EXHIBIT 10.10


                       STOCK PURCHASE AND SALE AGREEMENT


TREND MICRO INCORPORATED (hereinafter, "Trend Micro"), TOMOO YAMADA
(hereinafter, "Yamada"), and NIHON UNISOFT CORPORATION (hereinafter, "Nihon
Unisoft") hereby execute this agreement as follows (hereinafter, this
"Agreement") concerning the purchase and sale and like matters of Nihon Unisoft
shares held by Yamada to Trend Micro.

Article 1      Purchase and Sale of Shares

1.   Yamada, in accordance with the terms and conditions contained in this
     Agreement, shall sell to Trend Micro the shares of Nihon Unisoft in the
     manner noted hereunder, and Trend Micro shall purchase the same from Yamada
     (hereinafter, the shares set forth below as subject to the purchase and
     sale shall be referred to as the "Shares"). Within 6 business days after
     the date of execution of this Agreement, Yamada shall deliver to Trend
     Micro share certificates which represent the Shares.


               Par-value common stock    266 shares
                                         ---

               Par-value per share       50,000 yen
                                         ------

               Purchase price amount per share  1,000,000 yen
                                                ---------


2.   Trend Micro shall divide the total purchase price of the Shares of
     266,000,000 yen into two installments, and shall make payment thereof by
     -----------
     remitting to a bank account prescribed by Yamada: 1) 75% of the total price
     within 6 business days after receiving the share certificates representing
     the Shares from Yamada, and 2) 25% of the total price within 6 months after
     receiving the share certificate(s) representing the Shares from Yamada.
     Interest at the rate of 5% per annum shall accrue on the purchase price of
     the Shares.


3.   Upon acquisition of the Shares, Trend Micro, as a shareholder of Nihon
     Unisoft, shall demand that Nihon Unisoft pay each of its employees an
     amount equal to one month of their respective pay as a special bonus.


Article 2  Representations and Warranties


1.   Yamada and Nihon Unisoft hereby make the following representations and
     warranties.

     1)   Nihon Unisoft is a legally established and legally operated kabushiki
          gaisha stock company.
<PAGE>

     2)   At the time of the execution of this Agreement, Yamada validly holds
          title and ownership with regard to all the certificates representing
          the Shares, and no lien or security rights shall be established upon
          said certificates as of the time of delivery thereof to Trend Micro.

     3)   The approval of the Board of Directors at Nihon Unisoft and all other
          procedures required under laws, ordinances and the articles of
          incorporation have been legally completed with regard to transfer of
          the Shares pursuant to this Agreement.

     4)   At the time of the execution of this Agreement, the total number of
          common stock shares issued and outstanding of Nihon Unisoft is 2,400
          shares, there are no existing convertible bonds or bonds with new
          share acquisition rights or the like, and further, there does not
          exist any latent or potential shares pursuant to subscription rights
          to new shares or the like.

     5)   For the period following the execution of this Agreement until Trend
          Micro takes delivery of the stock certificates representing the
          Shares, Nihon Unisoft shall not issue new shares, convertible bonds,
          or bonds with new share acquisition rights without obtaining the prior
          written consent of Trend Micro.

     6)   No false entries were included in the business reports, balance
          sheets, income statements, accompanying details and specifications,
          and monthly settlement statements issued in the business years from
          1996 through 1999, as well as the most recent business plan.

     7)   As of the execution date of this Agreement, Nihon Unisoft is not a
          party to litigation, a provisional attachment, or a provisional
          disposition case.


2.   Trend Micro may immediately cancel this Agreement in the event Yamada
     violates the provisions of the preceding Article. In addition, in such
     instances, Trend Micro may seek jointly and severally from Yamada and Nihon
     Unisoft compensation of damages suffered as the result of such breach.

Article 3  Designation of Purchase Parties

Trend Micro may, at its own discretion, designated its subsidiary companies as
the parties purchasing the Shares.  In such instances, Yamada and Nihon Unisoft
shall treat the subsidiaries designated by Trend Micro as the concerned parties.

Article 4  Confidentiality

Trend Micro, Yamada and Nihon Unisoft shall exercise the same degree of care
afforded their own confidential information with regard to the existence and
content of this Agreement as well as the confidential information of the other
parties obtained with regard to this Agreement, and shall not disclose or
divulge the same to a third party without the prior written consent of all other
parties.
<PAGE>

Article 5  Cancellation of Agreement

In the event any party is in breach of this Agreement, and fails to correct said
breach within 10 days after written notice from another party requesting the
correction thereof, the other party may cancel this Agreement.  However, the
exercise of the cancellation right under this Article shall not preclude the
seeking of compensation of damages.


Article 6  Assignment

The parties to this Agreement may not transfer their rights or obligations under
this Agreement to a third party without the prior written consent of the other
parties.


Article 7  Nullification of Prior Agreement

All parties to this Agreement hereby agree that, simultaneously with execution
of this Agreement, that certain "Stock Purchase and Sale Agreement " executed by
and among Trend Micro, Yamada and Nihon Unisoft on January 25, 2000 shall be
null and void.

Article 8  Agreed Jurisdiction

Trend Micro, Yamada and Nihon Unisoft hereby agree that the Tokyo District Court
shall be the court of first instance having exclusive jurisdiction over all
disputes arising from or in relation to this Agreement.


IN WITNESS of this Agreement, three originals hereof are created, and upon the
names and seals of each of Trend Micro, Yamada and Nihon Unisoft, one original
hereof shall be retained by each.


     February 22, 2000


     Odakyu Southern Tower 10F. 2-2-1 Yoyogi, Shibuya-ku, Tokyo
     Trend Micro Incorporated
     Chang Ming Jung, Representative Director


     Yamada:


     Nihon Unisoft:
<PAGE>

                       STOCK PURCHASE AND SALE AGREEMENT


TREND MICRO INCORPORATED (hereinafter, "Trend Micro"), INFOS (hereinafter,
"InfoS"), and NIHON UNISOFT CORPORATION (hereinafter, "Nihon Unisoft") hereby
execute this agreement as follows (hereinafter, this "Agreement") concerning the
purchase and sale and like matters of Nihon Unisoft shares held by InfoS to
Trend Micro.


Article 1 Purchase and Sale of Shares


1.   InfoS, in accordance with the terms and conditions contained in this
     Agreement, shall sell to Trend Micro the shares of Nihon Unisoft in the
     manner noted hereunder, and Trend Micro shall purchase the same from InfoS
     (hereinafter, the shares set forth below as subject to the purchase and
     sale shall be referred to as the "Shares"). Within 6 business days after
     the date of execution of this Agreement, InfoS shall deliver to Trend Micro
     share certificates which represent the Shares.


               Par-value common stock    1,334 shares
                                         -----

               Par-value per share       50,000 yen
                                         ------

               Purchase price amount per share  1,000,000 yen
                                                ---------


2.   Trend Micro shall divide the total purchase price of the Shares of
     1,334,000,000 yen into two installments, and shall make payment thereof by
     -------------
     remitting to a bank account prescribed by InfoS: 1) 75% of the total price
     within 6 business days after receiving the share certificates representing
     the Shares from InfoS, and 2) 25% of the total price within 6 months after
     receiving the share certificate(s) representing the Shares from InfoS.
     Interest at the rate of 5% per annum shall accrue on the purchase price of
     the Shares.


Article 2 Representations and Warranties


1.   InfoS and Nihon Unisoft hereby make the following representations and
     warranties.

     1)   Nihon Unisoft is a legally established and legally operated kabushiki
          gaisha stock company.

     2)   At the time of the execution of this Agreement, InfoS validly holds
          title and ownership with regard to all the certificates representing
          the Shares, and no lien or security rights shall be established upon
          said certificates as of the time of delivery thereof to Trend Micro.

     3)   The approval of the Board of Directors at Nihon Unisoft and all other
          procedures required under laws, ordinances and the articles of
          incorporation have been legally completed with regard to transfer of
          the Shares pursuant to this Agreement.
<PAGE>

     4)   At the time of the execution of this Agreement, the total number of
          common stock shares issued and outstanding of Nihon Unisoft is 2,400
          shares, there are no existing convertible bonds or bonds with new
          share acquisition rights or the like, and further, there does not
          exist any latent or potential shares pursuant to subscription rights
          to new shares or the like.

     5)   For the period following the execution of this Agreement until Trend
          Micro takes delivery of the stock certificates representing the
          Shares, Nihon Unisoft shall not issue new shares, convertible bonds,
          or bonds with new share acquisition rights without obtaining the prior
          written consent of Trend Micro.

     6)   No false entries were included in the business reports, balance
          sheets, income statements, accompanying details and specifications,
          and monthly settlement statements issued in the business years from
          1996 through 1999, as well as the most recent business plan.

     7)   As of the execution date of this Agreement, Nihon Unisoft is not a
          party to litigation, a provisional attachment, or a provisional
          disposition case.

2.   Trend Micro may immediately cancel this Agreement in the event InfoS
     violates the provisions of the preceding Article. In addition, in such
     instances, Trend Micro may seek jointly and severally from InfoS and Nihon
     Unisoft compensation of damages suffered as the result of such breach.


Article 3  Designation of Purchase Parties

Trend Micro may, at its own discretion, designated its subsidiary companies as
the parties purchasing the Shares.  In such instances, InfoS and Nihon Unisoft
shall treat the subsidiaries designated by Trend Micro as the concerned parties.


Article 4  Confidentiality


Trend Micro, InfoS and Nihon Unisoft shall exercise the same degree of care
afforded their own confidential information with regard to the existence and
content of this Agreement as well as the confidential information of the other
parties obtained with regard to this Agreement, and shall not disclose or
divulge the same to a third party without the prior written consent of all other
parties.


Article 5  Cancellation of Agreement


In the event any party is in breach of this Agreement, and fails to correct said
breach within 10 days after written notice from another party requesting the
correction thereof, the other party may cancel this Agreement.  However, the
exercise of the cancellation right under this Article shall not preclude the
seeking of compensation of damages.
<PAGE>

Article 6  Assignment

The parties to this Agreement may not transfer their rights or obligations under
this Agreement to a third party without the prior written consent of the other
parties.


Article 7  Nullification of Prior Agreement


All parties to this Agreement hereby agree that, simultaneously with execution
of this Agreement, that certain "Stock Purchase and Sale Agreement " executed by
and among Trend Micro, InfoS and Nihon Unisoft on January 25, 2000 shall be null
and void.


Article 8  Agreed Jurisdiction


Trend Micro, InfoS and Nihon Unisoft hereby agree that the Tokyo District Court
shall be the court of first instance having exclusive jurisdiction over all
disputes arising from or in relation to this Agreement.


IN WITNESS of this Agreement, three originals hereof are created, and upon the
names and seals of each of Trend Micro, InfoS and Nihon Unisoft, one original
hereof shall be retained by each.


     February 22, 2000

     Odakyu Southern Tower 10F. 2-2-1 Yoyogi, Shibuya-ku, Tokyo
     Trend Micro Incorporated
     Chang Ming Jung, Representative Director


     InfoS:

Nihon Unisoft:


<PAGE>

                                                                    EXHIBIT 21.1


                           TREND MICRO SUBSIDIARIES

1.   Trend Micro Incorporated
     (Taiwan)

2.   Trend Micro Inc.
     (U.S.A.)

3.   Trend Korea Inc.
     (South Korea)

4.   Trend Micro Deutschland GmbH
     (Germany)

5    Trend Micro Europe Srl
     (Italy)

6.   Trend Micro Australia Pty. Ltd.
     (Australia)

7.   Trend Micro do Brasil, Ltda.
     (Brazil)

8.   Trend Micro France S.A.
     (France)

9.   Trend Micro Hong Kong Limited
     (Hong Kong)

10.  Trend Micro Incorporated Sdn. Bhd.
     (Malaysia)

11.  Trend Micro (UK) LTD
     (United Kingdom)

12.  Trend Latinoamerica de Mexico S.A. de c.v.
     (Mexico)

13.  ipTrend, Incorporated
     (Japan)

14.  Nihon Unisoft Corporation
     (Japan)

<PAGE>

                                                                    EXHIBIT 23.3


                      CONSENT OF INDEPENDENT ACCOUNTANTS


We hereby consent to the use in the Prospectus constituting part of this
Amendment to the Registration Statement on Form F-1 of our report dated April
25, 2000 relating to the financial statements and the Financial Statement
Schedule II of Trend Micro Incorporated, which appear in such Amendment to the
Registration Statement.  We also consent to the references to us under the
headings "Summary Consolidated Financial Information", "Selected Consolidated
Financial Information" and "Experts" in such Amendment to the Registration
Statement.



/s/  PricewaterhouseCoopers

PricewaterhouseCoopers
Tokyo, Japan
May 24, 2000


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