Announcement of Change in Accounting Methods

Tokyo, Japan - February 15, 2001 - Trend Micro Inc. (NASDAQ:TMIC, Tokyo TSE:4704), a leading provider of antivirus and Internet content security software, today announced that the board of directors of the Company resolved, at its meeting held on February 15, 2001, that the method of the sales revenue recognition should be changed as follows:

Description of the change

The Company's sales revenues are mainly derived from licensing of its products, upgrading of its products and virus patterns files and post-contract support including customer support. Until the end of the fiscal year ended December 31, 2000, the Company had recognized sales revenues from customer support (which was included in post-contract support) at the beginning of the relevant support period. Effective from this fiscal year ending December 31, 2001, the method of the revenue recognition has been changed and sales revenues from customer support are deferred over the relevant support period.

The purpose of this change is to disclose transactions more properly. The Company's financial statements prepared in accordance with the U.S. GAAP and filed with the SEC have already reflected this change.

Influence on the Company's consolidated results

At the beginning of this fiscal year ending December 31, 2001, ¥1,470 million on a consolidated basis and ¥1,270 million on a non-consolidated basis were stated as unusual losses carried over from the previous fiscal year. In addition, as a result of this change, sales for this fiscal year will be decreased by the amount of an increase in deferred revenues during the period.