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News Release

October 4, 2001

Notice of Consolidated Interim Period (April 1, 2001 - September 30, 2001)
Business Results Forecast Revision

Listed Stock Name: Eisai Co., Ltd.
President and CEO: Mr. Haruo Naito
Head Office Location: 4-6-10 Koishikawa Bunkyo-ku, Tokyo
Securities Code: 4 5 2 3
Listed Locations: First Sections of the Tokyo Stock Exchange & the Osaka Securities Exchange
Inquiries: Mr. Nobuo Deguchi
  Corporate Officer in charge of Public Relations & Legal Affairs
  Phone 81-3-3817-5190

Notice of Consolidated Interim Period (April 1, 2001 - September 30, 2001)
Business Results Forecast Revision

For the Interim Period ending September 2001 (April 1, 2001 - September 30, 2001), a consolidated business results forecast was made on May 17, 2001 at the Financial Results Announcement for Fiscal Year 2000, and the table below notes a revision to those forecasts.

I . Consolidated business results forecast revision for the interim period ended September 2001.(April 1, 2001 - September 30, 2001)

Unit: Yen Millions, %percent

Net Sales Ordinary Income Net Income
Previously Announced Forecast (A)
(May 17, 2001 Announcement)
yen190,000 yen32,500 yen17,000
Revised Forecast (B) yen209,000 yen39,000 yen19,000
Increase/Decrease (B) - (A) yen19,000 yen6,500 yen2,000
%percent Increase 10.0%percent20.0% 11.8%percent
Interim Period Ended
September 2000 Business Results
yen174,947 yen31,856 yen8,865
Note: Operating Income is forecast to be yen37,500 million.

II . The reasons for the revision are noted below:

Sales of the products, ARICEPT and ACIPHEX/PARIET in the U.S. and Europe have increased favorably; the exchange rates (yen115/US$, yen105/EURO) to the Japanese yen have been higher than expected among others which have resulted in a forecast results revision for the interim period. There is no change to the forecast results made previously for non-consolidated accounts.

With respect for the results forecast for fiscal year period, after considering conditions applicable for the remaining half year period, an announcement will be made at the time of the Interim Period Financial Results Announcement in November.

Note: The forecast numbers are made according to information currently available; actual results may vary