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News Release

Feb 22, 2002


  Listed Stock Name: Eisai Co., Ltd.
  President & CEO: Mr. Haruo Naito
  Head Office Location: 4-6-10 Koishikawa Bunkyo-ku, Tokyo
  Securities Code: 4523
  Listed Locations: First Sections of the Tokyo Stock Exchange
& the Osaka Securities Exchange
  Inquiries: Mr. Nobuo Deguchi
Corporate Officer
Public Relations & Legal Affairs
Phone 81-3-3817-5190

Notice of Acquisition of the Company's Own Shares through ToSTNeT-2

Eisai Co. Ltd. announces the selection and acquisition method of own shares in accordance with article 3 of the former "Law for Special Exceptions Concerning the Retirement of Stock" applied under Paragraph 4 of Article 3 of Supplementary Provisions to the Law Concerning a Partial Amendment to the Japanese Commercial Code (Law. No. 79, 2001).

I1 . Method of Acquisition

Shares will be purchased at the Tokyo Stock Exchange at 8:45 on the morning of February 25, 2002 using a closing price of yen3,030 per share as of today, February 22, 2002. Transactions (closing price transaction) will be made through ToSTNeT-2, and shall not be made by other trading systems or at another time. The purchase order will be valid only at the time designated for transactions.

II2 . Contents of the Acquisition
(1) Share Type Acquisition Common Stock
(2) Number of Shares to be Acquired 5 million shares (maximum)
(Note 1)   This number is final. Depending on market fluctuations and other factors, a part or all of the transaction may not be performed.
  (Note 2) The purchase is to be made by a selling order corresponding to the number of shares planned to be acquired.

III3 . Acquisition Disclosure

When the purchase has been completed at 8:45 on February 25, 2002, the results of the transaction will be disclosed.


Details of the decision related to this acquisition (as announced on February 22, 2002).
• Share Type Acquisition
Common Stock

• Number of Shares to be Acquired
5 million shares (maximum)

• Total Value of Shares to be Acquired
yen18 billion (maximum)