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News Release

FOR IMMEDIATE RELEASE
August 20, 2002

Notice Concerning Acquisition of the Company's Own Shares in the Market
(Based on Japanese Commercial Law 210 Concerning Share Acquisition)

  Listed Stock Name : Eisai Co., Ltd.
  Head Office Location : 4-6-10 Koishikawa Bunkyo-ku, Tokyo
  President & CEO : Mr. Haruo Naito
  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 (Vice President)
Public Relations & Legal Affairs
Phone 81-3-3817-5190

Notice Concerning Acquisition of the Company's Own Shares in the Market
(Based on Japanese Commercial Law 210 Concerning Share Acquisition)


Eisai Co., Ltd. announces the acquisition of its own shares in the market in accordance with Japanese Commercial Law 210. Details are noted below.
1. Term of acquisition From August 1 to August 19, 2002
2. Total number of shares acquired 3 million shares
3. Total amount of acquisition yen9,225,305,500
4. Method of acquisition Market buying at the Tokyo Stock Exchange

(Reference)
1. Authorization of the acquisition of the Company's shares at the General Shareholders' Meeting held on June 27, 2002.

(1) Share type acquisition Common stock of Eisai Co., Ltd.

(2) Total number of shares to be acquired 10 million shares (Maximum)

(3) Total value of shares to be acquired yen30 billion (Maximum)
2. Total number of shares acquired on or after the date of the General Shareholders' Meeting held on June 27, 2002.

(1) Total number of shares acquired 3 million shares

(2) Total amount of acquisition yen9,225,305,500