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News Release

May 13, 2011

Proposed Change of Representative Officers

Listed Stock Name: Eisai Co., Ltd.
Director and President & CEO: Haruo Naito
Headquarters: 4-6-10 Koishikawa Bunkyo-ku, Tokyo
Securities Code: 4523
Listed Locations: First Sections of the Tokyo Stock Exchange
& the Osaka Securities Exchange
Inquiries: Yuji Matsue
Vice President
Corporate Communications
Phone 81-3-3817-5120

Eisai Co., Ltd. (Headquarters: Tokyo, President & CEO: Haruo Naito) resolved at its Board of Directors Meeting held on May 13, 2011 to propose the following change of Representative Officers, effective June 21, 2011.

1. Change of Representative Officers (effective June 21, 2011)
  (Retiring Executive Officers)
  Hideaki Matsui (currently, Executive Vice President (Representative Executive Officer), CFO, Head of Finance & Accounting HQ)
    *Nominee for New Director

2. Estimated Date of Retirement
  June 21, 2011