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News Release

FOR IMMEDIATE RELEASE
May 31, 2016

Notification Regarding the Completion of the Disposal of Treasury Stock Through Third-Party Allotment in Accordance with the Continuation of Performance-Related Stock Compensation System

Listed Company Name:  Eisai Co., Ltd.
Representative: Haruo Naito
Representative Corporate
Officer and CEO
Headquarters: 4-6-10 Koishikawa,
Bunkyo-ku, Tokyo
Securities Code: 4523
Listed Location: First Section of the
Tokyo Stock Exchange
Inquiries: Sayoko Sasaki
Vice President,
Corporate Affairs
Phone 81-3-3817-5120

Eisai Co., Ltd. (Headquarters: Tokyo, Representative Corporate Officer and CEO: Haruo Naito, “the Company”) hereby announces that the payment procedures for the disposal of treasury stock by means of third-party allotment with The Master Trust Bank of Japan, Ltd. (Trust Account for Officers' Compensation Board Incentive Plan [BIP]) as the allottee was completed today in accordance with the resolution made at the Board of Directors meeting held on May 13, 2016.

Remarks:

Overview of the disposal

(1) Type and number of shares disposed of: 39,000 shares of the common stock of the Company
(2) Disposal price: 6,939 yen per share
(3) Total disposal price: 270,621,000 yen
(4) Disposal method: Third-party allotment
(5) Allottee: The Master Trust Bank of Japan, Ltd. (Trust Account for Officers' Compensation Board Incentive Plan [BIP])
(6) Paid-in date: May 31, 2016
(7) Treasury stock following the disposal: 10,516,842 shares

* The amount of treasury stock following the disposal is based on the amount of treasury stock registered as of March 31, 2016.

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