Notice on Determination of Details of Stock Options (Stock Acquisition Rights) to be Allotted

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:Yutaka Tsuchiya Executive Vice president
Public Affairs Phone 81-3-3817-5120

Eisai Co., Ltd. (Headquarters: Tokyo, President & CEO: Haruo Naito, “Company”) announced today that the details of Stock Options to be allotted to Directors, Executive Officers and employees of the Company in accordance with the resolution of the Board of Directors’ Meeting (see III. below) held on June 21, 2011 have been determined as follows:

I. Eisai Co., Ltd. No. 10-1 Stock Acquisition Rights (Directors and Executive Officers)

1. Allotment date of stock acquisition rights:

July 7, 2011

2. Total number of shares included in the allotment of stock acquisition rights:

1,420

3. Recipients and the number of recipients of the allotment and the number of stock acquisition rights allotted

10 Directors 400
18 Executive officers  1,020

4. Class and number of shares to be issued or transferred upon exercise of stock acquisition rights

Shares of common stock142,000
(The number of shares to be issued or transferred upon exercise of each stock acquisition right shall be 100 shares.)

5. Amount of assets to be contributed upon exercise of stock acquisition rights

The amount to be paid for each share (the Exercise Price) ¥3,140
The amount to be paid for each stock acquisition right ¥314,000

(The Exercise Price is closing price of the common stock in the regular trading thereof on the Tokyo Stock Exchange as of the allotment date of July 7 2011)

II. Eisai Co., Ltd. No. 10-2 Stock Acquisition Rights (Employees)

1. Allotment date of stock acquisition rights:

July 7, 2011.

2. Total number of shares included in the allotment of stock acquisition rights:

1,690

3. Recipients and the number of recipients of the allotment and the number of Stock acquisition rights allotted.

4 senior group officers 160
16 group officers 480
35 employees 1,050

4. Class and number of shares to be issued or transferred upon exercise of stock acquisition rights

Shares of common stock169,000
(The number of shares to be issued or transferred upon exercise of each stock acquisition right shall be 100 shares.)

5. Amount of assets to be contributed upon exercise of stock acquisition rights

The amount to be paid for each share (the Exercise Price) ¥3,140
The amount to be paid for each stock acquisition right ¥314,000

(The Exercise Price is closing price of the common stock in the regular trading thereof on the Tokyo Stock Exchange as of the allotment date of July 7 2011)

III. Contents of the resolution of board of directors on June 21, 2011.

  1. Based on the resolution of the Compensation Committee Meeting on May 13, 2011 and Article 240, Paragraph 1 and Article 238, Paragraph 2 of the Corporate Law, the Company shall issue “Eisai Co., Ltd. No. 10-1 Stock Acquisition Rights” on July 7, 2011, as compensation to directors and executive officers, in accordance with Article 238, Paragraph 1 of the Corporate Law.
  2. Based on the mandate approved at the 99th General Meeting of Shareholders held today (June 21, 2011) and Article 238 Paragraph 2 and Article 239 Paragraph 1 Part 1 and 2 of the Corporate Law, the Company shall issue “Eisai Co., Ltd. No. 10-2 Stock Acquisition Rights” on July 7, 2011, in accordance with Article 238, Paragraph 1 of the Corporate Law to give an incentive to its employees to increase further value of the Company.