For Immediate Release

Company name: DAIICHI SANKYO COMPANY, LIMITED
Representative: Takashi Shoda, President and Representative Director
(Code no.: 4568, First Section, Tokyo, Osaka and Nagoya Stock Exchanges)
Please address inquiries to Toshiaki Sai, General Manager,
Corporate Communications Department
Telephone: +81-3-6225-1126
http://www.daiichisankyo.com/

DAIICHI SANKYO to Acquire Own Shares

Tokyo, June 27, 2008- DAIICHI SANKYO COMPANY, LIMITED has announced today that its Board of Directors reached a decision to acquire shares issued by the company pursuant to Article 156 of the Corporate Code (Act No. 86 of 2005), applied for the situation provided in Article 165,Paragraph 3. This acquisition is to ensure more efficient use of capital and reward shareholders.

Details of Share Acquisition
1. Type
   The shares to be acquired are ordinary shares.
2. Quantity
   The maximum number of shares to be acquired is 15 million shares,corresponding to 2.04% of outstanding shares.
3. Price
   The maximum total acquisition price is 50.0 jp yen billion.
4. Acquisition period
   The shares will be acquired between July 1 and August 28, 2008.