For Immediate Release

Company name: DAIICHI SANKYO COMPANY, LIMITED
Representative: Joji Nakayama, President and CEO
(Code no.: 4568, First Section of Tokyo, Osaka and Nagoya Stock Exchanges)
Please address inquiries to Toshiaki Sai, Corporate Officer,
Vice President, Corporate Communications Department
Telephone: +81-3-6225-1126 (Public Relations)
+81-3-6225-1125 (Investor Relations)
http://www.daiichisankyo.com/

Daiichi Sankyo Included in the Dow Jones Sustainability Index Asia Pacific

Tokyo, Japan (September 29, 2010) – Daiichi Sankyo Company, Limited today announced that it has been included for the first time in the Dow Jones Sustainability Index Asia Pacific (hereafter, DJSI Asia Pacific).

The Dow Jones Sustainability Indexes (DJSI) are the global indexes from Dow Jones of the USA and Sustainable Asset Management (SAM) of Switzerland which track the financial performance of the leading sustainability-driven companies worldwide, evaluating them thorough analysis of corporate economic, environmental and social performance. These indexes are an important investment standard for investors who have an interest in corporate social responsibility (CSR).

The DJSI Asia Pacific comprises the leading companies in terms of sustainability from the developed markets in Asia Pacific. Out of the 600 biggest companies, the DJSI Asia Pacific has selected the top 141 regional sustainability leaders, including 71 Japanese companies.

As a company trusted by its stakeholders, who have a vested interest in its sustained growth and success, the Daiichi Sankyo Group will continue to make every effort to put into practice its mission of being “dedicated to the creation and supply of innovative pharmaceutical products to address the diversified, unmet medical needs of patients in both mature and emerging markets.”