6-K

FORM 6-K

SECURITIES AND EXCHANGE COMMISSION

450, 5th Street

Washington, D.C. 20549

REPORT OF FOREIGN PRIVATE ISSUER

Pursuant to Rule 13a-16 or 15d-16 of

the Securities Exchange Act of 1934

For the month of February, 2006

Daiichi Sankyo Company, Limited

(Translation of registrant’s name into English)

5-1, Nihonbashi 3-chome

Chuo-ku, Tokyo 103-8426

Japan

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

Form 20-F  þ            Form 40-F  ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):

Yes  ¨            No  þ

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):

Yes  ¨            No  þ

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes  ¨            No  þ

If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): N/A

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	DAIICHI SANKYO COMPANY, LIMITED
DATE: February 21, 2006	By:	/s/ Takashi Shoda
	Name:	Takashi Shoda
	Title:	President and Representative Director

EXHIBIT INDEX

Exhibit Number		Description of Exhibit
99.1	—	Press Release: “Future Business Prospects of the Hyperlipidemia Drug Pravastatin in the United States ”

EX-99.1

Exhibit 99.1

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 Toshio Takahashi, Corporate Officer in Charge,

Corporate Communications Department

Telephone: +81-3-6225-1126

Future Business Prospects of the Hyperlipidemia Drug Pravastatin in the United States

Tokyo, February 17, 2006 – DAIICHI SANKYO COMPANY, LIMITED has announced today that the exclusive sales period for the hyperlipidemia drug Pravachol® (Japanese brand name: Mevalotin®), that is supplied by its subsidiary Sankyo Co., Ltd. (President: Yasuhiro Ikegami; hereafter Sankyo) to Bristol-Myers Squibb Company (hereafter BMS), in the United States is coming to an end as of April 20, 2006, and an agreement has been reached between BMS and Watson Pharmaceuticals, Inc. for the sale of generic versions of Pravachol® within the United States.

Sankyo is supplying the active constituent for pravastatin to BMS, which is in turn selling it in the United States and throughout the world. Sankyo will continue to supply the active constituent of pravastatin through BMS.

Reference

BMS Web site: http://www.bms.com/

Watson Pharmaceuticals, Inc. Web site: http://www.watsonpharm.com/