Mitsui Sumitomo Insurance Company, Limited (the “Company”) hereby announces that pursuant to Article 156 of the Companies Act of Japan as modified by Article 165, Paragraph 3, of the Act, the Company has repurchased its own shares by market transactions and has completed the repurchase resolved at the meeting of the Board of Directors held on January 31, 2008, as follows:

	(1)	Period of repurchase:     From February 25, 2008, to March 12, 2008
	(2)	Type of shares repurchased:     Shares of common stock of the Company
	(3)	Total number of shares repurchased:     6,402,000 shares
	(4)	Aggregate amount of repurchase cost:     JPY 6,998,920,000
	(5)	Method of repurchase:     Market transaction on the Tokyo Stock Exchange

(Reference 1)

Details of repurchase resolved at the meeting of the Board of Directors held on January 31, 2008:

	(1)	Type of shares to be repurchased:     Shares of common stock of the Company
	(2)	Total number of shares to be repurchased:     8,000,000 shares (Maximum)     (Approximately 0.5% of the shares issued)
	(3)	Aggregate amount of repurchase cost:     JPY 7,000,000,000 (Maximum)
	(4)	Period of repurchase:     From February 1, 2008, to March 24, 2008

(Reference 2)

Total number and aggregate amount of Company’s own shares repurchased under the resolution:

	(1)	Total number of shares repurchased:     6,402,000 shares
	(2)	Aggregate amount of repurchase cost:     JPY 6,998,920,000