- Not to be confused with Sumitomo Life Insurance Company, a mutual insurance organization.
MSIG headquarters in Tokyo, Japan
Mitsui Sumitomo Insurance Group Holdings, Inc. (三井住友海上グループホールディングス株式会社 Mitsui Sumitomo Kaijō Gurūpu Hōrudingusu Kabushiki-Kaisha) is a Japanese insurance holding company headquartered in Tokyo, Japan.
Formed in 2001 from the merger of Mitsui Marine & Fire Insurance Co. and Sumitomo Marine & Fire Insurance, it is the third-largest property insurance company in Japan behind Tokio Marine and Sompo Japan, with market share of 18.6% in 2007.
Group companies 
Non-life insurance 
Life insurance 
Companies not based in Japan 
Financial services 
External links