Mitsui Sumitomo Insurance Group


Mitsui Sumitomo Insurance Group Holdings, Inc. is a Japanese insurance holding company headquartered in Tokyo, Japan.
MSIG was formed in 2001 from the merger of Mitsui Marine & Fire Insurance Co. and The Sumitomo Marine & Fire Insurance. In 2010, April Aioi Insurance Co., Ltd., Nissay Dowa General Insurance Co., Ltd., merged into MSIG, making the group's name changed in to MS&AD Insurance Group Holdings, Inc.. According to this business integration, MS&AD has become the largest property insurance company in Japan, with market share of 33% in 2013.
On 8 September 2015, it was announced that Mitsui Sumitomo had agreed to buy the UK insurance firm Amlin for £3.5bn.

Group companies

Non-life insurance

  • Mitsui Sumitomo Insurance Co

Life insurance

  • Mitsui Sumitomo Kirameki Life Insurance Co
  • Mitsui Sumitomo MetLife insurance Co

Companies not based in Japan

Financial services

Risk-related businesses

  • InterRisk Research Institute & Consulting
  • Mitsui Sumitomo Insurance Care Network Co
  • American Appraisal Japan Co

Annual Reports


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