AIG損保 (AIG General Insurance) vs 三井住友海上 (Mitsui Sumitomo Insurance): which is better? Comparison 2026

By our public methodology AIG損保 (AIG General Insurance) scores 89 out of 100 and 三井住友海上 (Mitsui Sumitomo Insurance) scores 86. Below: the factors and facts where they differ, each fact with its source.

Insurance companies in Japan 2026: a ranking built on verified facts How we rank

2

AIG損保 (AIG General Insurance)

89/100
3

三井住友海上 (Mitsui Sumitomo Insurance)

86/100

Score breakdown

AIG損保 (AIG General Insurance)三井住友海上 (Mitsui Sumitomo Insurance)
Reliability10075
Service85100
Products83100
Transparency7575

Pros and cons

AIG損保 (AIG General Insurance)

  • Long track record as a licensed insurer
  • Wide range of products for private customers
  • Holds a financial strength rating from a recognised agency
  • Publishes annual financial reports

三井住友海上 (Mitsui Sumitomo Insurance)

  • Long track record as a licensed insurer
  • Wide range of products for private customers
  • Publishes annual financial reports
  • Policies can be bought online

Facts side by side

FactAIG損保 (AIG General Insurance)三井住友海上 (Mitsui Sumitomo Insurance)
Licensed since1946 aig.co.jp1918 ms-ins.com
Buy a policy onlineYes aig.co.jpYes ms-ins.com
Rating from a rating agencyYes aig.co.jpNot verified
Financial reports onlineYes aig.co.jpYes ms-ins.com
Part of a groupYes aig.co.jpYes ms-ins.com
Report a claim onlineYes aig.co.jpYes ms-ins.com
Mobile appNot verifiedYes ms-ins.com
24/7 phone lineYes aig.co.jpYes ms-ins.com
Offices in the country92 aig.co.jp352 ms-ins.com
Retail lines offered (of 6)5 aig.co.jp6 ms-ins.com
Policy terms onlineYes aig.co.jpYes ms-ins.com
Complaints procedure publishedYes aig.co.jpYes ms-ins.com

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