General Reinsurance Japan Branch

Wiki route

This entry sits under non-life-insurers INDEX. Read it against RGA Reinsurance Company Japan Branch as a US-headquartered peer (RGA: life specialist; Gen Re: P&C + life via subsidiary), and contrast with Munich Re Japan Branch / Swiss Re Japan Branch as the European “Big 2”. Domestic peer remains Toa Reinsurance and broader system is nat-cat reinsurance Japan.

TL;DR

The Japan branch of General Reinsurance AG / General Re Corporation. A world-leading reinsurance company that is a wholly owned subsidiary of Berkshire Hathaway 100%, listed on the FSA non-life insurance company license list (foreign non-life insurers, etc.). It is a traditional global reinsurance brand alongside Munich Re / Swiss Re, known for its conservative underwriting discipline under the Warren Buffett regime.

1. License / group boundary

The following table is scoped to public primary sources (genre.com, fsa.go.jp). It restates licence / structure / product boundaries from those materials and does not invent market share, ranking, or unstated numerical claims. ^↗

2. Business lines in Japan

• P&C Treaty Reinsurance — treaty reinsurance for earthquake / typhoon catastrophe, property, and liability
• Casualty / Liability Reinsurance — long-tail reinsurance for D&O, cyber, PL, etc.
• Specialty lines — Marine, Aviation, Engineering, Surety
• Life & Health Reinsurance — life / medical reinsurance for death, medical, and disability (Gen Re Life via separate structure)
• Risk consulting — technical-assessment support for underwriting risk

4. Why this page matters

• A Japan-contact anchor for the Berkshire Hathaway insurance conglomerate — part of the “Berkshire in Japan” map alongside Berkshire’s Japanese asset investments (the 5 major trading-house shares mitsubishi-corporation, etc.)
• An anchor alongside rga-japan as a US-affiliated foreign reinsurer
• A system link connecting natcat-reinsurance-japan with the primary mega non-life insurer group

Related

• INDEX
• rga-japan
• munich-re-japan
• swiss-re-japan
• hannover-re-japan
• toa-reinsurance
• japan-earthquake-reinsurance
• natcat-reinsurance-japan
• INDEX

Sources

• Gen Re official: Japan location page (https://www.genre.com/about-us/locations/japan, see 2026-05-24)
• FSA: 保険会社免許一覧 (https://www.fsa.go.jp/menkyo/hoken.pdf, see 2026-05 )
• FSA: 損害保険会社免許一覧 (including foreign non-life insurers, https://www.fsa.go.jp/menkyo/menkyoj/songai.pdf)

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[!info] Verification status confidence: likely. Gen Re’s capital relationship as a wholly owned subsidiary of Berkshire Hathaway 100% and the Japan branch’s registration under the FSA foreign non-life license category are based on public information. The history and current scope of business since the 1998 年 Berkshire acquisition are at an overview level.