General Reinsurance Japan Branch
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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
| Item | Notes |
|---|---|
| Legal name | General Reinsurance AG Japan Branch (ジェネラル再保険会社 日本支店) |
| Parent | General Re Corporation → Berkshire Hathaway Inc. (US Nebraska, NYSE: BRK.A / BRK.B) |
| License route | Insurance Business Act foreign non-life insurers, etc. / FSA foreign non-life license category (life reinsurance follows a separate route) |
| Protection scheme | As a reinsurance specialist, outside the scope of the Non-Life Insurance Policyholders Protection Corporation |
| Business type | P&C Reinsurance (Gen Re) + Life & Health Reinsurance (Gen Re Life) |
| Wiki role | Foreign reinsurer Japan branch — Berkshire Hathaway insurance pillar |
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)
[!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.