---
title: "日本地震再保険"
aliases: ["日本地震再保", "Japanese Earthquake Reinsurance", "Japan Earthquake Reinsurance", "日本地震再保険株式会社", "JER"]
domain: non-life-insurers
created: 2026-05-21
last_updated: 2026-07-30
last_tended: 2026-07-30
review_by: 2026-11-21
confidence: likely
tags: [JapanFG, insurance, non-life-insurance, reinsurance, earthquake-insurance, operating-company]
status: active
sources:
  - "https://www.fsa.go.jp/menkyo/menkyoj/songai.pdf"
  - "https://www.sonpohogo.or.jp/outline/member-companies.html"
  - "https://www.nihonjishin.co.jp/"
---

# 日本地震再保険


## Wiki route

This entry sits under [[non-life-insurers/INDEX|non-life-insurers INDEX]]. Read it against [[non-life-insurers/toa-reinsurance|トーア再保険]] for peer / contrast context and [[insurance/INDEX|insurance index]] for the broader system / regulatory boundary.

## TL;DR

日本地震再保険株式会社は、金融庁の損害保険会社免許一覧に掲載される earthquake reinsurance company。Japan's public-private residential earthquake insurance scheme を理解する上で中心的な operating-company anchor で、concept page は [[insurance/natcat-reinsurance-japan]] に置く。

## 1. License / group boundary

The following table is scoped to public primary sources (fsa.go.jp, sonpohogo.or.jp, nihonjishin.co.jp). It restates licence / structure / product boundaries from those materials and does not invent market share, ranking, or unstated numerical claims. ^[source:fsa.go.jp; sonpohogo.or.jp; nihonjishin.co.jp]

| Item | Notes |
|---|---|
| Legal name | 日本地震再保険株式会社 |
| License route | Insurance Business Act non-life insurance company; FSA non-life insurer list |
| Protection scheme | Non-Life Insurance Policyholders Protection Corporation member |
| Business type | Earthquake reinsurance |
| Wiki role | Company anchor for Japan earthquake insurance reinsurance scheme |

## 2. Operating model

Japan's residential earthquake insurance is not a normal private-only catastrophe product. Primary insurers including [[non-life-insurers/tokio-marine-nichido-fire|東京海上日動]], [[non-life-insurers/mitsui-sumitomo-insurance|三井住友海上]], and [[non-life-insurers/sompo-japan-insurance|損保ジャパン]] cede earthquake risk into a public-private reinsurance structure described at [[insurance/natcat-reinsurance-japan|natcat reinsurance Japan]], and 日本地震再保険 sits at the operational center of that scheme.

## 3. Why this page matters

- Separates the company page from the broader natural-catastrophe concept page.
- Key anchor for public-private earthquake insurance analysis.
- Registry-backed D5 specialty / reinsurance page.

## Related

- [[insurance/natcat-reinsurance-japan]]
- [[non-life-insurers/toa-reinsurance]]
- [[non-life-insurers/tokio-marine-nichido-fire]]
- [[non-life-insurers/mitsui-sumitomo-insurance]]
- [[non-life-insurers/sompo-japan-insurance]]

## Sources

- FSA: non-life insurance company license list, as of 2026-04-01.
- Non-Life Insurance Policyholders Protection Corporation of Japan: member-company list, as of 2026-04.
- 日本地震再保険 official website.