---
title: "あいおいニッセイ同和損害保険"
aliases: ["あいおいニッセイ同和", "Aioi Nissay Dowa", "Aioi Nissay Dowa Insurance", "あいおいニッセイ同和損害保険株式会社"]
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, msad, 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.aioinissaydowa.co.jp/"
---

# あいおいニッセイ同和損害保険


## Wiki route

This entry sits under [[non-life-insurers/INDEX|non-life-insurers INDEX]]. Read it against [[non-life-insurers/mitsui-sumitomo-insurance|三井住友海上火災保険]] for peer / contrast context and [[insurance/INDEX|insurance index]] for the broader system / regulatory boundary.

## TL;DR

あいおいニッセイ同和損害保険株式会社は、[[non-life-insurers/msad]] group の non-life insurance operating company。金融庁の損害保険会社免許一覧に掲載され、MS&AD group 内では [[non-life-insurers/mitsui-sumitomo-insurance]] と別の legal-entity and channel boundary を持つ。

## 1. License / group boundary

The following table is scoped to public primary sources (fsa.go.jp, sonpohogo.or.jp, aioinissaydowa.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; aioinissaydowa.co.jp]

| Item | Notes |
|---|---|
| Legal name | あいおいニッセイ同和損害保険株式会社 |
| License route | Insurance Business Act non-life insurance company; FSA non-life insurer list |
| Protection scheme | Non-Life Insurance Policyholders Protection Corporation member |
| Group boundary | [[non-life-insurers/msad]] non-life operating company |
| Wiki role | MS&AD domestic-retail / motor / regional-channel non-life arm |

## 2. Operating model

あいおいニッセイ同和 is important because MS&AD is not a one-operating-company group. The legal-entity split between Aioi Nissay Dowa and Mitsui Sumitomo Insurance affects agency networks, brand, product distribution, integration risk, and possible group reorganization analysis.

## 3. Why this page matters

- Completes the MS&AD domestic non-life operating-company split.
- Key peer for [[non-life-insurers/tokio-marine-nichido-fire]] and [[non-life-insurers/sompo-japan-insurance]].
- Registry-backed D3 non-life major page.

## Related

- [[non-life-insurers/msad]]
- [[non-life-insurers/mitsui-sumitomo-insurance]]
- [[life-insurers/mitsui-sumitomo-aioi-life]]
- [[insurance/natcat-reinsurance-japan]]
- [[insurance/INDEX]]

## 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.
- あいおいニッセイ同和損保 official website.