🇯🇵 Japan
Mitsui Sumitomo Insurance Co., Ltd. (MS&AD Insurance Group Holdings (Japan))

Cyber Risk Insurance (Mitsui Sumitomo)

by Mitsui Sumitomo Insurance Co., Ltd.
B2BADirect—Broker onlyDomestic onlyJapanese
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Last updated Apr 2026

Product Details§ 01

Max Insurance Limit
Bespoke.
Market Focus
All sizes; all industries.
AM Best Rating
A (Excellent) – AM Best (MS&AD Insurance Group)
MGA / Direct
No – Direct insurer.
Policy Language
Japanese
NIS2 / DORA Support
Not applicable.
War Exclusion
War and nation-state cyber exclusion applied (LMA-aligned).
Geographic Scope
Domestic only.
Broker Only
Yes

Advantages & Limitations§ 02

Advantages

  • Mitsui Sumitomo: Japan's #2 non-life insurer (part of MS&AD; ~¥3.1T combined NLP with Aioi Nissay Dowa 2024).
  • Domestic Japanese cyber insurance; bundles IR retainers with specialist firms.
  • Coverage: cyber attack response, data breach, BI loss, ransomware, legal costs, data protection compliance.
  • Aioi Nissay Dowa (MS&AD sub) acquired cyber risk analytics firm Sep 2023 — strengthening underwriting.

Limitations

  • Japan domestic product.

Contact & Response§ 03

Customer Contact
https://www.ms-ins.com/business/cyber/
24/7 Crisis Hotline
Via policy documentation.
Broker Contact
https://www.ms-ins.com/business/cyber/