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

Cyber Risk Insurance (Mitsui Sumitomo)

by Mitsui Sumitomo Insurance Co., Ltd.
B2BADirectBroker onlyDomestic onlyJapanese
Last updated 07.05.2026

Cyber Risk Insurance (Mitsui Sumitomo) is a cyber insurance product underwritten by Mitsui Sumitomo Insurance Co., Ltd. (MS&AD Insurance Group Holdings (Japan)), available in Japan. It is aimed at small and medium-sized businesses, mid-market companies and large enterprises. Coverage limits reach up to Up to ¥100M damages indemnity. Up to ¥10M profit damages. Policyholders get 5 bundled proactive services — Phishing simulation, Training & awareness, Risk assessment and Incident response, among others — designed to reduce breach risk before a claim ever happens. The carrier holds an AM Best rating of A (Excellent) – AM Best. It is distributed through insurance brokers.

Product Details§ 01

Max Insurance Limit
Up to ¥100M damages indemnity. Up to ¥10M profit damages
Min Premium / Revenue
Up to ¥1B in revenue. Manufacturing: ¥60K to ¥339K. Retail: ¥60K to ¥407K. IT: ¥61K to ¥1.8M
Market Focus
SME, Mid-market, Large
AM Best Rating
A (Excellent) – AM Best
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

24/7 Crisis Hotline
Via policy documentation.

Frequently asked questions§ 04

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Who is Cyber Risk Insurance (Mitsui Sumitomo) designed for?

Cyber Risk Insurance (Mitsui Sumitomo) by Mitsui Sumitomo Insurance Co., Ltd. targets small and medium-sized businesses, mid-market companies and large enterprises in Japan. Geographic scope: Domestic only..

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What proactive security services are included with Cyber Risk Insurance (Mitsui Sumitomo)?

The policy bundles 5 proactive services: Phishing simulation, Training & awareness, Risk assessment, Incident response and Risk platform / portal. These preventive services are typically included in the premium.

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Does Cyber Risk Insurance (Mitsui Sumitomo) help with NIS2 or DORA compliance?

Mitsui Sumitomo Insurance Co., Ltd. indicates the following NIS2/DORA support for this product: Not applicable..

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How can I buy Cyber Risk Insurance (Mitsui Sumitomo) in Japan?

Cyber Risk Insurance (Mitsui Sumitomo) is sold through insurance brokers — broker contact: https://www.ms-ins.com/business/indemnity/pd-protector/. Compare it with alternatives in Japan on Ryskly before approaching a broker.