Mitsui Sumitomo

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Insurer secondees leaked Toyota employee and partner information — Report

April 23 2026

Secondees from Tokio Marine & Nichido, Mitsui Sumitomo, and Aioi Nissay Dowa, may be in breach of information and competition laws.

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Mitsui Sumitomo completes 15% stake acquisition in W. R. Berkley

March 5 2026

MSI says it intends to pursue strategic opportunities with W. R. Berkley following the investment.

Mitsui Sumitomo appoints new CEO ahead of Aioi Nissay Dowa merger

February 3 2026

Hiroshi Umiyama will become president and CEO, replacing Shinichiro Funabiki.

MSAD to cut domestic bases to 240 ahead of 2027 Mitsui SumitomoAioi merger

MS&AD to consolidate number of local offices ahead of 2027 Mitsui Sumitomo–Aioi merger

January 12 2026

MS&AD plans to reduce its local operating branches in Japan from about 360 to 240 by April 2027.

Mitsui Sumitomo Insurance to buy 18% stake in Barings

November 18 2025

Japanese insurer has agreed a US$1.44bn deal to acquire a stake in US asset manager, aiming to diversify its investment income and boost capital efficiency as part of broader global expansion plans.

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AM Best upgrades MS First Capital to A+ on strong operating performance

October 14 2025

Singaporean insurer continues to benefit from a well-diversified underwriting portfolio and strong regional ties.

japans-non-life-insurers-saw-solar-power-payouts-reach-us304m-due-to-disasters-theft-report

Japanese insurers see solar power claims payouts surge to US$304m due to nat cats, theft: Report

September 10 2025

Leading Japanese non-life insurers have seen a marked rise in solar power claims in fiscal 2024, with the trend expected to continue.

Mizuho Bank plans to cease hiring seconded insurance staff after data breaches

August 19 2025

The move follows regulatory scrutiny after millions of customer records were leaked from major Japanese insurers.

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Japan's Mitsui Sumitomo to acquire majority stake in W&I specialists Time Machine Underwriters

July 10 2025

MSI says it plans to make the MGA a wholly owned subsidiary after it first completes the majority stake purchase.

Mitsui Sumitomo agrees to purchase 15% of W.R. Berkley's stock

March 28 2025

Strategic alliance looks to leverage MSI's international reach, Berkley's speciality expertise.

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