Reported breach

Sumitomo Life Insurance data breach

JPJapan · Insurance · 住友生命保険

ITmedia reported a data breach at Sumitomo Life Insurance (Japan) on 10 November 2026. It affected 80,000 users.

One of 3 organisations whose data was taken through NTT Data. The NTT Data breach →

People affected: 80,000users
Reported: 10 November 2026News report

What was exposed 1

Personal information

How it happened

Through: NTT Data NTTデータは11月9日、住友生命保険から構築・運用を受託しているシステムが不正アクセスを受け source · 3 organisations hit through NTT Data →
Way in: NTT Data NTT Data announced on November 9 that the system built and operated under commission from Sumitomo Life Insurance suffered unauthorized access source
Our translation from Japanese
NTTデータは11月9日、住友生命保険から構築・運用を受託しているシステムが不正アクセスを受け

Sources 1

News reportITmediaNTT Data, unauthorized access to system commissioned by Sumitomo Life "Vitality ... (our translation from Japanese)10 November 2026 · 80,000 users
Archived copy Wayback Machine, 10 November 2026

News reports are read by an AI model; every fact taken from an article was checked word for word against it, and anything it could not find was dropped. · Corrections and changes

If Sumitomo Life Insurance had your data

Look for Sumitomo Life Insurance’s own notice or letter: it should say what of yours was involved. Keep it.
Expect scams that use your details: calls, texts or emails pretending to be Sumitomo Life Insurance, your bank or the police. Never give codes or passwords, never approve a sign-in you did not start, never move money.

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Questions about the Sumitomo Life Insurance breach

Was Sumitomo Life Insurance hacked?

ITmedia reported a data breach at Sumitomo Life Insurance (Japan) on 10 November 2026. It affected 80,000 users. How it happened, by the sources: through NTT Data. It has been reported but not confirmed by Sumitomo Life Insurance or an authority.

What data was exposed in the Sumitomo Life Insurance breach?

Personal information, by the notices and reports on this page.

How do I know if I was affected?

Organisations normally tell the people whose data was involved, by letter or email, and that notice says what of yours was in it. We cannot look up individual people. If you got a notice, check that it is real, then follow the steps on this page.

Is there a Sumitomo Life Insurance data breach settlement?

No settlement open for claims is on record for Sumitomo Life Insurance as of 15 November 2026. Every open settlement is listed with its deadline.

Is a letter, email or text about the Sumitomo Life Insurance breach real or a scam?

A real notice names the breach, says what data was involved and never asks for a password, a code or a payment. Criminals often send fake notices after a breach is in the news. Do not use links or phone numbers in the message: go to Sumitomo Life Insurance’s own site, or check the letter here.

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From the data breach tracker: official notices, breach databases and the news, every fact with its source. Open data (CC BY 4.0) · How the tracker works · Official registers · Corrections and changes · Accuracy audit · For journalists · Found a mistake? Tell us and we correct it.