Reported breach

United Supermarket Holdings (USMH) data breach

JPJapan · Retail and e-commerce · ユナイテッド・スーパーマーケット・ホールディングス

Nikkei Business Daily reported a data breach at United Supermarket Holdings (USMH) (Japan) on 12 November 2026. It affected 64,003 accounts.

People affected: 64,003accounts
Reported: 12 November 2026News report

What was exposed 2

Email addresses
Names

How it happened

How: Hacking On October 14th, unauthorized access from a third party was confirmed. source
Our translation from Japanese
第三者から不正アクセスがあったことを10月14日に確認した
Through: Scan&Go ignica レジに並ばずに買い物ができる機能などをもつアプリ「Scan&Go ignica」（スキャンアンドゴーイグニカ）のシステムに、第三者から不正アクセスがあった source
Way in: Scan&Go ignica There was unauthorized access from a third party to the system of the app "Scan&Go ignica" which has functions such as shopping without waiting in line at a register. source
Our translation from Japanese
レジに並ばずに買い物ができる機能などをもつアプリ「Scan&Go ignica」（スキャンアンドゴーイグニカ）のシステムに、第三者から不正アクセスがあった

Sources 1

News reportNikkei Business DailyUSMH, which operates Maruetsu and others, approximately 60,000 pieces of personal information leaked due to unauthorized access (our translation from Japanese)12 November 2026 · 64,003 accounts

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 United Supermarket Holdings (USMH) had your data

Look for United Supermarket Holdings (USMH)’s own notice or letter: it should say what of yours was involved. Keep it.
Your email address is out: expect convincing phishing. Open United Supermarket Holdings (USMH) by typing its address yourself, never through a link in an email or text, and check the sender before you reply.
Expect scams that use your details: calls, texts or emails pretending to be United Supermarket Holdings (USMH), 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 United Supermarket Holdings (USMH) breach

Was United Supermarket Holdings (USMH) hacked?

Nikkei Business Daily reported a data breach at United Supermarket Holdings (USMH) (Japan) on 12 November 2026. It affected 64,003 accounts. How it happened, by the sources: hacking, through Scan&Go ignica. It has been reported but not confirmed by United Supermarket Holdings (USMH) or an authority.

What data was exposed in the United Supermarket Holdings (USMH) breach?

Email addresses and Names, 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 United Supermarket Holdings (USMH) data breach settlement?

No settlement open for claims is on record for United Supermarket Holdings (USMH) as of 15 November 2026. Every open settlement is listed with its deadline.

Is a letter, email or text about the United Supermarket Holdings (USMH) 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 United Supermarket Holdings (USMH)’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.