Confirmed breach

Sony Bank data breach

JPJapan · Banks and finance · ソニー銀行

Nikkei Business Daily and Cryptopolitan reported a data breach at Sony Bank (Japan) on 4 November 2026, and it has been confirmed. It affected 621 customers.

People affected: 621customers
Reported: 4 November 2026News report and 1 more

What was exposed 4

Financial account and card details
Dates of birth
Names
Addresses

How it happened

How: Hacking unauthorized access to the commissioned system for digital securities source
Our translation from Japanese
デジタル証券の委託先システムの不正アクセス
Way in: Securitize The Japan subsidiary of US Securitize, which provides a digital securities platform, suffered unauthorized access on October 29 source
Our translation from Japanese
デジタル証券プラットフォームを提供する米セキュリタイズの日本法人が10月29日に不正アクセスを受けた

Sources 2

News reportNikkei Business DailySony Bank: 621 cases of personal information leakage due to unauthorized access, some including account numbers (our translation from Japanese)4 November 2026 · 621 customers
Confirmed by Sony Bank: Sony Bank announced by the 2nd that personal information for 621 customers was leaked due to unauthorized access to the commissioned system for digital securities.
Our translation from Japanese
ソニー銀行は2日までにデジタル証券の委託先システムの不正アクセスで、顧客621件の個人情報が流出したと発表した。
News reportCryptopolitanData leak at Securitize Japan affected Sony Bank and NTT Data customers (our translation from Russian)4 November 2026 · 621 users

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 Sony Bank had your data

Look for Sony Bank’s own notice or letter: it should say what of yours was involved. Keep it.
Call your bank on the number printed on your card (never one from a message), check recent payments and ask for a new card.
Your home address is out: be wary of letters, parcels or visitors that mention Sony Bank, and of texts asking for a “delivery fee”.
Expect scams that use your details: calls, texts or emails pretending to be Sony Bank, 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 Sony Bank breach

Was Sony Bank hacked?

Nikkei Business Daily and Cryptopolitan reported a data breach at Sony Bank (Japan) on 4 November 2026, and it has been confirmed. It affected 621 customers. How it happened, by the sources: hacking, through Securitize.

What data was exposed in the Sony Bank breach?

Financial account and card details, Dates of birth, Names and Addresses, 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 Sony Bank data breach settlement?

No settlement open for claims is on record for Sony Bank as of 15 November 2026. Every open settlement is listed with its deadline.

Is a letter, email or text about the Sony Bank 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 Sony Bank’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.