Reported breach

Nishi-Nippon Financial Holdings data breach

JPJapan · Banks and finance · 西日本フィナンシャルホールディングス

FNN Prime Online reported a data breach at Nishi-Nippon Financial Holdings (Japan) on 6 November 2026. It affected 188 records.

People affected: 188records
Reported: 6 November 2026News report

What was exposed 5

Email addresses
Phone numbers
Names
Company names
Department

How it happened

How: Hacking Studio Co., Ltd. was subjected to unauthorized access source
Our translation from Japanese
Studio株式会社が不正アクセスを受けた
Through: Studio株式会社 Studio Co., Ltd., which operates the external service "Studio", was subjected to unauthorized access source
Our translation from Japanese
外部サービス「Studio」を運営するStudio株式会社が不正アクセスを受けた
Way in: Studio Studio Co., Ltd., which operates the external service "Studio" used for web design of business contests, was subjected to unauthorized access source
Our translation from Japanese
ビジネスコンテストのWebサイト制作に利用していた外部サービス「Studio」を運営するStudio株式会社が不正アクセスを受けた

Sources 1

News reportFNN Prime OnlinePersonal information of a web design service used was subject to unauthorized access... (our translation from Japanese)6 November 2026 · 188 records

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 Nishi-Nippon Financial Holdings had your data

Look for Nishi-Nippon Financial Holdings’s own notice or letter: it should say what of yours was involved. Keep it.
Your email address is out: expect convincing phishing. Open Nishi-Nippon Financial Holdings by typing its address yourself, never through a link in an email or text, and check the sender before you reply.
Your phone number is out: ask your mobile operator for a PIN or port-out lock, so nobody can move your number to another SIM card and take your login codes.
Expect scams that use your details: calls, texts or emails pretending to be Nishi-Nippon Financial Holdings, your bank or the police. Never give codes or passwords, never approve a sign-in you did not start, never move money.

Use Nishi-Nippon Financial Holdings? Hear first next time

Breach Radar tells you when a company you use is breached, and what to do. Free, and your list stays on your phone.

Download on the App Store

Questions about the Nishi-Nippon Financial Holdings breach

Was Nishi-Nippon Financial Holdings hacked?

FNN Prime Online reported a data breach at Nishi-Nippon Financial Holdings (Japan) on 6 November 2026. It affected 188 records. How it happened, by the sources: hacking, through Studio株式会社. It has been reported but not confirmed by Nishi-Nippon Financial Holdings or an authority.

What data was exposed in the Nishi-Nippon Financial Holdings breach?

Email addresses, Phone numbers, Names, Company names and Department, 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 Nishi-Nippon Financial Holdings data breach settlement?

No settlement open for claims is on record for Nishi-Nippon Financial Holdings as of 15 November 2026. Every open settlement is listed with its deadline.

Is a letter, email or text about the Nishi-Nippon Financial Holdings 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 Nishi-Nippon Financial Holdings’s own site, or check the letter here.

More breaches in Japan

Every breach in Japan →

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.