Reported breach

Japan Chamber of Commerce and Industry data breach

JPJapan · Industry, energy and transport · 日本商工会議所

Security NEXT reported a data breach at Japan Chamber of Commerce and Industry (Japan) on 12 November 2026. It affected 980,000 exam takers.

What we know as of 13 November 2026

Status: Reported by Security NEXT; not yet confirmed by Japan Chamber of Commerce and Industry or an authority.
People affected: 980,000 exam takers.
What was exposed: Email addresses, Phone numbers, Dates of birth, Names, Addresses, Sex, Exam results and Exam scores.
When: First reported 12 November 2026.
Japan Chamber of Commerce and Industry’s record: No earlier breach on record under this name; 2 regulator actions on file.

Not known yet: when it began, how it happened and who was behind it. This page is updated as notices and statements come in.

Every fact above has its source below. Journalists: free to quote with credit (“Privacy Unpacked data breach tracker”, with a link to this page and the date); the figures can move. Follow this breach (feed) · Every major breach · Ask us for a figure

People affected: 980,000exam takers
Reported: 12 November 2026News report

What was exposed 8

Email addresses
Phone numbers
Dates of birth
Names
Addresses
Sex
Exam results
Exam scores

Sources 1

News reportSecurity NEXTTest management system compromised, possibility of test-taker information leakage - JCCI (our translation from Japanese)12 November 2026 · 980,000 exam takers

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 Japan Chamber of Commerce and Industry had your data

Look for Japan Chamber of Commerce and Industry’s own notice or letter: it should say what of yours was involved. Keep it.
Your email address is out: expect convincing phishing. Open Japan Chamber of Commerce and Industry 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.
Your home address is out: be wary of letters, parcels or visitors that mention Japan Chamber of Commerce and Industry, and of texts asking for a “delivery fee”.
Expect scams that use your details: calls, texts or emails pretending to be Japan Chamber of Commerce and Industry, 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 Japan Chamber of Commerce and Industry breach

Was Japan Chamber of Commerce and Industry hacked?

Security NEXT reported a data breach at Japan Chamber of Commerce and Industry (Japan) on 12 November 2026. It affected 980,000 exam takers. The sources do not say how it happened. It has been reported but not confirmed by Japan Chamber of Commerce and Industry or an authority.

What data was exposed in the Japan Chamber of Commerce and Industry breach?

Email addresses, Phone numbers, Dates of birth, Names, Addresses, Sex, Exam results and Exam scores, 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 Japan Chamber of Commerce and Industry data breach settlement?

No settlement open for claims is on record for Japan Chamber of Commerce and Industry as of 15 November 2026. Every open settlement is listed with its deadline.

Is a letter, email or text about the Japan Chamber of Commerce and Industry 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 Japan Chamber of Commerce and Industry’s own site, or check the letter here.

What regulators did

20 September 2016 Sanction · CNIL (France) · COMMERCE
COMMERCE
Faille de sécurité · Défaut de sécurité et de confidentialité des données ; manquement à l’obligation de définir une durée de conservation The decision
7 July 2016 Sanction · CNIL (France) · COMMERCE
COMMERCE
Prévention de la fraude à la carte bancaire · Non-respect des formalités préalables ; défaut de sécurité et de confidentialité des données ; manquement à l’obligation de définir une durée de conservation The decision

Every regulator action after a breach →

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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.