Privacy Unpacked

Reported breach

Japan Network Security Association data breach

JPJapan · Technology and telecom · 日本ネットワークセキュリティ協会

Security NEXT reported a data breach at Japan Network Security Association (Japan) on 9 November 2026. It affected 15,128 records.

People affected
15,128records
Reported
9 November 2026News report

What was exposed 8

  • Email addresses
  • Names
  • Organization names
  • Locations
  • Employee counts
  • Industry types
  • User counts
  • IDs

How it happened

How
Hacking There is a possibility it was accessed from around 10 PM on October 30th, and we are continuing to investigate details such as the route of intrusion and the scope of impact. source
Our translation from Japanese10月30日夜ごろからアクセスされていた可能性があり、侵入経路や影響範囲などの詳細について調査を進めている。

Sources 1

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

Questions about the Japan Network Security Association breach

Was Japan Network Security Association hacked?

Security NEXT reported a data breach at Japan Network Security Association (Japan) on 9 November 2026. It affected 15,128 records. How it happened, by the sources: hacking. It has been reported but not confirmed by Japan Network Security Association or an authority.

What data was exposed in the Japan Network Security Association breach?

Email addresses, Names, Organization names, Locations, Employee counts, Industry types, User counts and IDs, 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 Network Security Association data breach settlement?

No settlement open for claims is on record for Japan Network Security Association as of 15 November 2026. Every open settlement is listed with its deadline.

Is a letter, email or text about the Japan Network Security Association 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 Network Security Association’s own site, or check the letter here.

What regulators did

  1. Sanction · CNIL (France) · ASSOCIATION
    ASSOCIATION
    Défaut de sécurité des données Site internet · Sanction pécuniaire The decision
  2. Sanction · CNIL (France) · ASSOCIATION
    ASSOCIATION
    Défaut de sécurité des données Site internet · Sanction pécuniaire The decision
  3. Sanction · CNIL (France) · ASSOCIATION (CONSEILS JURIDIQUES)
    ASSOCIATION (CONSEILS JURIDIQUES)
    droit d’opposition des personnes à ce que les données professionnelles soient mises en ligne sur le site de l'association · Non-respect du droit d'opposition des personnes The decision
  4. Sanction · CNIL (France) · ASSOCIATION (ORGANISATION PROFESSIONNELLE)
    ASSOCIATION (ORGANISATION PROFESSIONNELLE)
    droit d’opposition d'une personne à ce que son CV soit retiré du site de l'association · Défaut de formalités préalables , non respect du droit d'opposition des personnes Défaut de réponse aux demandes de la CNIL The decision

Every regulator action after a breach →

More breaches in Japan

  1. Yamada DenkireportedJPJapan · 14 November 2026 Phone numbersNamesAddresses+2 3.5Mcustomers
  2. Kochi CityreportedJPJapan · 14 November 2026 Personal information 1.5Kpeople
  3. Monex SecuritiesreportedJPJapan · 13 November 2026 Driver’s license numbersEmail addresses 1.1Memail addresses
  4. City of OsakareportedJPJapan · 13 November 2026 Email addresses 1Memail addresses
  5. Cybersecurity CloudreportedJPJapan · 13 November 2026 Email addressesNamesOrganization names+1 –not reported

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.