Record / data breach · Japan · 2026-10-20
Reported data breach at an organization in Japan
data breachconfidence 80anonymizedauto · unreviewed
Hackers stole 1.8 million records from Nikkei containing names, addresses, email addresses, phone numbers, and dates of birth.
Sources
- Primary source on file. It names the organization, so it is not linked while this entry is anonymized.
- Upstream: Security news (RSS + Claude). The upstream record names the organization, so it is not linked here.
- Candidate incidents extracted from public security reporting; every entry links its article
Defenses for this class of incident
all categoriesA data breach sits in these classes of the AI-security landscape. The companies below work on that class of problem. This is a taxonomy, not a claim that any of them would have changed this incident.
Vendor data: AI Security Startups Map by Prompt Security (CC BY 4.0), synced daily. startups.prompt.security. Paid placements are labelled Sponsored; HeimWall, which runs this site, is labelled Operator. 460 companies in the directory.
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Wrong or missing? Email founders@heimwall.ai. Corrections are logged here, in place. How corrections and takedowns work.