Over 1億6500万人分 of Personal Data Potentially Exposed in 2026, Security Firm Says

According to NHK, an aggregation by security company Macnica indicates that the number of personal information records that may have been leaked through unauthorized access in 2026 amounts to over 1億6500万人分. While the specific affected companies and breakdowns of the leaks are addressed in the article, the emphasis here is on the overall scale of the problem.

This aggregation was compiled in light of a series of unauthorized access incidents across multiple companies, and the large scale of the damage is being viewed as a major concern. The report links to related Q&A and guidance articles, providing explanations of the background and suggested responses.

For users, the related coverage includes sections on "what we can do" and "why these incidents are occurring," which point to basic measures to prevent further harm—such as password management and checking service notifications—as important steps. However, this article itself mainly focuses on reporting the aggregated scale of the incidents; detailed coverage of individual companies' responses and technical intrusion methods is handled in separate articles.

Going forward, companies are expected to review their information management systems and strengthen detection and defense against external unauthorized access. Users are advised to monitor official notifications and news reports closely and to watch for suspicious communications or changes in transaction histories.