Ongoing List of Major Companies Publicly Reporting Personal Data Leaks

Asahi Shimbun has compiled an ongoing list of major companies, organizations, and services that have publicly disclosed risks of personal data leakage since September 2026, citing unauthorized access targeting businesses and other causes. The article is updated as disclosures are made by each company and provides a list along with related explanations.

The article text also includes pointers to additional content and photos for paid subscribers (for example, photos showing service or company logos), and some information is limited to subscribers. Writing and updates are carried out as needed, and the most recent update date is clearly indicated in the article (updated October 21, 2026).

As background, personal data leaks caused by unauthorized access targeting companies have occurred across multiple industries, and the nature and scale of the damage vary by company. This article does not attempt to cover the full scope of damages; rather, it compiles information based on each company's public disclosures. Readers should check each company's disclosures and follow-up reports for details on specific damage, scope of impact, and guidance on countermeasures. Because the article is updated as new information becomes available, it is recommended to verify the latest information directly on the source page.