Nikkei (Nihon Keizai Shimbun) Data Breach
Japanese financial newspaper publisher and media group Nikkei Inc. (Nihon Keizai Shimbun) announced on October 14, 2026, that an external cloud service used for system development experienced unauthorized access on October 7, 2026.
Exposed Data Types
8- Email addresses
- Names
- Phone numbers
- Physical addresses
- Employers
- Job titles
- Dates of birth
- Genders
About This Breach
The affected cloud environment held approximately 1,830,000 records in total.
According to Nikkei's disclosure, roughly 1,680,000 of those records consisted of non-identifying system data, while approximately 150,000 records contained personal information, such as full names, company and department names, postal addresses, telephone numbers, dates of birth, and gender, including around 120,000 email addresses. Payment card details and core digital subscription credentials were not affected.
Verification and editorial method
LeakData compares the incident name, date, affected-record count, and exposed data types with accessible sources. Unverified fields are not presented as facts, and records are updated when new evidence becomes available.
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