NTT West Data Breach
On October 17, 2023, Japanese telecommunications provider NTT West (ntt-west.co.jp) disclosed that a former temporary employee at its subsidiary NTT Business Solutions had abused administrator privileges between 2013 and July 2023 to download customer databases onto USB storage devices.
Exposed Data Types
5- Names
- Physical addresses
- Phone numbers
- Dates of birth
- Credit cards
About This Breach
Subject to administrative guidance from Japan's Ministry of Internal Affairs and Communications (MIC), the leak compromised approximately 9,280,000 customer records across 69 client organizations, exposing full names, postal addresses, phone numbers, dates of birth, and a subset of credit card details.
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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