All Breaches
May 26, 2026 Verified Sensitive Record Energy

Kyushu Electric TD 2026 Data Breach

The Kyushu Electric TD 2026 data breach concerns an external SSD carrying customer-information backups that was found missing from its storage location on May 26, 2026.

10 Million
Reported Records
7
Data Types
Critical
Severity
Yes
Verification

Exposed Data Types

7
Customer names
Service location addresses
Electricity usage data
Retail electricity provider names
Supply point identification numbers
Phone numbers (selected records)
Contract and application information

Additional Information

Added DateJuly 27, 2026
Breach DateMay 26, 2026
Domainkyuden.co.jp
SourceOfficial notices from affected institutions
Last Content UpdateJuly 29, 2026

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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Company Information

Company NameKyushu Electric Power Transmission and Distribution Co., Inc.
SectorEnergy
CountryJapan
Websitewww.kyuden.co.jp

Risk Level

Critical

The reported impact exceeds 1 million and falls within the critical severity band.

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