Overview
First published date is 2026-06-08 (Kyushu Electric TD press page and parent Kyushu Electric timely disclosure). First notice said up to 10.9M contracts; the July 8 second report’s refined total of 13.54M (10.03M individuals + 3.51M corporate etc.) is stored as the count. Sub-counts are described, not summed. An older first-notice PDF URL returned 404; the live first-notice HTML/PDF and second-report PDF are now sourced.
Timeline
- Occurred
- Discovered
- Disclosed
Organization response
Per the notice, the organisation investigated and contained the incident, notified individuals and offered monitoring or protective resources.
What you can do
Be wary of emails, SMS or calls impersonating the organisation; do not open links or attachments or enter passwords or card details. Change reused passwords on other services.
Sources
- 九州電力送配電株式会社におけるお客さま情報を保存した外部記憶媒体の所在不明事案に係る報告について（第二報）九州電力株式会社 · 2026-11-09
- お客さま情報を保存した外部記憶媒体の所在不明について九州電力送配電株式会社 · 2026-11-09
- 九州電力送配電株式会社におけるお客さま情報を保存した外部記憶媒体の所在不明について（初報・適時開示）九州電力株式会社 · 2026-11-09