Overview
No confirmed/published headcount → blank.
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
- ランサムウェア攻撃によるシステム障害に関するお知らせとお詫び京王電鉄株式会社 · 2026-11-09