Overview
“About 500 people” → 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
- 【お詫び】西武 旅するレストラン「52席の至福」における予約関連情報の一部漏えいについて西武鉄道株式会社 · 2026-11-09