Overview
121 people whose nationality was printed (3,000 total mailings described only).
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
- 個人情報（国籍）の漏えいについて（2026年7月29日）杉並区 · 2026-11-09