Overview
The PC held patrol/instructor/neighbourhood-chair rosters (notice says “about 1,700”, so count blank) with names, addresses, birth dates, phones and some emails, plus about 100 images. Exact counts still being determined.
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
- 四街道市防犯協会が使用するパソコンにおける不正操作事案について四街道市 · 2026-11-09
- 個人情報漏えいの可能性がある事案の発生について四街道市 · 2026-11-09