Overview
29 members through class 71 plus 1,158 in classes 72–77 = 1,187 (name and email 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
- メール配信システムへの不正アクセスによる個人情報漏洩の可能性についてのお詫びとご報告精進同窓会 · 2026-11-09