Overview
No fixed PII headcount → blank (17,668 is spam volume).
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
- 不正アクセスによる迷惑メール送信に関するお詫びと報告立教大学 · 2026-11-09