Investigating

Nihon University Sangenjaya: staff mailbox personal data may have been viewed after phishing takeover

On February 9, 2026 one staff mailbox was taken over via phishing and sent 321 suspicious messages; the campus disclosed on March 6 that mailbox personal data may have been viewed.

Last updated: 2026-11-09

Overview

One staff account. Full mailbox contents may have been readable (count blank). No secondary harm confirmed.

Timeline

  1. Occurred
  2. Discovered
  3. 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

  1. 不正アクセスによる迷惑メール発信に関するおわびと御報告日本大学三軒茶屋キャンパス · 2026-11-09

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