Investigating

Izumo City: Arcadia intrusion may have exposed Izumo disaster-mail registered emails

Disclosed around Oct 14, 2026 (intrusion confirmed Oct 13). Arcadia-operated Izumo disaster mail may have exposed registered emails. No headcount.

Last updated: 2026-11-09

Overview

No published headcount → blank.

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. いずも防災メールの不正アクセスに伴う注意喚起について出雲市 · 2026-11-09

Related information

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