Investigating

Karatsu City: Arcadia intrusion may have exposed information-mail registrant data

Possible data leak: Disclosed Oct 13, 2026 (restart page updated Oct 19). After Arcadia information-mail vendor intrusion, new sign-ups paused then resumed Oct 19 17:00. Notice warns registrants about suspicious mail following the leak risk. 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. 【利用者の新規受付再開】唐津市情報メール配信サービスへの不正アクセスについて唐津市 · 2026-11-09

Related information

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