Investigating

Yawatahama City: Arcadia intrusion may have exposed fire-corps contact-mail registrant data

Possible data leak: Disclosed Oct 14, 2026. Arcadia intrusion targets fire-corps contact-mail registrants; disaster mail and staff-assembly noted separately. 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. 八幡浜市防災メール等委託事業者への不正アクセスによる個人情報漏えいの可能性について八幡浜市 · 2026-11-09

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