Investigating

Ayase City: Arcadia intrusion may have exposed data on 11,053 safety-mail registrants

First notice Oct 13, 2026. Arcadia-operated Ayase safety/security mail may have leaked personal data; 11,053 registered users. Service suspended.

Last updated: 2026-11-09

Overview

11,053 people.

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. あやせ安全・安心メールの状況について綾瀬市 · 2026-11-09

Related information

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