Investigating

Otaru City: Arcadia intrusion may have exposed registration-mail, staff-assembly and NET119 registrant data

Disclosed Oct 14, 2026. Possible exposure of 720 registration-mail, 940 staff-assembly and 37 NET119 records. Subsets not summed. Services restored.

Last updated: 2026-11-09

Overview

Subsets not summed → 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. 情報配信サービス運営事業者への不正アクセスによる個人情報漏洩の可能性について小樽市 · 2026-11-09

Related information

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