Investigating

Nagoya City: Arcadia intrusion may have exposed data on 557 Net119 registrants

Press release Oct 14, 2026 18:00 (page updated Oct 15). Arcadia-provided Net119 intrusion may have exposed data on 557 registrants (as of Oct 14).

Last updated: 2026-11-09

Overview

557 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. 不正アクセスによる個人情報が漏えいした可能性のある事案について名古屋市 · 2026-11-09

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