Ichinomiya CityArcadia mail delivery / Net119

2LowPossibleAnnounced Updated

After unauthorized access to Arcadia, registration data of four services may have leaked. Counts for each service are separate. Some new registrations were suspended.

This incident was imported from a dataset that compiles public announcements, and we are still checking it against the sources. Counts and causes will be updated after the check. Sources are in Japanese.

Cause
Via a vendor or service
Sector
Public sector
Operational impact
Some services stopped

Data involved

DataStatusCountGroupEvidence
Email addressPossible leakNot disclosed—Source(opens in a new tab)
NamePossible leakNot disclosed—Source(opens in a new tab)
Phone numberPossible leakNot disclosed—Source(opens in a new tab)
Postal addressPossible leakNot disclosed—Source(opens in a new tab)

Counts are the figures the organization announced. Because the same person may be counted more than once, we do not add the rows together.

What users should do

  • Watch for emails and texts pretending to be the company

General steps based on the type of data involved. Check the organization’s notice or help line to see whether you are affected.

Sources

  1. 2026年10月19日定例市長記者会見 委託先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への対応についてwww.city.ichinomiya.aichi.jp · Published 2026-10-19(opens in a new tab)
  2. 委託サービスの概要(別紙1)www.city.ichinomiya.aichi.jp · Published 2026-10-19(opens in a new tab)
  3. 経緯(別紙2)www.city.ichinomiya.aichi.jp · Published 2026-10-19(opens in a new tab)