Confirmed

Anabuki Housing Service: personal data of 207,773 people leaked after ransomware

After confirming ransomware on February 3, 2026 and issuing a first notice, later investigation confirmed external personal-data leakage; the May 21 sixth report fixed the count at 207,773.

Last updated: 2026-11-09

Overview

Final count 207,773. Names, phones and other fields vary by subject. Cards, bank accounts and My Numbers were reported out of scope in the fourth notice. No secondary harm confirmed.

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. 情報漏えいに関する調査結果および今後の取り組みについて(ランサムウェア攻撃による不正アクセスについて・第6報)株式会社穴吹ハウジングサービス · 2026-11-09
  2. 情報漏えいに関するお知らせとお詫び(ランサムウェア攻撃による不正アクセスについて・第4報)株式会社穴吹ハウジングサービス · 2026-11-09
  3. ランサムウェア被害発生のお知らせ(第1報)株式会社穴吹ハウジングサービス · 2026-11-09

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