Investigating

Anabuki Kosan: customer, candidate and employee personal data may have leaked after ransomware

Possible data leak: After confirming ransomware on February 3, 2026 and issuing a first notice on February 4, later investigation found some personal data on a leak site.

Last updated: 2026-11-09

Overview

Count still undetermined (count blank). Some real-estate customer, mid-career candidate and officer/employee/ex-employee data. Cards and JOINT Alpha members out of scope.

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. ランサムウェア被害発生のお知らせ穴吹興産株式会社 · 2026-11-09
  2. 情報流出に関するお知らせとお詫び(ランサムウェア被害発生のお知らせ(第4報))穴吹興産株式会社 · 2026-11-09
  3. 情報流出に関するお知らせとお詫び(ランサムウェア被害発生のお知らせ(第3報))穴吹興産株式会社 · 2026-11-09

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