あなぶきハウジンググループData breach / unauthorized access incident
- Occurred on
- February 3, 2026
- Announced on
- May 21, 2026
- Severity
- SCompromise of deep personal data or usable credentials.
- Scale
- 207,773 records
- Main impact
- A ransomware attack caused personal information to leak from our group's file servers; ultimately 207,773 personal data records were confirmed leaked. Notifications to affected parties and reports to relevant authorities have been made.
- Information involved
- Email addressCard & payment dataIdentity verification dataPhone numberHome addressFull nameDate of birthHealth & medical data
- Cause / key point
- Ransomware gained access by exploiting a vulnerability in a group company's network device, and subsequent lateral movement caused files to be exfiltrated.About Ransomware
- Industry
- Real estate
- Listing / capital
- UnlistedListed group company: 穴吹興産(東証スタンダード 8928)
Listed core company of the あなぶき Group
- Last updated
- October 20, 2026
Stock price reaction to the disclosure穴吹興産・グループ上場会社 / 東証スタンダード 8928
Stock information is reference data based on Yahoo Finance and may be delayed. This site does not solicit or advise investment and does not guarantee the accuracy or completeness of this information. We accept no liability for any investment decision based on it.
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Written & reviewed
Reviewed byYutaro SasaoFounder & CEO, MediaLeap Inc.
CEO of MediaLeap Inc. Working on both sides of web advertising and web media since 2013; founded the company in May 2025.
Review scope: cross-checking against primary sources (official and government announcements), verifying claims stay within the facts, and checking source attribution。Last reviewed:
Written by:Leak Watch editorial team (AI-assisted drafts verified against sources by the editorial team) · Reviewer profile · Request a correction
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Attack method classification: Ransomware(Encrypting data and demanding a ransom)
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