Was Anabuki Kosan hit by ransomware?

Anabuki Kosan was listed by the Qilin ransomware operation (Japan), and stolen data was published on the group's leak site. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the Qilin ransomware group?

Qilin is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

What data was leaked in the Anabuki Kosan breach?

Qilin published data attributed to Anabuki Kosan. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Anabuki Kosan Inc.

listed as Anabuki Kosan · Claimed by Qilin · listed 4 months ago

Age

since listed · data leaked

Status timeline

ListedFeb 10, 2026
Data leakeddate unknown

At a glance

Group: Qilin
Status: Data leaked
Country: Japan
Listed on leak site: Feb 10, 2026

About the victim

AI dossier — public-source company profile

Anabuki Kosan Inc. (あなぶき興産) is a Japanese real estate conglomerate headquartered in Japan, operating across condominium development and sales, real estate solutions, investment real estate, senior housing, renewable energy development, M&A/business revitalization, and overseas business. The company operates a broad group of subsidiaries spanning human resources services, facility operations, nursing/medical care, energy, and tourism. It is a publicly listed company with active IR disclosures and a mid-term management plan through fiscal year 2028.

Industry: Real Estate Development & Property Investment

Attack summary

Severity: critical — The company itself confirmed information leakage (情報流出) via multiple official notices on its website (4th report as of April 2026), indicating exfiltration of data at scale from a diversified real estate group handling PII of condominium purchasers, investors, senior housing residents, and employees. Data_published status confirms the data has been released publicly.

The Qilin ransomware group has listed Anabuki Kosan with a 'data_published' status, indicating that exfiltrated data has been released. The company's own public website confirms a ransomware incident with multiple official notices published between February and April 2026, including an information-leak disclosure.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Corporate business data
Real estate transaction records
Investor/shareholder information
Personal information (confirmed leaked per company notice)
Internal group company data

What the group claims

N/A

The leak post

captured from the group's site

Qilin blog Sorting Created At Name Bluize Software Company url Zoom Info May 13, 2026 0 photos Learn More Mayer Law Firms & Legal Services Company url Zoom Info May 13, 2026 0 photos Learn More Spirit Medical Transport Ambulance Services Company url Zoom Info May 13, 2026 0 photos Learn More Domaine Des Tournels Manufacturing Company url May 13, 2026 0 photos Learn More Johnson Carter Architects Architecture, Engineering & Design Company url Zoom Info May 13, 2026 0 photos Learn More LTJ Industrial Services Industrial Machinery & Equipment Company url Zoom Info May 13, 2026 0 photos Learn More Brand X Hydrovac Services Civil Engineering Construction Company url Zoom Info May 13, 2026 0 photos Learn More John G Yphantides A Professional Law Law Firms & Legal Services Company url Zoom Info May 13, 2026 0 photos Learn More One Legal Law Firms & Legal Services Company url Zoom Info May 13, 2026 0 photos Learn More The Gravity Group Architecture, Engineering & Design Company url Zoom Info May 12, 2026 3 photos Learn More Mediapost Spain Advertising & Marketing Company url Zoom Info May 12, 2026 13 photos Learn More + 6 more AppDirect Software Company url Zoom Info May 11, 2026 0 photos …

Sources

Source

Indexed 4 months ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.

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Disclosure context

About Qilin

Qilin is a ransomware group that emerged in October 2022, operating with primarily financial motivations through targeted attacks against organizations across multiple sectors. The group appears to operate independently with limited public information available regarding their specific country of origin or affiliations to other ransomware families. Qilin employs double extortion tactics, typically exfiltrating sensitive data before deploying their encryption payload, though specific details about their initial access vectors and technical tools remain less documented in public security research. The group has demonstrated a broad targeting approach, with their 1645 known victims spanning multiple countries including the United States, France, Canada, United Kingdom, and Germany, with particular focus on manufacturing, technology, healthcare, and business services sectors. Based on available intelligence reporting, Qilin remains an active threat as of recent assessments, continuing their ransomware operations without significant reported law enforcement disruption. The group has been linked to 1,935 public disclosures across our corpus. First observed on a leak site on October 8, 2022; most recent post June 12, 2026. The operation is currently active.

Timeline of this disclosure

February 10, 2026Anabuki Kosan listed by Qilinon the group's public leak site

Other recent disclosures by Qilin

Qilin has been linked to 1,935 public victims on Darkfield. A sample of the most recent:

See the full Qilin dossier →

Sector and geography

Geographically, Anabuki Kosan is reported in Japan, a country with 108 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Qilin means Anabuki Kosan appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
Monitor for the data appearing on Qilin's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.