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REXT Holdings Co., Ltd.

Claimed by Ransomhouse · listed 4 days ago

3d
Age
since listed · data leaked

Status timeline

  1. ListedSep 1, 2026
  2. Data leakeddate unknown

At a glance

Group
Ransomhouse
Status
Data leaked
Country
Japan
Listed on leak site
Sep 1, 2026

About the victim

AI dossier — public-source company profile

REXT Holdings Co., Ltd. is a diversified entertainment and retail holding company based in Tokyo, Japan. The group operates multiple subsidiaries including entertainment specialty shops selling games, music, DVDs and books; a used entertainment goods resale chain; a casual apparel retailer focused on jeans; and an employment support business. They provide daily entertainment through various media channels and retail operations.

Industry
Entertainment & Retail (Media, Music, Games, Books, Used Goods, Apparel)
Address
Tokyo, Japan

Attack summary

Severity: medium — Confirmed unauthorized system access by a named ransomware group with data_published status and public company incident disclosures; however, the leak post itself is minimal and contains no specific data inventory, proof count, or explicit ransom demand. The fact that REXT issued multiple incident reports suggests operational/reputational impact, but the severity cannot be upgraded to 'high' without evidence of specific sensitive data categories (PII at scale, financial records, etc.).

The ransomhouse group claims to have conducted an unauthorized system access attack against REXT Holdings. The public company disclosures (third and second reports issued August 2024) confirm a security incident, though the leak post provides minimal detail on the scope of data exfiltrated or encryption.

medium

Data the group says was taken

AI dossier — extracted from the leak post
  • Company systems
  • Customer or business records (type unspecified in post)

What the group claims

Private retail and holding company based in Tokyo, Japan.

Sources

Source

Indexed 4 days 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 Ransomhouse

Ransomhouse is a ransomware group that emerged in June 2021, operating primarily for financial gain through extortion campaigns targeting organizations across multiple sectors globally. The group's origin and specific affiliations remain unclear based on publicly available intelligence, though their operational patterns suggest they function as an independent cybercriminal organization rather than a traditional ransomware-as-a-service model. Ransomhouse employs double extortion tactics, stealing sensitive data before deploying their ransomware payload and threatening to publish the information on their leak site if victims refuse to pay the demanded ransom. The group has demonstrated a broad targeting approach, with documented attacks against 187 victims primarily concentrated in the United States, China, United Kingdom, Italy, and Spain, focusing heavily on healthcare, technology, business services, and manufacturing sectors. While specific high-profile campaigns have not been extensively documented by major security firms, the group's consistent victim count and geographic distribution indicate sustained operational capability since their emergence. As of current reporting, Ransomhouse remains active with no known major law enforcement disruptions or confirmed rebranding efforts. The group has been linked to 220 public disclosures across our corpus. First observed on a leak site on June 1, 2021; most recent post September 1, 2026. The operation is currently active.

Also tracked as: RANSOM HOUSE.

Timeline of this disclosure

  • September 1, 2026REXT Holdings Co., Ltd. listed by Ransomhouseon the group's public leak site

Other recent disclosures by Ransomhouse

Ransomhouse has been linked to 220 public victims on Darkfield. A sample of the most recent:

See the full Ransomhouse dossier →

Sector and geography

Geographically, REXT Holdings Co., Ltd. is reported in Japan, a country with 89 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Ransomhouse means REXT Holdings Co., Ltd. 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.
  • Report the incident to your national CERT, JPCERT/CC (Japan), as required for your jurisdiction.
  • Monitor for the data appearing on Ransomhouse'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.