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Ryomo Systems Co., Ltd.

listed as ryomo.co.jp · Claimed by Safepay · listed 8 hours ago

Today
Age
since listed · data leaked

Status timeline

  1. ListedSep 15, 2026
  2. Data leakeddate unknown

At a glance

Group
Safepay
Status
Data leaked
Country
Japan
Listed on leak site
Sep 15, 2026

About the victim

AI dossier — public-source company profile

Ryomo Systems Co., Ltd. is a publicly listed Japanese IT systems integrator founded in 1970, headquartered in Kiryu, Gunma Prefecture. The company provides software development, system integration, cloud services, data-center operations, and IT consulting across manufacturing, healthcare, government, and utilities sectors, with operations in Japan, Vietnam, and the Philippines.

Industry
Information Technology Services & Systems Integration
Address
Kiryu, Gunma Prefecture, Japan
Founded
1970

Attack summary

Severity: medium — Breach of a large IT systems integrator with access to critical infrastructure clients (utilities, government, healthcare) represents significant potential exposure, but no proof files or specific data inventory has been published, and operational impact is unconfirmed.

The SafePay group claims to have breached Ryomo Systems. No specific details on encryption, exfiltration method, or data types are provided in the leak post. The threat actor states 'The link will be added soon,' suggesting proof materials were not yet published at the time of disclosure.

medium

What the group claims

Established in January 1970 as a regional computer-services center, the company has developed into a publicly listed systems integrator providing …

The leak post

captured from the group's site
Ryomo Systems Co., Ltd. (株式会社両毛システムズ) is a Japanese information technology company headquartered in Kiryu, Gunma Prefecture.
Established in January 1970 as a regional computer-services center, the company has developed into a publicly listed systems integrator providing software development, information-processing services, system equipment, cloud services, data-center operations and other IT solutions. Its customer base spans manufacturing, mobility, printing, retail, healthcare, education, energy, water utilities and local government.Ryomo Systems provides consulting, system development and implementation, outsourcing, network and security services, cloud platforms, operational support and data-center services. The company operates development centers and support offices across Japan and also has overseas group operations in Vietnam and the Philippines.
The link will be added soon.

Sources

Source

Indexed 8 hours 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 safepay

The Safepay ransomware group is a newly emerged threat actor first observed in November 2024, demonstrating rapid operational scale with 444 documented victims in a short timeframe, indicating financially motivated cybercriminal activity. Due to the group's recent emergence, publicly documented information about their country of origin, affiliations, and operational model remains limited among established threat intelligence sources. Given the recency of their appearance and lack of detailed technical analysis from major security firms, their specific attack methodologies, initial access vectors, and encryption techniques have not been comprehensively documented in public threat intelligence reporting. The group has demonstrated a broad targeting approach across multiple sectors including manufacturing, technology, education, and healthcare, with primary focus on victims in the United States, Germany, Canada, the United Kingdom, and Australia, though no specific high-profile campaigns or notable incidents have been publicly attributed to them by major security vendors or law enforcement agencies. As of the latest available intelligence, Safepay appears to remain active, though comprehensive threat profiling is limited due to the group's recent emergence and the current lack of detailed technical analysis from established cybersecurity research organizations. The group has been linked to 779 public disclosures across our corpus. First observed on a leak site on November 19, 2024; most recent post September 15, 2026. The operation is currently active.

Timeline of this disclosure

  • September 15, 2026ryomo.co.jp listed by safepay on the group's public leak site

Other recent disclosures by safepay

safepay has been linked to 779 public victims on Darkfield. A sample of the most recent:

See the full safepay dossier →

Sector and geography

Geographically, ryomo.co.jp is reported in Japan, a country with 89 ransomware disclosures in our corpus.

If your organisation is affected

A listing by safepay means ryomo.co.jp 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 safepay'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.