Shinryo Corporation says unauthorized access caused a system outage on October 17, affecting some services. As of October 21, it had not confirmed external leakage of personal or customer data and was still investigating.
Toho Holdings said attackers accessed an Entouch database used for remote detailing and leaked information including healthcare workers’ names, contact details, and appointment data. The number affected is still under investigation.
Maruki Medical Equipment said suspicious access on Oct. 15, 2026, disabled its core ordering and inventory system, halting normal orders and shipments. It is investigating and accepting orders by fax; recovery timing is unknown.
A ransomware attack on Osaka Metropolitan University’s virtualization infrastructure took nearly 500 servers offline and encrypted many backups. Systems across five campuses are affected; personal data may be involved, and classes are suspended through October 9.
SK Logi said unauthorized access to internal systems began around 2 a.m. on September 20, 2026. Its order system was unavailable, and shipping and inventory operations were affected. Data exposure and recovery timing remain under investigation.
CEC says its investigation into the August 5 ransomware attack at its Tokyo Second Data Center found no data leakage. The affected area was isolated and rebuilt, and services have resumed in a secure environment.
T&K TOKA confirmed ransomware damage to some systems on August 28, 2026, and suspended some operations. It is restoring systems and investigating the cause and impact; the attacker, entry point and any data theft remain unknown.
Ambition DX confirmed a leak of some information assets after unauthorized access to a file server. The company has not confirmed Settra’s claim that it stole 437 GB from am-bition[.]jp or identified affected individuals and records.
Nippon Swagelok FST says a March ransomware attack may have exposed personal information belonging to employees, former employees, and business contacts. The company has not disclosed the number affected; no secondary misuse was known as of August 26.
Gig Works says investigators found no evidence that personal data files were removed, but cannot rule out brief viewing of records in a dependent-deduction database. It is notifying potentially affected people and has strengthened security.
Marutaka Kogyo says attackers entered via VPN, created an unauthorized administrator account, encrypted server data and deleted some logs. Forensics found at least 1.5 GB may have leaked; actual exfiltration remains unconfirmed.
OCS said an external cyberattack on servers supporting its OCS FAMILY LINK SERVICE may have exposed personal information and other data. The company shut down the service and related networks while investigating.
Koyasan University said ransomware affected its administrative Active Directory server and part of an administrative staff file server. No data leak has been confirmed; student and teaching systems remain unaffected.
Kaneko Agricultural Machinery says attackers accessed some servers and business data. The servers were shut down and external network access blocked; whether information was exfiltrated remains under investigation.
Five Foxes says it found a possible ransomware infection on some headquarters servers on July 8 and shut them down. The scope, including possible customer-data exposure, remains under investigation; stores and the separate online store remain open.
A July 13 unauthorized-access incident disrupted Nichirei’s warehouse and food-shipping systems, causing confirmed delivery delays and shortages at multiple retailers, restaurants and food companies. Recovery timing remained unknown; data leakage was not confirmed.
Hachioji Gakuen said some servers suffered unauthorized access and ransomware damage. It is investigating with police and outside experts; data exposure and the full impact remain unknown, and its main email address is unavailable.
Network Japan says attackers accessed and deleted its customer database, then demanded cryptocurrency. The company has not confirmed data leaks but cannot rule them out; affected records may include customers’ contact and moving details.
Meitetsu Kyosho says an external investigation found traces of ransomware-related unauthorized access on June 19. Multiple services were disrupted; as of July 2, the company had not confirmed an external data leak and was still investigating.
Faith Group reported a system malfunction possibly linked to ransomware after unauthorized external access. It is investigating the cause and potential information impact, restoring operations, and warning of impersonation phishing.
Daikyo Nishikawa says unauthorized access at its Indonesian subsidiary was detected on March 26, and on June 17 it confirmed some stored data had been sent externally. Production and customer deliveries were not disrupted; an investigation continues.
REXT Holdings says attackers accessed subsidiary D&M’s file-sharing server via a VPN and infected it with ransomware. About 633 FAX-order records may have been exposed; payment data was not confirmed affected. Operations resumed on June 1.
Kintetsu World Express says systems affected by unauthorized access at its Singapore subsidiary have been safely reopened and impacted operations restored. No impact outside Singapore or to core systems has been confirmed.
CKC Network and Gakusan say ransomware hit their shared inquiry-management system. They have not confirmed data loss or external transfer, but cannot rule out exposure of students’ personal information and are investigating.
