In the latest cybersecurity news, Nippon Medical School Musashi Kosugi Hospital — a company operating in the JP — has fallen victim to a ransomware attack conducted by the group netrunner. This data breach, discovered on 2026-04-03 20:21:00.202049, underscores the increasing need for proactive cybersecurity defenses as we continue through 2025.
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Incident Report
| Attribute | Information |
|---|---|
| Target Organization | Nippon Medical School Musashi Kosugi Hospital |
| Threat Group | netrunner |
| Summary | Nippon Medical School Musashi Kosugi Hospital is a 372-bed regional teaching hospital in Nakahara-ku, Kawasaki (Musashi-Kosugi area), affiliated with Nippon Medical School. Established in 1937, it offers comprehensive services across 36 clinical departments, including emergency and critical care, ICU, NICU, perinatal and pediatric care, cancer treatment, and minimally invasive endovascular procedures. The hospital serves as a regional hub with disaster-resistant facilities and an on-site heliport, and emphasizes advanced, patient-centered care and medical education. |
| Date of Breach | 2026-04-03 20:20:47.031008 |
| Discovery Date | 2026-04-03 20:21:00.202049 |
| Region | JP |
| Target Domain | www.nms.ac.jp/kosugi-h |
| Business Sector | Healthcare |
Don’t wait for a breach to take action — stay informed and take control of your cybersecurity posture today.
You can also check if your organization’s data has been exposed using our free Data Breach Checker.
Disclaimer: HookPhish does not engage in the exfiltration, downloading, taking, hosting, viewing, reposting, or disclosure of any stolen information. All breach data reported here is sourced from publicly available threat intelligence feeds for awareness purposes only.

