Shinchosha: ransomware attack
A June 27 intrusion through a network-device vulnerability led to encryption and theft. December's final report separately categorized confirmed and possible exposures, with possible duplicate individuals. Confirmed leakage in outsourced investigations comprised about 89,000 identifier-only entries, 12,500 identifier/name entries and 1,200 entries containing medical information; other categories included possible exposures. No secondary harm was confirmed.
Disclosed
2025-07-11
Organizations involved
1
Leaked or at risk
89K
89,000
Downtime
Unknown
Timeline
- Detected 2025-06-27
- Disclosed 2025-07-11
- 14 days
Attack or cause
- Method
- [Ransomware]
- Impact
- [Data leak][Service outage]
- Entry point
- Unknown
Data exposed or at risk
Organizations involved
[Breached][Critical]Tokyo, ShinagawaScientific research, professional and technical services89,000 leaked
Shinchosha Inc.
Sources
- [1][Official]不正アクセスに関するご報告とお詫びShinchosha Inc. · 2025-07-11
- [2][Official]不正アクセスに関する最終報告Shinchosha Inc. · 2025-12-05