Uchiyama Holdings: ransomware attack
Anomalies detected March 7 were disclosed March 9. The April 20 report confirmed removal of intruders and restoration of normal systems. Some employee information may have leaked and staff were notified; customer or business-partner leakage was not confirmed. Data identification and monitoring continued, without a published count. Customer services continued without interruption.
Disclosed
2026-03-09
Organizations involved
1
Leaked or at risk
Unknown
Downtime
Unknown
Timeline
- Detected 2026-03-07
- Disclosed 2026-03-09
- 2 days
Attack or cause
- Method
- [Ransomware]
- Impact
- [Data leak]
- Entry point
- Unknown
Data exposed or at risk
Organizations involved
[Breached][Major]Fukuoka, Kitakyushu, KokurakitaMedical care and welfare
Uchiyama Holdings Co., Ltd.
Sources
- [1][Official]サイバーセキュリティインシデントに関するお知らせUchiyama Holdings Co., Ltd. · 2026-03-09
- [2][Official]サイバーセキュリティインシデントに関するお知らせ【第3報】Uchiyama Holdings Co., Ltd. · 2026-04-20