JIHS: iCROWN Repository Portal suspended after unauthorized access on 16 October
The infectious disease research portal was suspended at 16:00 on 16 October after an intrusion. Data impact is under investigation and no reopening date has been set.
Disclosed
2026-10-23
Organizations involved
1
Leaked or at risk
Unknown
Downtime
Unknown
What happened
JIHS detected third-party access to the portal of its infectious disease clinical research network project, commissioned by the health ministry, on 16 October. It stopped operation at 16:00 that day and disclosed the incident on 23 October. [1]
The portal remained stopped at the 23 October notice and no reopening date was set. Data impact was under investigation; no leak or affected-person count was stated. A patient-data leak has not been reported. [1]
Timeline
- Detected 2026-10-16
- Disclosed 2026-10-23
- 7 days
Attack or cause
- Method
- [Intrusion]
- Impact
- [Service outage]
- Entry point
- Unknown
Data exposed or at risk
–
Services hit
Organizations involved
[Breached][Critical]Tokyo, ShinjukuScientific research, professional and technical services
Japan Institute for Health Security
Sources
- [1][Official]感染症臨床研究ネットワーク（iCROWN）リポジトリポータルへの不正アクセスに関するお詫びとお知らせJapan Institute for Health Security · 2026-10-23