SHINDO4
Kansai Medical University Hospital
Patients~1,800people
POSSIBLE LEAKHealth / medical / treatment / Full nameLoss · Closed (final report)
Open in the live monitor ▶- Disclosed
- Jun 3, 2026
- Leak
- Leak possible
- Type
- Loss
- Status
- Closed (final report)
- Security spend
- Not checked yet
- Compensation
- Not announced
What leaked
IdentityPatient name, Gender
Account dataPatient ID
Special-care dataDiagnoses and admission and discharge dates
Not leaked
- Phone number
- Credit card information
How many
- Patients ~1,800 people
Who is affected
- Patients
Cause
Loss of a USB memory stick holding patient personal data
Timeline
- USB memory stick lost
- Found and recovered a few days later
- Announced
Response
- Change process
- Staff training
Enforced rules on taking media with personal data off site and strengthened staff training
What you should do
- Health data can't be taken back. Don't answer blackmail; call the police (#9110) or the consumer hotline (188)
- Check the company's notice to see if you're affected
Lessons for companies
- Report to the PPC: preliminary in 3–5 days, final in 30 (60 if malicious)
- Run red teaming and AI-assisted hardening, and publish how much you invest
Sources
- Cybersecurity-jp.com News · Jun 5, 2026