SHINDO3

Osaka City

Examinees16people

POSSIBLE LEAKHealth insurance card / Health / medical / treatmentLoss · Closed (final report)

Open in the live monitor ▶
Disclosed
Jan 27, 2026
Detected
Jan 6, 2026
Detection to disclosure
21 days
Leak
Leak possible
Type
Loss
Status
Closed (final report)
Security spend
Not checked yet
Compensation
Not announced

What leaked

IdentityName, Date of birth, Gender
ContactAddress, Phone number
ID documentsInsurance status
Special-care dataQuestionnaire answers and X-ray findings

How many

  • Examinees 16 people

Who is affected

  • Tuberculosis screening examinees

Cause

The forms went missing during transfer between the main and branch buildings of the Nishinari Ward Health and Welfare Center

Timeline

  1. After data entry at the main building
  2. Detected
  3. First disclosure

What you should do

  1. ID numbers can never be changed. Request your credit file from CIC, JICC and others and look for contracts or loans you didn't make
  2. Register a self-declaration (honnin shinkoku) with the credit bureaus so lenders check applications in your name more carefully. The stronger loan self-restriction scheme also blocks your own borrowing and can't be withdrawn for 3 months. Neither stops bank accounts being opened
  3. Health data can't be taken back. Don't answer blackmail; call the police (#9110) or the consumer hotline (188)
  4. Treat refund or apology calls and texts as scams. Call back only on the number from the official site
  5. Watch for unexpected mail or invoices; your address is hard to change
  6. Check the company's notice to see if you're affected

Lessons for companies

  1. Don't keep ID or bank data: delete after checks or use a KYC provider
  2. Report to the PPC: preliminary in 3–5 days, final in 30 (60 if malicious)
  3. Run red teaming and AI-assisted hardening, and publish how much you invest

Sources