SHINDO4

Mental Health and Welfare Center

Miyagi Prefecture

Personal data117records

LEAK UNCLEARDisability / Health / medical / treatmentLoss · Investigating

Open in the live monitor ▶
Disclosed
Aug 5, 2026
Detected
Apr 2026
Detection to disclosure
126 days
Leak
Unknown
Type
Loss
Status
Investigating
Security spend
Not checked yet
Compensation
Not announced

What leaked

Special-care data35 applications for a mental disability health and welfare certificate, 82 applications for an outpatient psychiatric care (self-support medical care) card

How many

  • Missing application forms (35 for disability certificates, 82 for medical care cards) 117 records
  • Applications with delayed issuance 289 records

Who is affected

  • Applicants

Cause

Application forms went missing; how they were lost has not been disclosed

Timeline

  1. Detected
  2. Consulted the police
  3. First disclosure

Response

Delayed cards will be processed promptly and issued with an apology

What you should do

  1. Health data can't be taken back. Don't answer blackmail; call the police (#9110) or the consumer hotline (188)
  2. Check the company's notice to see if you're affected

Lessons for companies

  1. Report to the PPC: preliminary in 3–5 days, final in 30 (60 if malicious)
  2. Run red teaming and AI-assisted hardening, and publish how much you invest

Sources