SHINDO6

Tokushima Prefecture

ID documents~180,000recordsof ~460,000 records affected in total

POSSIBLE LEAKMy Number / Postal addressLoss · Investigating

Open in the live monitor ▶
Disclosed
Aug 10, 2026
Detected
Jun 23, 2026
Detection to disclosure
48 days
Leak
Leak possible
Type
Loss
Status
Investigating
Security spend
Not checked yet
Compensation
Not announced

What leaked

IdentityFull name, Date of birth, Gender
ContactAddress
ID documentsMy Number (individual number)

Not leaked

  • No bank account or credit card information is included (per piyolog)

How many

  • Access-log records containing personal data (cumulative) ~460,000 records
  • Records including My Number ~180,000 records
  • Missing hard drives 2 files

Who is affected

  • Residents

Cause

Backup HDDs returned at lease end went missing at the leasing company's subcontractor (a reuse center in Higashi-Osaka) before disposal

Timeline

  1. Logs from late 2013 to December 2025
  2. HDDs returned to the leasing company NEC Capital Solutions
  3. Two drives found missing in a pre-disposal count (at the subcontractor)
  4. Leasing company reported to the prefecture
  5. 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 The stronger loan self-restriction scheme also blocks your own borrowing and can't be withdrawn for 3 months.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. Watch for unexpected mail or invoices; your address is hard to change
  4. Check the company's notice to see if you're affected

Lessons for companies

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

Sources