SHINDO3

Komatsushima City

Personal data records1,906records

LEAK CONFIRMEDTrade secrets / Full nameMisdelivery · Closed (final report)

Open in the live monitor ▶
Disclosed
Jun 25, 2026
Detected
Jun 19, 2026
Detection to disclosure
6 days
Leak
Leak confirmed
Type
Misdelivery
Status
Closed (final report)
Security spend
Not checked yet
Compensation
Not announced

What leaked

IdentityFarmers' names
Business dataFarmland location, area and crop
Transactions & activityWhether subsidies were applied for; start and end of farmland lease contracts

How many

  • Personal data records 1,906 records
  • Farmland parcel records 15,372 records

Who is affected

  • Farmers

Cause

Staff attached a file with all farmers' data when only one record should have been sent

Timeline

  1. Misdirected email sent
  2. Detected
  3. First disclosure

Response

  • Data deleted
  • Notified individuals

Contacted the recipient and confirmed deletion of the email and attachment; apologized to affected people in writing; reported to the relevant authorities

What you should do

  1. Check the company's notice to see if you're affected

Lessons for companies

  1. Use DLP: recipient checks, send delay, automatic attachment protection
  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