SHINDO5

Unimat Life Co., Ltd.

Customers126,947people

LEAK CONFIRMEDPostal address / Phone numberMisdelivery · Contained

Open in the live monitor ▶
Disclosed
Jul 3, 2026
Leak
Leak confirmed
Type
Misdelivery
Status
Contained
Security spend
Measures, no amount
Compensation
Not announced

What leaked

IdentityFull name
ContactAddress, Phone number, Email address
Employment & HRCompany name (employer)

How many

  • Customers 126,947 people

Who is affected

  • Customers

Cause

An Excel order form sent to business partners still contained a customer list that should have been kept in a separate file

Timeline

  1. First disclosure

Response

  • Data deleted
  • Notified individuals
  • Hotline
  • Change process

All recipients confirmed deletion and no onward forwarding. Customers with known contact details were notified by email. Use of the order form was banned immediately. Dedicated helpline (0120-102-349, weekdays 9:00-17:45)

What you should do

  1. Don't open links in emails from this company. The apology email itself may be fake
  2. Treat refund or apology calls and texts as scams. Call back only on the number from the official site
  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. 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