SHINDO3

JR Tokai Takashimaya Co., Ltd.

Personal dataup to1,338records

POSSIBLE LEAKBank account / Full nameRansomware · Investigating

Open in the live monitor ▶
Disclosed
May 8, 2026
Detected
May 1, 2026
Detection to disclosure
7 days
Leak
Leak possible
Type
Ransomware
Status
Investigating
Security spend
Not checked yet
Compensation
Not announced

What leaked

IdentityFull name
ContactContact details
Financial & paymentBank account for salary payments

How many

  • Part-time staff contracted on or after March 1, 2021 up to 1,338 records

Who is affected

  • Part-time staff

Cause

Unauthorized access to the application server; suspected ransomware infection

Timeline

  1. Unauthorized access detected
  2. Announced

Response

  • Blocked the entry point
  • Service stopped
  • Forensic investigation

Disconnected the server from the network at once, suspended new part-time registrations and investigated with outside specialists

What you should do

  1. Scammers who know your account number pose as refund staff. No bank or company asks for your PIN
  2. Treat refund or apology calls and texts as scams. Call back only on the number from the official site
  3. Expect targeted phishing posing as HR or interview contacts
  4. Check the company's notice to see if you're affected

Lessons for companies

  1. Offline backups with restore drills; segment the network
  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