SHINDO2

Sado Toki Fan Club

Sado City

Personal data4,111people

POSSIBLE LEAKEmail addressUnauthorized access · Contained

Open in the live monitor ▶
Disclosed
Jun 19, 2026
Detected
Jun 17, 2026
Detection to disclosure
2 days
Leak
Leak possible
Type
Unauthorized access
Status
Contained
Security spend
Not checked yet
Compensation
Not announced

What leaked

ContactEmail address

How many

  • Members whose email addresses may have leaked 4,111 people

Who is affected

  • Sado Toki Fan Club members registered for the newsletter

Cause

Unauthorized access to an outside provider's mail-delivery system used by the contractor

Timeline

  1. Unauthorized access confirmed
  2. First disclosure

Response

  • Phishing warning
  • Notified individuals

Warned members about spam, phishing and other secondary harm

What you should do

  1. Don't open links in emails from this company. The apology email itself may be fake
  2. 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. 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