SHINDO3

Shingaku Navi

Kids Corporation

Unauthorized accessSize not disclosed

POSSIBLE LEAKPostal address / Date of birthClosed (final report)

Open in the live monitor ▶
Disclosed
Sep 11, 2025
Leak
Leak possible
Type
Unauthorized access
Status
Closed (final report)
Security spend
Not checked yet
Compensation
Not announced

What leaked

IdentityFull name, Date of birth, Gender, High school name and grade
ContactAddress, Phone number, Email address

Who is affected

  • High school students and others

Cause

Attacked from specific overseas IP addresses

Timeline

  1. Attack from specific overseas IP addresses detected
  2. Intrusion stopped
  3. Reported to authority
  4. Service restored
  5. Date of the Security NEXT report

Response

  • Vulnerability testing

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. Report to the PPC: preliminary in 3–5 days, final in 30 (60 if malicious)
  2. Run red teaming and AI-assisted hardening, and publish how much you invest

Sources