SHINDO2
Nishi-Nippon City Bank
Personal data7people
LEAK CONFIRMEDFull nameInsider misuse · Closed (final report)
Open in the live monitor ▶- Disclosed
- Apr 30, 2026
- Leak
- Leak confirmed
- Type
- Insider misuse
- Status
- Closed (final report)
- Security spend
- Not checked yet
- Compensation
- Not announced
What leaked
IdentityCustomer names (written on a whiteboard in the back office)
How many
- Personal data such as names of seven customers 7 people
Who is affected
- Customers
Cause
An employee filmed inside a branch back office and posted videos and images on social media, where they spread
Timeline
- Security NEXT report date; the organization's own announcement date was not confirmed
Response
- Notified individuals
- Staff training
- Governance / committee
Explained and apologized to each affected customer; will enforce compliance and information management to prevent recurrence
What you should do
- Check the company's notice to see if you're affected
Lessons for companies
- Report to the PPC: preliminary in 3–5 days, final in 30 (60 if malicious)
- Run red teaming and AI-assisted hardening, and publish how much you invest
Sources
- Security NEXT News · Apr 30, 2026