SHINDO3

Ministry of Land, Infrastructure, Transport and Tourism

Cabinet Office staff~1,200people

POSSIBLE LEAKFull name / Email addressUnauthorized access · Investigating

Open in the live monitor ▶
Disclosed
Sep 17, 2025
Leak
Leak possible
Type
Unauthorized access
Status
Investigating
Security spend
Not checked yet
Compensation
Not announced

What leaked

IdentityFull name
ContactWork email address
Account dataUser ID
Employment & HRDepartment, Job title

Not leaked

  • No leak of personal or confidential information within MLIT

How many

  • Cabinet Office staff ~1,200 people

Who is affected

  • Cabinet Office staff

Cause

Cyberattack on the network used by the Kinki Regional Development Bureau, which affected the Cabinet Office's Okinawa General Bureau via the network

Timeline

  1. First disclosure

Response

  • Notified individuals
  • Forensic investigation

What you should do

  1. Don't open links in emails from this company. The apology email itself may be fake
  2. Expect targeted phishing posing as HR or interview contacts
  3. 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