SHINDO3

Chiba Biodiversity Center

Chiba Prefecture

Personal data1,963people

POSSIBLE LEAKPostal address / Full nameUnauthorized access · Investigating

Open in the live monitor ▶
Disclosed
Sep 1, 2026
Detected
Aug 27, 2026
Detection to disclosure
5 days
Leak
Leak possible
Type
Unauthorized access
Status
Investigating
Security spend
Not checked yet
Compensation
Not announced

What leaked

IdentityFull name, Nickname
ContactAddress, Email address

How many

  • Members of the Life Abundance Survey Group 1,963 people

Who is affected

  • Members of the Life Abundance Survey Group

Cause

External unauthorized access created pages that should not exist on the site

Timeline

  1. Chiba police alerted the prefecture; logs confirmed the unauthorized access
  2. Website taken offline
  3. Alert emails sent to 832 people from a separately kept list
  4. First disclosure

Response

  • Service stopped
  • Forensic investigation
  • Notified individuals
  • Phishing warning

Took the site offline, investigated the server and commissioned a specialist; will republish after security measures

What you should do

  1. Don't open links in emails from this company. The apology email itself may be fake
  2. Watch for unexpected mail or invoices; your address is hard to change
  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