SHINDO3

Kyoritsu Maintenance

KYORITSU MAINTENANCE CO., LTD.

PhishingSize not disclosed

POSSIBLE LEAKPhone number / Full nameInvestigating

Open in the live monitor ▶
Disclosed
Dec 18, 2025
Detected
Oct 23, 2025
Detection to disclosure
56 days
Leak
Leak possible
Type
Phishing
Status
Investigating
Security spend
Not checked yet
Compensation
Not announced

What leaked

IdentityFull name
ContactPhone number, Email address

Who is affected

  • Residents
  • Residents' families
  • Business partners
  • Contractors
  • Facility tour applicants
  • Employees

Cause

A phishing email was the starting point of the attack, and a work computer was operated by a third party

Timeline

  1. Security software detected abnormal communication and the device was isolated
  2. Contained
  3. Reported to authority
  4. Date of the Security NEXT report

Response

  • Blocked the entry point
  • Forensic investigation

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. Expect targeted phishing posing as HR or interview contacts
  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