SHINDO3

Asahi Kasei

Asahi Kasei Corporation

Insider misuseSize not disclosed

LEAK CONFIRMEDTrade secretsInvestigating

Open in the live monitor ▶
Disclosed
Sep 17, 2026
Leak
Leak confirmed
Type
Insider misuse
Status
Investigating
Security spend
Not checked yet
Compensation
Not announced

What leaked

Business dataLatent curing agent (manufacturing information)

Not leaked

  • Technical documents entrusted by business partners, personal data and the like were not included

Cause

A former employee kept trade secrets after retiring instead of returning them and was arrested for disclosing them to a Chinese company (Unfair Competition Prevention Act)

Timeline

  1. The company commented on the day the former employee's arrest was reported (piyolog)

Response

  • Governance / committee
  • Staff training

Stronger confidentiality controls, stricter exit procedures for departing staff and training for all employees (per piyolog)

What you should do

  1. 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