Daiichi Kosho: vendor NCG malware may have exposed about 8.72M customer/employee records

Nippon Columbia Group employee PC infected with malware Oct 1–2, 2026; Daiichi Kosho data temporarily on that device may have leaked. Disclosed Oct 8 after Oct 5 vendor report. About 8,724,000 records (customers ~8.63M / staff ~93k after de-dup). Name, sex, DOB, email, phone. No intrusion into Daiichi systems. Actual exfiltration/misuse not confirmed.