2026 Daiichikosho (Big Echo) — contractor malware; ~8.72M personal records possible
Data compromised
About 8.72 million personal records possibly exposed; press cite names, DOB, email, phone. Misuse not confirmed at disclosure.
Technical writeup
Verified company disclosure reported Oct 8–9, 2026 (NHK / Jiji / Nippon.com) — Daiichikosho (Big Echo karaoke) said personal information on about 8.72 million customers may have been compromised due to unauthorized access involving a system managed by an external contractor / malware on a contractor device. Press summarize fields including names, dates of birth, emails, and phone numbers. No illegal use confirmed at disclosure. Part of Japan’s autumn consumer-app breach wave.
Root cause
Malware / unauthorized access involving an external contractor’s system or employee device (company disclosure ~Oct 8)