Daiichi Kosho said on Oct. 8, 2026 that a malware infection at Nippon Columbia Group, its contractor, might have exposed roughly 8,631,000 customer files and 93,000 employee files. The leaked customer information consists of names, gender, birth dates, email addresses, and phone numbers.
Daiichi Kosho said the malware was found on a staff computer at Nippon Columbia Group on Oct. 5, 2026, and the system was separated the next day. It also said its own systems had not been breached and that Nippon Columbia Group changed authentication credentials while looking into the cause and scope. Daiichi Kosho advised customers to stay alert to unsolicited requests for personal or financial details.
The breach could impact users of karaoke venues such as Banana Club, B-GARAGE, DK Dining, Big Echo, MEGA BIG, and Karaoke CLUB DAM. Thus far, there is no sign that anyone had compromised passwords or abused loyalty points. Experts note the incident points to risks in third‑party data handling and stress the need for tighter security on entertainment‑sector platforms in Japan.
Daiichi Kosho said it has not confirmed any data theft or leaks. “Daiichi Kosho says it has not confirmed any data theft or leaks but is advising customers to remain cautious due to the potential risk.” — Daiichi Kosho
Join the discussion