Daiichi Kosho, a major Japanese entertainment system maker, disclosed that a malware infection at its contractor, Nippon Columbia, exposed more than 8.7 million customer and employee records.
The company is the largest karaoke maker in Japan, operating 521 karaoke venues nationwide, including the Big Echo chain, one of the most popular karaoke box chains in the country.
Daiichi Kosho outsources the handling of its customers’ personal information to Nippon Columbia Group (NCG), a Japanese entertainment group whose businesses include music, video and game software production and distribution, as well as artist management.
The record company informed Daiichi Kosho on October 5 that it had discovered malware on an employee’s computer and isolated the affected system the following day.
Daiichi Kosho says it has not confirmed any data theft or leaks but is advising customers to remain cautious due to the potential risk.
The company says the exposed data contains records for 93,000 employees and 8,631,000 customers, which include:
- Full names
- Genders
- Dates of birth
- Email addresses
- Telephone numbers