Bookoff Group reports data breach affecting up to 6.43 million customer accounts

TOKYO — Japanese second-hand goods retailer Bookoff Group Holdings Ltd. has become the latest company to disclose a data breach after detecting unauthorized access to a member data management system at one of its subsidiaries.

In a notice issued on October 3, the company said information related to up to 6.43 million accounts may have been exposed in the incident.

Bookoff Group Holdings Ltd. operates a chain of second-hand retail stores in Japan. The company has not yet released details on the scope of the affected data or the specific cause of the unauthorized access.

The incident adds to a growing list of Japanese companies that have recently had to address information security incidents.