Kyushu Electric Power misplaced an external backup drive storing personal details for up to 10.9 million customers after leaving it in an unlocked server-room cabinet. The drive contained names, addresses, usage data and phone numbers but no financial records, and the firm has reported the loss to police and regulators while investigating internal access.

• Kyushu Electric lost a backup drive holding personal data for up to 10.9 million customer accounts after it vanished from a locked cabinet in a secure server room, discovered missing a month after being stored (April 27 to May 26).
• The drive contained names, addresses, usage data, phone numbers, and retail electricity provider details, but no financial information.
• The company questioned all 57 people who had accessed the server room, filed a police report, and notified regulators including Japan's Personal Information Protection Commission.
• METI has ordered a full incident report with countermeasures by July 8, and it remains unclear whether the drive was stolen or lost through another security failure.