Kyushu Electric Power (TYO:9508) said that its unit, Kyushu Electric Power Transmission and Distribution Co., submitted a second report to Japan's Ministry of Economy, Trade and Industry on a missing external storage medium with customer information.
The report follows a request from the ministry after an external backup storage medium went missing from an unlocked cabinet inside a secured server room, according to a Wednesday filing with the Tokyo Stock Exchange.
The company said that the report details the facts surrounding the incident, its cause, and measures to prevent a recurrence, and no leakage of customer information has been confirmed so far.
The affected customers will be notified individually beginning in early August once the details are finalized.