Chubu Electric Power Company,Incorporated

Chubu Electric Power announced on the 27th that it had improperly billed construction costs to the Japan Nuclear Fuel Limited and Decommissioning Organization, which oversees the decommissioning progress of Units 1 and 2 at the Hamaoka Nuclear Power Plant in Shizuoka Prefecture. The company is conducting an investigation and is expected to disclose the detailed amount and circumstances in the future. This issue raises questions about the transparency of decommissioning work and the appropriateness of cost management.

A report by the investigation committee looking into data falsification at Chubu Electric Power's Hamaoka nuclear plant is expected to be released within this month. The report's focus is on how deeply successive management teams were involved in the misconduct, and it also points to failures in corporate governance. Depending on its contents, President Lin Xingu and Chairman Katsuno Tetsu could face questions over their management responsibility. In the Nuclear Regulation Authority's review aimed at restarting Hamaoka Units 3 and 4, the company came under suspicion of deliberately selecting and underestimating data related to the standard seismic ground motion. It set up the investigation committee in January to examine when the misconduct began and what motivated it. The falsification is believed to have been carried out from around 2012, and some are calling for Chairman Katsuno, who served as president from 2015 to 2020, to be held accountable. Despite multiple internal whistleblower reports from 2018 onward, the misconduct did not stop. Even after the Nuclear Regulation Authority began its investigation in May 2025, work believed to be aimed at concealing the misconduct, including overwriting data, was discovered. Whether senior management was involved is also a key focus of the investigation.

Chubu Electric Power announced on the 4th that its systems were subjected to unauthorized access, potentially leading to the leak of personal information of approximately 74,000 individuals, including those from group subsidiaries, business outsourcing partners, local governments, and business partners. The cause was the unauthorized use of identification information to access the systems, which may have allowed the viewing of employee emails and contact details of group staff. The incident came to light on July 29 following a report from a third-party organization, and no leak of electricity or gas customer information has been confirmed. The attack was not ransomware, and no system failures or impact on power supply occurred. The company is cooperating with Aichi Prefectural Police and others in an ongoing investigation.

Chubu Electric Power announced on the 29th that consolidated net profit for the fiscal year ending March 2027 is expected to fall 29.8% year-on-year to 160 billion yen. The company had not disclosed a full-year forecast at the start of the period due to factors such as the Middle East situation, but has now provided one for the first time. While earnings at JERA's domestic thermal and gas power generation business are improving, power procurement costs are rising at the retail sales unit Miraiz, and equipment expenses are also expected to increase due to inflation.

Regarding the data falsification issue concerning earthquake assumptions at the Hamaoka Nuclear Power Plant, Chubu Electric Power's Nuclear Division Director Tetsuya Toyoda and others attended the Special Committee on Nuclear Countermeasures on the 9th and apologized, saying they deeply regret the data overwriting and other matters.