The Japanese utility lost 400MW of power output since mid-November due to extended work on a turbine at the 1,700MW power plant, Reuters reported.

The company has now replaced a turbine wing at the No.4 series unit at the power plant.

Tohoku Electric Power is an electric utility, servicing approximately 7.6 million individual and corporate customers in six prefectures in Tohoku region plus Niigata Prefecture.