TOKYO - A reactor at the Kashiwazaki-Kariwa nuclear power plant began power generation and transmission on a trial basis Monday, as Tokyo Electric Power Company Holdings Inc. geared up to resume nuclear power supply for the first time in 14 years.

TEPCO, still grappling with the aftermath of the 2011 Fukushima nuclear accident, plans to start full-fledged electricity transmission from the No. 6 unit at the seven-reactor plant in Niigata Prefecture on March 18. The complex is located 220 kilometers northwest of Tokyo.