Tokyo Electric Power Co. is having difficulty sticking to its 10-year restructuring plan as its nuclear reactors remain idle, a key member of a government-backed fund providing financial assistance to Tepco said Thursday.

"Because the restarting of the Kashiwazaki-Kariwa plant is falling further behind schedule, it is a fact that differences between the business plan (and the current situation) are widening," Yoshiharu Kawabata told reporters, referring to the complex in Niigata Prefecture, the biggest of Tepco's three nuclear plants.

Kawabata, head of the decision-making board of the Nuclear Damage Liability Facilitation Fund, made the remarks after he met with Tepco President Naomi Hirose.