Dealing with the aftermath of nuclear disaster at Fukushima No.1 power plant remains the most important mission for Tokyo Electric Power Company Holdings Inc., Tomoaki Kobayakawa, Tepco's new president, said Friday, but he also stressed the need to restart nuclear plants for the sake of continuing the utility's business.

"To fulfill responsibilities over (disaster in) Fukushima is the fundamental (policy) for our company, and that will never change at all," Kobayakawa, the former chief of the Tepco's electricity retail arm, said at a news conference at the firm's headquarters in Tokyo.

Kobayakawa officially took the helm as head of the ailing power giant after the reshuffle of top management was approved at a shareholder's meeting earlier on Friday.