Making his first public appearance since the nuclear accident at the Fukushima No. 1 power plant in March, the facility's general manager, Masao Yoshida, apologized for failing to prevent the triple meltdowns but emphasized that conditions at the plant have "definitely been stabilized."

Yoshida met reporters at the wrecked power station as Tokyo Electric Power Co., the plant's operator, allowed reporters to visit the facility for the first time since the March 11 earthquake and tsunami triggered the nuclear crisis.

"The first thing I would like to do is to apologize to the people of Fukushima and in the whole of Japan for causing them great trouble," Yoshida said.