All of Japan's 50 nuclear reactors are offline while regulators consider restarts under safety rules revised after the March 2011 earthquake and tsunami caused meltdowns at the Fukushima Dai-Ichi plant.
Restarts will require approvals from the Nuclear Regulation Authority and local governments.
The request to restart two reactors at Kashiwazaki-Kariwa, in Niigata Prefecture on the Japan Sea coast, brings to 14 the number of reactors that utilities want assessed.
TEPCO is seeking restarts of reactor Nos. 6 and 7, advanced boiling water reactors that are the newest at the plant.
The plant suffered a long list of radioactive leaks and malfunctions during from a magnitude 6.8 quake on July 16, 2007, but underwent repairs and tests after that.
TEPCO and other utilities are eager to restart at least some of the country's 50 operable reactors to help defray rising costs both from maintaining the nuclear plants and also from increased imports of gas and oil for conventional power plants needed to offset lost generating capacity.
Opposition lawmakers of the lower house grilled Hirose over a decision by TEPCO to delay use of measures now being considered to prevent radiation-tainted water from escaping into groundwater and the sea.
"You knew of this radioactive water problem more than two years ago," Masato Imai of the Democratic Party of Japan, which was in power at the time of the accident, told Hirose. "It appears your risk awareness was way too low," he said. "Why did you not act then?"
