According to Amac News: Citing the operator of the power plant, this was the first reactor that was activated after the 2011 earthquake and tsunami disaster in this area.
He said that the activity of this reactor has been stopped in order to carry out a series of investigations.
According to Kyodo News, Tohoku Electric Power Company has announced that it is having trouble sending a device to confirm the condition of Reactor No. 2 at the Onagawa Power Plant in Miyagi Prefecture.
The reactor was restarted last Tuesday after meeting strict safety standards imposed following the Fukushima Daiichi nuclear power plant crisis.
Tohoku Electric Power had planned to resume power generation and transmission on Sunday.
The restart of the Onagawa reactor was the first time in Japan that a boiling water reactor - the same type as the Fukushima Daiichi reactors that suffered a fuel meltdown - has come online since the 2011 disaster.