Tohoku Electric Power on Wednesday restarted the No. 2 reactor at its Onagawa nuclear power plant in Miyagi Prefecture. The 825,000-kilowatt reactor had been taken offline soon after resuming operation for the first time in 13 years — since the March 2011 Great East Japan Earthquake and tsunami — after an issue was found with a measurement device.

To combat climate change, a lot of countries are spending billions on new and different kinds of nuclear reactors.

This is the first reactor barred in Japan under stricter safety protocols adopted after the Fukushima disaster.