On May 11, 2018, Kansai Electric Power Company’s Oi Nuclear Power Plant Unit 4, located in Fukui prefecture, resumed its power generation operations. Japan’s Nuclear Regulation Authority determined that Unit 4 met its current safety standards and gave permission to restart the unit. Unit 4 will gradually increase its power output until it is fully operational in early June this year. It is the third nuclear power reactor with a generation capacity of at least one-million-kW to resume operation in Japan, following Oi Nuclear Power Plant Unit 3 and Kyushu Electric Power's Genkai Nuclear Power Plant Unit 3.