Nuclear Regulation Authority said that errors were found one after another in the submitted materials during the examination of Unit 2 of the Tsuruga Nuclear Power Plant in Fukui Prefecture. The NRA has asked for the application to be revised by August, and Chairman Shinsuke Yamanaka said, "I hope this will be the last time we will do this" Japan Nuclear Power was established in 1957 under the leadership of major private power companies to introduce commercial nuclear power plants in the country.