The Kashiwazaki-Kariwa Nuclear Power Plant is the largest nuclear power plant in the world. This very large power plant is located on a 4.2 km² site in the Niigata Prefecture, Japan on the coast of the Sea of Japan. It is owned and operated by The Tokyo Electric Power Company or TEPCO. This plant, which is the world’s largest nuclear generating station in the world, was near the epicenter of the strongest earthquake to ever occur at a nuclear plant in 2007. It was completely shut down for 21 months following the earthquake. Two units since 2009 are now operational.