The Fukushima I Nuclear Power Plant often referred to asFukushima Dai-ichi, is a nuclear power plant located in the town of Okuma in the Futaba District of Fukushima Prefecture, Japan, first commissioned in 1971. The plant consists of six boiling water reactors. These light water reactors drive electrical generators with a combined power of 4.7 GWe, making Fukushima I one of the 15 largest nuclear power stations in the world. Fukushima I was the first nuclear plant to be constructed and run entirely by the Tokyo Electric Power Company (TEPCO). The plant suffered major damage from the 9.0 earthquake and subsequent tsunami that hit Japan on March 11, 2011, disabling the reactor cooling systems and triggering a widespread evacuation surrounding the plant.

The Fukushima II Nuclear Power Plant, 11.5 kilometres (7.1 mi) to the south, is also run by TEPCO.