The Kurobe Dam or Kuroyon Dam, is a 186 m high variable-radius arch dam on the Kurobe River in Toyama Prefecture, Japan. The tallest dam in Japan, it supports the 335 MW Kurobe No. 4 Hydropower Plant and is owned by Kansai Electric Power Company. It was constructed between 1956 and 1963 at a cost of 51.3 billion yen.