The Kurobe Dam or Kuroyon Dam, is a variable-radius arch dam on the Kurobe River in Toyama Prefecture on the island of Honshū, Japan. It supports the 335 MW Kurobe No. 4 Hydropower Plant and is owned by Kansai Electric Power Company. At 186 metres (610 ft) high, it is the tallest dam in Japan. It was constructed between 1956 and 1963 at a cost of ¥51.3 billion yen. The project was a difficult engineering feat for the rapidly growing post–World War II Japan, and claimed the lives of 171 people
The Kurobe Dam is the most popular hydropower site in Japan and, between late June and mid-October, water is released from its spillway for onlookers. The surrounding Kurobe Gorge is also popular as well and is accessible by the Kurobe Gorge Railway. A novel turned film, Kurobe- no Taiyo (literally "The Sun of Kurobe"), starring Yujiro Ishihara (the late brother of Tokyo governor Shintaro Ishihara), recounts the drama of the project. In addition, the film "Project X" was also based on the dam's construction.