日本最大の砂防ダムは何？
Below is a list of dams and reservoirs in Japan. As a nation of islands and narrow, steep valleys, dams play a vital role in Japanese society as they are constructed primarily to control floods, supply water and generate hydroelectric power. The tallest dam in Japan is the high Kurobe Dam. The largest dam by structural volume in the country is the Tokuyama Dam with of rock-fill. Tokuyama also creates Japan's largest reservoir with a water volume of . Some of the dams are listed below by prefecture.
Tokuyama Dam