Yamaguchi Dam () is one of a dozen or so dams on the Kiso River in the Nagano Prefecture, Japan. It was completed in 1957.
The word yamaguchi (å±±å£) means "Mountain Pass", and is a common place name in Japan. There are several dams with this name; for a list, see
The corresponding word in Chinese, written with the same characters, is read shankou. There are at least 2 dams in China with Shankou in their names: