The Ōi Dam is a dam located between the cities of Ena and Nakatsugawa in Gifu Prefecture, Japan. It was built to produce electricity for the surrounding area. The Agi River flows through the dam.

The Maruyama Dam is a dam on the border of Mitake and Yaotsu in Gifu Prefecture, Japan. It was built on the upper reaches of the Kiso River system. It is a gravity dam that is 98.2 m tall. It is the s