Koshido Dam (越戸ダム) is a gravity dam located in Aichi Prefecture in Japan.

The dam is used for power production.

The dam impounds about 48 ha of land when full and can store 2876 thousand cubic meters of water.

The construction of the dam was started on 1926 and completed in 1929.

This article about a dam or floodgate in Chūbu region of Honshu, Japan is a stub.