Ryuga-ike is an earthfill dam located in Yamanashi Prefecture in Japan.

The catchment area of the dam is km2.

The dam impounds about 3 ha of land when full and can store 264 thousand cubic meters of water.

The construction of the dam was completed in 1956.

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