The Kanna Dam (漢那ダム) is a concrete gravity dam on the Kanna River in Ginoza, Okinawa Prefecture, Japan.

The purpose of the dam is water supply and flood control.

After studies were carried out in the 1970s(starting in 1973 and ending in 1978), construction on the dam began in 1982 and it was completed in 1992.

In order to retain the reservoir, a 37 m (121 ft) tall and 500 m (1,640 ft) long saddle dam was constructed directly northeast of the dam.

Mangroves downstream of the dam were restored after construction and the area is a tourist destination along with a habitat for water fowl.