Ama (海士町, Ama-chō) is a town located on Nakanoshima, in Oki District, Shimane Prefecture, Japan.

Emperor Go-Toba, defeated in the Jōkyū War in 1221, was exiled to the Oki Islands, and lived in Ama for 19 years until his death in 1239.

The average annual rainfall is 1,589.3 mm (62.57 in) with July as the wettest month.

[3] Ama came under the control of the Matsue Domain in the Edo period, and was divided into seven villages.

The town economy is primarily based on agriculture and commercial fishing.