Kasasa (笠沙町 Kasasa-chō) was a town located in Kawanabe District, Kagoshima, Japan.
On November 7, 2005 Kasasa was merged with the town of Kinpō, from Hioki District, the towns of Bonotsu and Ōura, all from Kawanabe District, and the old city of Kaseda, to form the new city of Minamisatsuma and no longer exists as an independent municipality.
As of 2003, the town had an estimated population of 3,585 and the density of 89.89 persons per km². The total area was 39.88 km².