Kasasa (笠沙町 Kasasa-chō?) was a town located in Kawanabe District, Kagoshima Prefecture, Japan.
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.
On November 7, 2005, Kasasa, along with the city of Kaseda, the town of Kinpō (from Hioki District), and the towns of Bonotsu and Ōura (all from Kawanabe District), was merged to create the city of Minamisatsuma and no longer exists as an independent municipality.