was a town located in Nakakoma District, Yamanashi Prefecture, Japan.
As of 2003, the town had an estimated population of 18,986 and a density of 471.35 persons per km<sup>2</sup>. The total area was 40.28 km<sup>2</sup>.
On September 1, 2004, Shikishima, along with the town of Futaba (from Kitakoma District), and the town of Ryà «à  (also from Nakakoma District), was merged to create the city of Kai.