Futaba, YamanashiFutaba was a town located in Kitakoma District, Yamanashi Prefecture, Japan.As of 2003, the town had an estimated population of 13,483 and a density of 714.90 persons per km2. The total area was 18.86 km2.HistoryOn September 1, 2004, Futaba, along with the towns of Ryūō and Shikishima, was merged to create the city of Kai.