Taisei (大成町 -chō) was a town located in Kudō District, Hiyama, Hokkaidō, Japan.
On September 1, 2005 Taisei, along with the town of Kitahiyama, from Setana District, was merged into the expanded town of Setana, formerly from Setana District and now in Kudō District.
As of 2004, the town had an estimated population of 2,458 and a density of 18.36 persons per km². The total area was 133.91 km².