was a village located in Iwafune District, Niigata Prefecture, Japan.
As of 2003, the village had an estimated population of 10,228 and a density of 124.46 persons per km<sup>2</sup>. The total area was 82.18 km<sup>2</sup>.
On April 1, 2008, Kamihayashi, along with the towns of Arakawa and Sanpoku, and the village of Asahi (all from Iwafune District), was merged into the expanded city of Murakami.