Arakawa (荒川町 Arakawa-machi) was a town located in Iwafune District, Niigata, Japan.
On April 1, 2008 Arakawa, along with the town of Sanpoku, and the villages of Asahi and Kamihayashi, all from Iwafune District, was merged into the city of Murakami.
As of 2003, the town had an estimated population of 11,334 and a density of 308.74 persons per km². The total area was 36.71 km². Its train station is called Sakamachi.