was a town located in Monbetsu District, Abashiri Subprefecture (now Okhotsk Subprefecture), Hokkaido, Japan.
As of 2004, the town had an estimated population of 2,618 and a population density of 9.73 persons per km<sup>2</sup>. The total area was 269.10 km<sup>2</sup>.
On October 1, 2005, Ikutahara, along with the town of Maruseppu, and the village of Shirataki (all from Monbetsu District), was merged into the expanded town of Engaru.