was a town located in Kikuchi District, Kumamoto Prefecture, Japan.
As of 2003, the town had an estimated population of 28,479 and a density of 1,172.94 persons per km<sup>2</sup>. The total area was 24.28 km<sup>2</sup>.
On February 27, 2006, Nishigà Âshi, along with the former town of Kà Âshi (also from Kikuchi District), was merged to create the city of Kà Âshi and no longer exists as an independent municipality.