富合町是过去位于日本熊本县中部的一个城镇，属下益城郡，已于2008年10月6日并入熊本市。

Tomiai(富合町,Tomiai-machi) was a town located in Shimomashiki District, Kumamoto Prefecture, Japan.

As of 2003, the town had an estimated population of 7,764 and the density of 396.32 persons per km². The total area was 19.59 km².

On October 6, 2008, Tomiai was merged into the expanded city of Kumamoto and no longer exists as an independent municipality. As of April 1, 2012, the area is part of the Minami-ku ward.