Mikawa (三加和町, Mikawa-machi) was a town located in Tamana District, Kumamoto Prefecture, Japan.
As of 2003, the town had an estimated population of 5,533 and a density of 91.48 persons per km2. The total area was 60.48 km2.
On March 1, 2006, Mikawa, along with the town of Kikusui (also from Tamana District), was merged to create the town of Nagomi and no longer exists as an independent municipality.