Hongawa (本川村 Hongawa-mura) was a village located in Tosa District, Kōchi, Japan.
On October 1, 2004 Hongawa, alng with the village of Gohoku, from Agawa District, was merged into the expanded town of Ino, and no longer exists as an independent municipality.
As of 2003, the village had an estimated population of 749 and a density of 3.59 persons per km². The total area was 208.70 km².