Yamamoto (山本町, Yamamoto-chō) was a town located in Mitoyo District, Kagawa Prefecture, Japan.
As of 2003, the town had an estimated population of 7,584 and a density of 227.68 persons per km2 (592.3 persons per mi2). The total area was 33.31 km2 (12.8 mi2).
On January 1, 2006, Mito, along with the towns of Mino, Nio, Saita, Takase, Takuma and Toyonaka (all from Mitoyo District), was merged to create the city of Mitoyo and no longer exists as an independent municipality.