was a town located in Naga District, Wakayama Prefecture, Japan.
As of 2003, the town had an estimated population of 8,090 and a density of 156.33 persons per km<sup>2</sup>. The total area was 51.75 km<sup>2</sup>.
On November 11, 2005, Momoyama, along with the towns of Kishigawa, Kokawa, Naga and Uchita (all from Naga District), was merged to create the city of Kinokawa.