Ouchiyama (大内山村 Ōuchiyama-mura) was a village located in Watarai District, Mie, Japan.
On February 14, 2005 Ōuchiyama was merged with the towns of Kisei and Ōmiya, all from Watarai District, to form the new town of Taiki and no longer exists as an independent municipality.
As of 2003, the village had an estimated population of 1,543 and a density of 23.84 persons per km². The total area was 64.73 km².