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was a town located in Hita District, Ōita, Japan. On March 22, 2005, Ōyama merged with the other towns of the Hita District to form the city of Hita, Ōita.
As of 2003, the town had an estimated population of 3,729 and the density of 81.56 persons per km². The total area was 45.72 km².