Yamakuni, Ōita
（重定向自Yamakuni）
Yamakuni(山国町,Yamakuni-machi) was a town located in Shimoge District, Ōita Prefecture, Japan.
As of 2003, the town had an estimated population of 3,317 and the density of 27.68 persons per km². The total area was 119.85 km².
On March 1, 2005 Yamakuni, along with the towns of Hon'yabakei and Yabakei, and the village of Sankō (all from Shimoge District), was merged into the expanded city of Nakatsu.