Ajimu, Ōita

Ajimu (安心院町, Ajimu-machi^?) was a town located in Usa District, Ōita Prefecture, Japan.

As of 2003, the town had an estimated population of 7,879 and the density of 53.54 persons per km². The total area was 147.17 km².

On March 31, 2005, Ajimu, along with the town of Innai (also from Usa District), was merged into the expanded city of Usa.