was a town located in Higashikunisaki District, Ōita Prefecture, Japan. As of 2003, the town had an estimated population of 5,958 and the density of 142.40 persons per km2. The total area was 41.84 km2. On March 31, 2006, Musashi, along with the towns of Kunisaki (former), Aki and Kunimi (all from Higashikunisaki District), was merged to create the city of Kunisaki.