was a town located in Kitaamabe District, Ōita Prefecture, Japan.
Population
As of 2003, the town had an estimated population of 12,367 and the density of 250.39 persons per km<sup>2</sup>. The total area was 49.39 km<sup>2</sup>.
History
On January 1, 2005, Saganoseki, along with the town of Notsuharu (from Kitaamabe District), was merged with the expanded city of Ōita.