was a district located in Ōita Prefecture, Japan.
As of 2003, the district had an estimated population of 33,239 and the density of 47.09 persons per km<sup>2</sup>. The total area was 705.90 km<sup>2</sup>.
Towns and villages
- Honjō
- Kamae
- Kamiura
- Naokawa
- Tsurumi
- Ume
- Yayoi
- Yonōzu
Merger
- On March 3, 2005 the towns of Kamae, Kamiura, Tsurumi, Ume and Yayoi, and the villages of Honjō, Naokawa and Yonōzu were merged into the expanded city of Saiki.