is a district located in Fukui Prefecture, Japan. As of 2003, the district had an estimated population of 18,680 and a density of 133.18 persons per km2. The total area is 140.26 km2. Towns and villages Ōi Takahama Merger On March 3, 2006 the village of Natashō, from Onyū District, merged into the town of Ōi. Districts in Fukui Prefecture