was a district located in Toyama Prefecture, Japan. As of 2003, the district had an estimated population of 34,491 and a density of 53.31 persons per km2. The total area was 646.98 km2. Towns and villages Ōsawano Ōyama History On April 1, 2005, the towns of Ōsawano and Ōyama, along with the towns of Fuchū and Yatsuo, and the villages of Hosoiri and Yamada (all from Nei District), were merged into the expanded city of Toyama. Therefore, Kaminiikawa District and Nei District were dissolved as a result of this merger. Former districts of Toyama Prefecture