Hiroo District in Tokachi Subprefecture.
Hiroo (広尾郡 Hiroo-gun) is a district located in Tokachi Subprefecture, Hokkaido, Japan.
As of 2004, the district has an estimated population of 16,735 and a density of 10.80 persons per km². The total area is 1,550.06 km².
Towns and villages
- April 1, 1906 Taiki Village, Rekifune Village, and part of Tōbui Village from the former Tōbui District merge with Moyori Village (now Hiroo Town)
- April 1, 1955 Part of Ōtsu Village, Tokachi District incorporated into Taiki Town.
- On February 6, 2006 the village of Chūrui merged into the town of Makubetsu, in Nakagawa (Tokachi) District.
Coordinates: 42°28′12″N 143°10′12″E / 42.47000°N 143.17000°E