Oshima Subprefecture
| Oshima Subprefecture 渡島総合振興局 | |
|---|---|
| Oshima-sōgō-shinkō-kyoku | |
| Prefecture | Hokkaido | 
| Capital | Hakodate | 
| Area | |
|  • Total | 3,936.32 km2 (1,519.82 sq mi) | 
| Population  (March 2009) | |
|  • Total | 449,371 | 
| • Density | 110/km2 (300/sq mi) | 
| Website | oshima.pref.hokkaido.lg.jp | 
Oshima (渡島総合振興局, Oshima-sōgō-shinkō-kyoku) is a subprefecture of Hokkaido Prefecture, Japan. As of 2004, it had a population of 456,621 and an area of 3,715.38 km2.
Hakodate Airport is located in the City of Hakodate.