is a subprefecture of Hokkaido Prefecture, Japan located on the Oshima Peninsula on the Sea of Japan side. It includes Okushiri Island. It was established in 1897.
Geography
Municipalities NameArea (km2)PopulationPop. DensityDistrictTypeMapRōmajiKanji Assabu厚沢部町460.583,8848.43Hiyama DistrictTown Esashi (capital)江差町109.578,11774.08Hiyama DistrictTown Imakane今金町568.145,5759.81Setana DistrictTown Kaminokuni上ノ国町547.585,1619.43Hiyama DistrictTown Okushiri奥尻町142.982,81219.67Okushiri DistrictTown Otobe乙部町162.553,92524.15Nishi DistrictTown Setanaせたな町638.678,50113.31Kudō DistrictTown
Mergers
History 1897: Hiyama Subprefecture was established. 2005: Kumaishi Town (Nishi District) was merged with Yakumo Town (Yamakoshi District, Oshima Subprefecture) and transferred to Oshima Subprefecture. At the same time, Hiyama Subprefecture was divided between north and south. 2014: Esashi Line (from Kikonai Station to Esashi Station) was abolished. Therefore, Hiyama Subprefecture became the only subprefecture in which there is no railway.
External links
Official Website