Oshima Province

Oshima Province (渡島国) was a short-lived province located in Hokkaidō. It corresponded to the southern part of today's Oshima and Hiyama Subprefectures

History
After 1869, the northern Japanese island was known as Hokkaido; and regional administrative subdivisions were identified, including Oshima Province.
 * August 15, 1869 Oshima Province established with seven districts
 * 1872 Census reports 75,830 inhabitants of the province
 * July, 1881 Tsugaru District and Fukushima District merged to form Matsumae District, reducing the number of districts to six.
 * 1882 Provinces dissolved in Hokkaidō.

Districts

 * Kameda (亀田郡, -gun))
 * Kayabe (茅部郡)
 * Kamiiso (上磯郡)
 * Fukushima (福島郡), merged with Tsugaru District in 1881 to form Matsumae District
 * Tsugaru (津軽郡), merged with Fukushima District in 1881 to form Matsumae District
 * Hiyama (檜山郡)
 * Nishi (爾志郡)