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) Notes References Nussbaum, Louis-Frédéric and Käthe Roth. (2005). Japan encyclopedia. Cambridge: Harvard University Press. ; OCLC 58053128 Former provinces of Japan