1912~1926
- April 4, 1913 Kaito (海東郡) and Kaisai (海西郡) (Merged to form Ama District)
- February 1, 1918 Muroran District (室蘭郡), Hokkaidō (The town of Muroran and the villages of Wanishi, Chimaibetsu, and Motomuroran merged to form the borough of Muroran (now the city of Muroran))
- April 1923 Furebetsu District (振別郡), Hokkaidō (The village of Furebetsu(振別村) merged with other villages to form the village of Rubetsu in Etorofu)
- April 1, 1925 Higashinari District (東成郡), Osaka (Merged into the city of Osaka)
- April 1, 1925 Nishinari District (西成郡), Osaka (Merged into the city of Osaka)
Read more about this topic: List Of Dissolved Districts Of Japan