Aizumi is a town located in Itano District, in northeastern Tokushima Prefecture, Japan. As of 30 June 2022, the town had an estimated population of 35,512 in 15198 households and a population density of 2200 persons per km2. The total area of the town is 16.27 square kilometres (6.28 sq mi).

Tokushima Prefecture is a prefecture of Japan located on the island of Shikoku. Tokushima Prefecture has a population of 728,633 and has a geographic area of 4,146 km2. Tokushima Prefecture borders Kagawa Prefecture to the north, Ehime Prefecture to the west, and Kōchi Prefecture to the southwest.