Isobe (磯部町, Isobe-chō) was a town located in the former Shima District, Mie Prefecture, Japan. As of 2003, the town had an estimated population of 9,172 and a density of 117.29 persons per km². The total area was 78.20 km². On October 1, 2004, Isobe, along with the towns of Shima (former), Ago, Daiō and Hamajima (all from Shima District), was merged to create the city of Shima and no longer exists as an independent municipality.