Karasu (香良洲町 Karasu-chō) was a town located in Ichishi District, Mie, Japan.
On January 1, 2006 Karasu, along with the towns of Anō, Geinō and Kawage, the village of Misato, all from Age District, the towns of Hakusan and Ichishi, the village of Misugi, all from Ichishi District, and the city of Hisai, was merged into the expanded city of Tsu and no longer exists as an independent municipality.
As of 2003, the town had an estimated population of 5,281 and a density of 1,354.10 persons per km². The total area was 3.90 km².