Jōhen (城辺町 Jōhen-chō) was a town located in Minamiuwa District, Ehime, Japan.
On October 1, 2004 Jōhen was merged with the towns of Ipponmatsu, Mishō and Nishiumi, and the village of Uchiumi, all from Minamiuwa District, to form the new town of Ainan.
As of 2004, the town of Jōhen had an estimated population of 9,751. The total area was 75.37 km².