Jōhen (城辺町, Jōhen-chō) was a town located in Minamiuwa District, Ehime Prefecture, Japan.
As of 2004, the town of Jōhen had an estimated population of 9,751 and a density of 129.37 persons per km2.
On October 1, 2004, Jōhen, along with the towns of Ipponmatsu, Mishō and Nishiumi, and the village of Uchiumi (all from Minamiuwa District), was merged to create the town of Ainan.
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