The oldest document which mentions Jōkō-ji is the Tōmyō-ji Document written in 1298 in the Kamakura period, in which it is stated that "Jōkō-ji of Higo Province was privately built by Shramana Ekū."
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These objects, designated Municipal Cultural Properties of Tamana in 2008, are on exhibit at Renge-in Tanjō-ji.