Jō'ō (貞応) was a Japanese era after Jōkyū and before Gennin that spanned from 1222 to 1224. The reigning emperor was Emperor Go-Horikawa.

Jōō (承応) was a Japanese era name after Keian and before Meireki and spanned from 1652 to 1655. Reigning emperors were Go-Komyo and Go-Sai.