Jōō (貞応), also romanized as Jō-ō, was a Japanese era name (年号, nengō, lit. year name) after Jōkyū and before Gennin. This period spanned the years from April 1222 to November 1224.[1] The reigning emperor was Go-Horikawa-tennō.[2]
Change of era
1222Jōō gannen (貞応元年): The era name was changed to Jōō (meaning "Righteous Answer") to mark an event or a number of events. The previous era ended and a new one commenced in Jōkyū, on the 13th day of the 4th month of 1222.[3]
Events of the Jōō era
1222 (Jōō 2): Regulations established concerning salaries for Jitō
^Titsingh, Isaac. (1834). Annales des empereurs du Japon, pp. 238-241; Brown, Delmer et al. (1979). Gukanshō, pp. 341–343; Varley, H. Paul. (1980). Jinnō Shōtōki. pp. 226-227.