Tenpō(天保) was a Japanese era name(年号,,nengō,, lit. "year name"), also known as Tempō, after Bunsei and before Kōka. The period started in December 1830 and ended in December 1844. During this time, the emperor was Ninko-tennō(仁孝天皇).
♯The Northern pretenders did not recognize the Genkō era. Gentoku was used in the Northern Court until 1332. ₪The Shōkyō era was recognized only by the Northern pretenders, not by the Southern Court. ‡ Upon reunification of the Northern and Southern Courts in 1392, Genchū was discontinued. Meitoku was used until 1394.