Wikipedia
Jōwa (Heian period)
was a after Tenchō and before Kashō. This period spanned the years from January 834 through July 848. The reigning emperors were and .
Jōwa (Muromachi period)
was a Japanese era or nengō which was promulgated by the more militarily powerful of two Imperial rival courts during the . This nengō came after Kōei and before Kannō and lasting from October 1345 through February 1350. The emperor in Kyoto was . Go-Kōgon's Southern Court rival in Yoshino during this time-frame was .