Jōwa (承和?) was a Japanese era name (年号 nengō?, "year name") after Tenchō and before Kashō. This period spanned the years from January 834 through July 848. The reigning emperors were Junna-tennō (淳和天皇?) and Ninmyō-tennō (仁明天皇?).
By the Jōwa era, the formality of male promotions (Dansei jōi) were announced by the seventh day of each new year, while those for women (Onna jōi) were announced on the eighth day.