Chōgen (長元?) was a Japanese era name (年号,, nengō,?, lit. "year name") after Manju and before Chōryaku. This period spanned the years from July 1028 through April 1037. The reigning emperors were Go-Ichijō-tennō (後一条天皇?) and Go-Suzaku-tennō (後朱雀天皇?).
