Shōgen

Shōgen (承元^?) was a Japanese era name (年号,, nengō,^?, lit. "year name") after Shōka and before Bun'ō. This period spanned the years from March 1259 through April 1260. The reigning emperors were Go-Fukakusa-tennō (後深草天皇^?) and Kameyama-tennō (亀山天皇^?).

...
Wikipedia