Shōka
Shōka (正嘉?) was a Japanese era name (年号, nengō,?, lit. "year name") after Kōgen and before Shōgen. This period spanned the years from March 1257 to March 1259. The reigning emperor was Go-Fukakusa-tennō (後深草天皇?).
...
Wikipedia
Shōka (正嘉?) was a Japanese era name (年号, nengō,?, lit. "year name") after Kōgen and before Shōgen. This period spanned the years from March 1257 to March 1259. The reigning emperor was Go-Fukakusa-tennō (後深草天皇?).