Kōgen (康元) was a Japanese era name (年号, nengō, lit. "year name") after Kenchō and before Shōka. This period spanned the years from October 1256 to March 1257.[1] The reigning emperor was Go-Fukakusa-tennō (後深草天皇).[2]
Preceded by | Era or nengō Kōgen 1256–1257 |
Succeeded by |
Japanese era names (nengō) by period
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