弘こう仁にんこうにんMeanings1nounKōnin eraJapanese era name spanning 810–824 CE. Used in historical contexts.弘こう仁にん年ねん間かんに最さい澄ちょうが天てん台だい宗しゅうを開ひらいた。Saichō founded the Tendai school during the Kōnin era.