仁にん安あんにんあんMeanings1nounNin'an era (1166–1169)historical termJapanese historical era name (年号) from the late Heian period, spanning 1166 to 1169 CE.仁にん安あん年ねん間かんに平清盛たいらのきよもりが太政大臣だいじょうだいじんに就しゅう任にんした。Taira no Kiyomori became Grand Minister of State during the Nin'an era.