Emperor Ninmyō Japanese emperors 2019.09.04 2019.07.05 The 54th Emperor of Japan. Emperor Ninmyō inherits the Y gene The period of reign 833 – 850 Another name 仁明天皇(Emperor Ninmyō) 正良(Masara)日本根子天璽豊聡慧尊(Yamatonekoamatsumishirushitoyosatonomikoto)深草帝(Fukakusanomikado) Mausoleum of Emperor Ninmyō