Emperor Kōtoku Japanese emperors 2019.09.04 2019.07.02 The 36th Emperor of Japan. Emperor Kōtoku inherits the Y gene The period of reign 645 – 654 Another name 孝徳天皇(Emperor Kōtoku) 軽(Karu)難波朝(Naniwachou) Mausoleum of Emperor Kōtoku