Emperor Ninmyō was the 54th emperor of Japan, according to the traditional order of succession. Ninmyō's reign lasted from 833 to 850, during the Heian period. His personal name (imina) was Masara (正良). After his death, he was given the title Ninmyō (仁明). Born: October 29, 810 Died: May 10, 850 In office: March 26, 833 – May 8, 850 Wiki link