Emperor Kanmu , or Kammu, was the 50th emperor of Japan, according to the traditional order of succession. Kammu reigned from 781 to 806, and it was during his reign that the scope of the emperor's powers reached its peak.
Portrait of Emperor Kanmu, 16th century
Emperor Kōnin was the 49th emperor of Japan, according to the traditional order of succession. Kōnin's reign lasted from 770 to 781.
Emperor Kōnin