Columbia subject headings:
Harvard subject headings:
Emperors--Japan--Biography
Japan--History--Heian period, 794-1185.
Kanmu, Emperor of Japan, 737-806.
Princeton subject headings:
Emperors--Japan--Biography.
Heian-kyō (Extinct city)
Japan--History--Heian period, 794-1185.
Kanmu, Emperor of Japan, 737-806.
Nagaokakyō (Extinct city)