Columbia subject headings:
Emperors--Japan--History--To 1500.
Japan--History--To 794.
Shinto--History--To 1185.
Harvard subject headings:
Emperors--Japan--History
Japan--History--To 794.
Japan--Religion--To 794.
Princeton subject headings:
Emperors--Japan--History.
Japan--History--To 794.
Japan--Religion--To 794.