Columbia subject headings:
Agriculture and state--Japan--History--To 1500.
Japan--Politics and government--794-1185.
Japan--Politics and government--To 794.
Japan--Social life and customs--To 1600.
Harvard subject headings:
Japan--Politics and government--794-1185.
Japan--Politics and government--To 794.
Princeton subject headings:
Japan--Politics and government--794-1185.
Japan--Politics and government--To 794.