Columbia subject headings:
Japan--History--To 645.
Japan--Relations--Korea.
Korea--History--To 935.
Korea--Relations--Japan.
Harvard subject headings:
Japan--History--To 645
Japan--Relations--Korea.
Korea--History--To 935.
Korea--Relations--Japan.
Princeton subject headings:
Japan--History--To 645.
Japan--Relations--Korea.
Korea--History--To 935.
Korea--Relations--Japan.