Columbia subject headings:
Harvard subject headings:
East Asia--Relations--Japan.
Japan--History--1185-1600.
Japan--Relations--East Asia.
Ryukyu Islands--History.
Tōhoku Region (Japan)--History.
Princeton subject headings:
East Asia--Relations--Japan.
Japan--History--1185-1600.
Japan--Relations--East Asia.
Ryukyu Islands--History.
Tōhoku Region (Japan)--History.