Columbia subject headings:
Japan--History.
Harvard subject headings:
Japan--History--Heian period, 794-1185.
Japan--History--Hōgen and Heiji Insurrections, 1156-1159
Japan--History--Kamakura period, 1185-1333.
Japan--History--Period of northern and southern courts, 1336-1392.
Princeton subject headings:
Japan--History--Kōbe Incident, 1868.