Columbia subject headings:
Japan--Foreign relations--To 1868.
Japan--History--Tokugawa period, 1600-1868.
Harvard subject headings:
Japan--Foreign relations--To 1868.
Japan--History--Tokugawa period, 1600-1868.
Princeton subject headings:
Japan--Foreign relations--To 1868.
Japan--History--Tokugawa period, 1600-1868.