Columbia subject headings:
Harvard subject headings:
East Asia--Foreign relations--Japan.
Japan--Foreign relations--East Asia.
Japan--Foreign relations--To 1868--Sources.
Japan--Foreign relations--To 1868.
Princeton subject headings:
East Asia--Foreign relations--Japan.
Japan--Foreign relations--East Asia.
Japan--Foreign relations--Korea.
Japan--Foreign relations--To 1868--Sources.
Japan--Foreign relations--To 1868.
Korea--Foreign relations--Japan.