Columbia subject headings:
Japan--Foreign relations--Russia.
Kuril Islands (Russia)--International status.
Russia--Foreign relations--Japan.
Harvard subject headings:
Japan--Foreign relations--Soviet Union
Kuril Islands (Russia)--International status.
Soviet Union--Foreign relations--Japan
Princeton subject headings:
Japan--Foreign relations--Soviet Union.
Kuril Islands (Russia)--International status.
Soviet Union--Foreign relations--Japan.