Columbia subject headings:
Japan--Boundaries.
Japan--Foreign relations--1989-
Kuril Islands (Russia)--International status.
Senkaku Islands--International status.
Territory, National--Japan--History.
Tok Island (Korea)--International status.
Harvard subject headings:
Japan--Boundaries.
Japan--Foreign relations--21st century.
Kuril Islands (Russia)
Senkaku Islands--International status.
Territory, National--Japan.
Tok Island (Korea)
Princeton subject headings: