Columbia subject headings:
Japan--Foreign relations--20th century.
Japan--Foreign relations--21st century.
National security--Japan.
Harvard subject headings:
Japan--Foreign relations--20th century.
Japan--Foreign relations--21st century.
Japan--Politics and government--21st century.
National security--Japan
Political leadership--Japan--History--21st century.
Princeton subject headings:
Japan--Foreign relations--20th century.
Japan--Foreign relations--21st century.
Japan--Politics and government--21st century.
National security--Japan.
Political leadership--Japan--History--21st century.