Columbia subject headings:
Japan--Armed Forces.
Japan--Defenses.
National security--Japan--History--20th century.
National security--Japan--History--21st century.
Self-defense (International law)
Harvard subject headings:
Japan--Defenses.
National security--Japan--History.
Self-defense (International law)
Princeton subject headings:
Japan--Defenses.
National security--Japan--History.
Self-defense (International law)