Columbia subject headings:
Okinawa-ken (Japan)--Politics and government--20th century.
Okinawa-ken (Japan)--Politics and government--21st century.
Harvard subject headings:
Okinawa-ken (Japan)--History--20th century.
Princeton subject headings:
Okinawa-ken (Japan)--Politics and government--20th century.
Okinawa-ken (Japan)--Politics and government--21st century.