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