琉球列島米国民政府
Unlike most mainland prefectural assemblies (Hokkaidō is another exception) the Okinawa Prefectural Assembly was not in existence continuously since 1878. After the Battle of Okinawa, the United States military governed the prefecture. The civilian branch of the military government was the United States Civil Administration of the Ryukyu Islands; a was created in 1952. After Okinawa's return to the mainland in 1972, the Prefectural Assembly was restored. Since then, it had been one of three prefectures in the country that do not elect their assemblies in unified local elections (last round: 2011), the other two being Ibaraki and Tokyo (In 2011, another three prefectures hit by the Great East Japan earthquake postponed their elections).