The United States Military Government of the Ryukyu Islands abbr. USMGR (琉球列島米国軍政府, Japanese: Ryūkyū-rettō Beikoku Gunseifu, Okinawan: Rūcū ʔAmirika Minhyōjōju), also referred to as U.S. Ryukyu Islands, was the government in the Ryukyu Islands, Japan (centered on the Okinawa Island) from 1945 to 1950, whereupon it was replaced by the United States Civil Administration of the Ryukyu Islands (USCAR).