United States Civil Administration of the Ryukyu Islands
The Yumiko-chan Incident caused an increase in Okinawan opposition against the United States Civil Administration of the Ryukyu Islands and ten years of U.S. military occupation in Okinawa, and led to further debate over the continued presence of U.S. forces in Japan. It was the springboard for the first serious, coordinated anti-U.S. military protests in Okinawa following the beginning of the occupation in 1945.