In recent years, the Japanese government has been rapidly promoting the strengthening of defense forces in the "defense gap" in the southwest region. In 2016, Japan set up a coastal surveillance force on Yonaguni Island, Okinawa Prefecture, which is the closest to the mainland. In addition, it plans to set up a security force and an air defense and anti-ship missile force on Ishigaki Island. Due to historical reasons, the issue of setting up the Self-Defense Forces missile force on the islands of Okinawa has always been opposed by the local people, believing that this is the beginning of the disaster, and expressed that they would never be treated as poor cannon fodder like the Okinawa campaign of World War II. Okinawa residents believe that the small island where they live will be the first target in the event of a war when the missile force is deployed. However, due to the backward economic development of Okinawa, when the Japanese government publicized to the local area, it would emphasize the economic benefits brought about by the presence of the Self-Defense Forces members and their families on the island, which also led to differences in local opinions. In March last year, in order to strengthen the defense system of the Southwest Islands, the Ministry of Defense officially decided to reorganize the troops of the Ground Self-Defense Force and set up a new "Miyako Station" in Miyakojima City, Okinawa Prefecture. In recent years, the Japanese Ministry of Defense has gradually expanded the Ground Self-Defense Force missile force, which was originally deployed only on the main island of Okinawa, to Yonaguni Island (coastal surveillance force, 150 people) and Miyako Island (guard force, air defense and shore-to-ship missile force, 700 to 800). People) and other outer islands and Amami Oshima in Kagoshima Prefecture (guards, air defense and shore-to-ship missile units, 550 people), and will deploy guards and missile units on Ishigaki Island in the future. These islands will together form a network of missile positions in the southwest direction of Japan, forming a containment trend for the Miyako Strait. From the perspective of specific locations, the missiles deployed on these islands will pose a serious real threat to ships and aircraft traveling to and from the Miyako Channel.