Japan was on the brink of economic collapse after World War II. However, the structural reform and economic revival of Japan since 1946, as well as the "The Extraordinary Demand for Korean War " brought about by the Korean War in 1950, made Japan take an important step in the reconstruction after its defeat. At the same time, on the other side of the ocean, the United States also played an important role in Japan's reconstruction. The interaction between the United States and Japan in the early postwar period constituted the basic international situation in Asia before the Cold War, and this interaction also reflected the different positions and needs of the two countries in this special period.