How did Japan become the main enemy of the USA and the USSR in the Pacific?

After the accession to the throne of Emperor Hirohito and the adoption of Tanaka’s memoranda, an aggressive militocracy began to take shape in Japan. Japan has modernized its armed forces by actively cooperating militarily with Germany. Starting in 1932, with the fall of Shanghai, Japan began to actively interfere in the internal affairs of China, which ended in 1937 with the occupation of China. Japan reached the borders of the USSR and Mongolia, which could not but worry Moscow. Japan fought with the United States for domination in the Pacific.