Who were Japan's arch enemies in World War 2?

Answer 1

At the beginning, Japan was fighting with China. Later they also invaded Mongolia and part of the Soviet Union. As Japan began seizing European colonies in the southeast Asian area, Great Britain became more involved. Once Japan joined Germany and Italy to form the Axis powers, they also inherited all the enemies of those two countries. Obviously the USA was drawn into the war against Japan when Japan attacked Pearl Harbor, but relations between the two countries were already very strained after Japan occupied French Indochina and the US placed an embargo on oil exports to Japan and froze Japanese assets.