What were the factors leading to Japan's involvement in World War 2?

Answer 1

Japan pretty much started World War 2 on the Asian side. Japan attacked China and other Asian cities to gain power and land. I belive that Japan thought that they would get more land if they joined they axis side.

Answer 2

In Asia, Japan's efforts to become a world power and the rise of militarist leadership (in the 1930s, the government in Japan was undermined as militarists rose to power and gained de facto totalitarian control) led to conflicts first with China and later the United States. Japan also sought to secure additional natural resources, such as oil and iron ore, due in part to the lack of Natural Resources on Japan's own home islands.

Answer 3

On December 7, 1941, while German armies were freezing before Moscow, Japan suddenly pushed the United States into the struggle by attacking the American naval base at Pearl Harbor, Hawaii. Four days later Hitler declared war on the United States. President Roosevelt called on Congress for immediate and massive expansion of the armed forces. Twenty years of neglect and indifference, however, could not be overcome in a few days.

Answer 4

Japan's NEED for raw material (iron ore, copper, OIL, etc.) this meant EXPANSION.