Two main ambitions may be said to have caused Japan to become involved in World War II. The first was the ambition to be economically independent or, at least, richer in Natural Resources, especially oil and various metals important for Japan's industry. The second was a matter of national pride: Japan felt very keenly the ambition to stand on equal, even superior, terms with western nations, particularly the United States.
do you mean what caused us entry into world war one? if so then the sinking of the USS Lusitania by German u-boats was what caused American entry into the war
World War.
Emperor Hirohito.
Japans attack on Pearl Harbor on Sunday,December 7th, 1941 at approximatley 7:50 am
yes
Japan had an Emporer.
General Tojo
USA
Pearl Harbor
racism, resouces, revenge
The United States.
Militarism, the other three causes for US entry into the war are imperialism nationalism and alliances.