How did America destabilize (weaken) Japan?

1)       In the initial years of Second World War, Japan was neutral.

2)       America was dissatisfied with Japanese Invasion of China since American interests were in danger.

3)       Japan had forced its army into Indo China region in 1941.

4)       As a result, America imposed economic sanction against Japan which made Japan agree for negotiations.

5)       However, after 1941, when Japan came under the control of General Tojo, Japan could not put up with the economic sanction imposed by America.

6)       Out of frustration Japan attacked Pearl Harbour, the naval center of America on 7th December 1941.

7)       This attack caused huge loss to America and forced America's entry into the war.

8) In 1945, American air force destroyed Hiroshima and Nagasaki, the two cities in Japan which made Japan surrender unconditionally. Thus, Japan destablished by America