After<span> the defeat of </span>Japan<span> in </span>World War II<span>, the </span>United Statesled the Allies in the occupation and rehabilitation of theJapanese<span> state. Between 1945 and 1952, the </span>U.S.<span> occupying forces, led by General Douglas A. MacArthur, enacted widespread military, political, economic, and social reforms. Hope this helps!!!</span>
<span>Japan's U.S.-approved constitution granted full freedoms to its citizen, created a congress and renounced Japan's ability to make war, Getting rid of their army air force and navy. Since this did happen the U.S took responsibility for Japans security. </span>