After the war and under the influence of the Supreme Commander of the Allied Powers, General Douglas MacArthur, Japanese political and religious life was reformed to produce a demilitarised and democratic country. Although a new constitution was established in 1947, it was not until the beginning of the Korean War that Japan (as an ally of the United States) saw a growth in its economy brought about by the manufacture of industrial goods. In 1946 the Prefabricated Housing Association was formed to try and address the chronic shortage of housing, and architects like Kunio Maekawa submitted designs. However, it was not until the passing of the Public Housing Act in 1951 that housing built by the private sector was supported in law by the government. Also in 1946, the War Damage Rehabilitation Board put forward ideas for the reconstruction of thirteen Japanese cities. Architect Kenzō Tange submitted proposals for Hiroshima and Maebashi.