The impact of the U.S. occupation of Japan after World War II was profound, leading to significant political, economic, and social transformations. Led by General Douglas MacArthur, the occupation aimed to demilitarize and democratize Japan. Key reforms included the adoption of a new constitution in 1947 that established a parliamentary democracy and guaranteed civil liberties. Economic reforms focused on land redistribution and labor rights, bolstering productivity and growth. The U.S. also provided financial assistance through the Marshall Plan. The occupation helped transform Japan into a prosperous, democratic nation, laying the groundwork for its emergence as a major global economic power.