Final answer:
Japan was occupied by the U.S. after WWII and transitioned into a democratic ally with U.S. assistance, becoming an economic leader and a stable democratic nation.
Step-by-step explanation:
After World War II, Japan was briefly occupied by the U.S. but soon became a democratic, self-governing ally of the United States. The occupation, led by General Douglas MacArthur, lasted from 1945 until 1952. During this time, the U.S. oversaw the transition to a democratic government, with Japan adopting a new constitution and making significant societal reforms. Women gained the right to vote, and Japan was limited to a self-defense military force, emphasizing peace in its new structure. Economic aid and security guarantees from the U.S. helped Japan recover and grow into a flourishing democracy and economic powerhouse, exemplified by its success in electronics and automotive industries. The cooperation between Japan and the U.S. during the occupation played a crucial role in establishing the foundation for a long-lasting alliance.