Final answer:
The USA and Japan carried out the Treaty of San Francisco after the war was over in the Pacific. This treaty restored Japan's sovereignty and officially ended the United States' occupation of Japan. Japan renounced its claims to territories it had previously controlled and received economic assistance from the United States.
Step-by-step explanation:
After the war was over in the Pacific, the USA and Japan carried out an agreement known as the Treaty of San Francisco. This treaty was signed in 1951 and came into effect in 1952. It officially ended the occupation of Japan by the United States and restored Japan's sovereignty. Under the treaty, Japan renounced all claims to territories it had previously controlled, including Taiwan and Korea. The United States guaranteed Japan's security and provided economic assistance for its reconstruction.