U.S.-Japan relations are characterized by a strong partnership that has evolved since the end of World War II. The two countries signed the U.S.-Japan Security Treaty in 1960, which allows the United States to maintain military bases in Japan, ensuring mutual defense and stability in the Asia-Pacific region. Economically, the U.S. and Japan are major trading partners, with significant investments in each other's markets. Both nations collaborate on various global issues, including climate change, trade agreements, and regional security, reflecting their commitment to a stable and prosperous international order.