Japan-U.S. relations are characterized by a strong partnership that began after World War II. The two countries signed the U.S.-Japan Security Treaty in 1960, which allows the U.S. to maintain military bases in Japan, ensuring mutual defense and stability in the Asia-Pacific region. Economically, Japan and the U.S. are major trading partners, with significant investments in each other's markets. They collaborate on various issues, including technology, climate change, and regional security, working together to address global challenges and promote peace and prosperity in the region.