The Maritime Self-Defense Force (MSDF) is the naval branch of the Japan Self-Defense Forces, responsible for the defense of Japan's waters and maritime interests. Established in 1954, the MSDF operates various vessels, including destroyers, submarines, and patrol aircraft, to ensure maritime security and conduct humanitarian missions. The MSDF plays a crucial role in disaster response and international peacekeeping efforts. It collaborates with other nations' navies for joint exercises and operations, promoting regional stability and security in the Asia-Pacific region. The force is committed to maintaining Japan's defense posture while adhering to its pacifist constitution.