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121116-N-EY938-586 — Fotopedia
EAST CHINA SEA (Nov. 16, 2012) Japan Maritime Self-Defense Force ship JS Chokai (DDG 176), USS Mustin (DDG 89), and JS Ariake (DD 109) steam together following the conclusion of Keen Sword, a regularly scheduled exercise that enables the United States and Japan to practice coordination procedures and improve interoperability required to effectively defend Japan or respond to a crisis in the Asia-Pacific region. (US Navy photo by Lt. Cmdr. Denver Applehans/Released)
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Japan Maritime Self-Defense Force

The Japan Maritime Self-Defense Force (海上自衛隊 Kaijō Jieitai?), or JMSDF, is the naval branch of the Japan Self-Defense Forces, tasked with the naval defense of Japan. It was formed following the dissolution of the Imperial Japanese Navy (IJN) after World War II. The JMSDF has a large fleet and its main tasks are to maintain control of the nation's sea lanes and to patrol territorial waters. It has also stepped up its participation in UN-led peacekeeping operations (PKOs) and Maritime Interdiction Operations (MIOs).