The Japan Maritime Self-Defense Force (JMSDF) Oyashio-class submarine JS Mochishio (SS 600) arrives at Joint Base Pearl Harbor-Hickam to begin an annual training exercise. Mochishio will be conducting both in-port and at-sea training on undersea tactics, anti-submarine warfare and war-time strategies. (U.S. Navy photo by Mass Communication Specialist 2nd Class Ronald Gutridge/Released)