JMSDF Commissioned its 9th Soryu-class SSK SS-509 JS Seiryu Monday, 19 March 2018 Army, Defence, Military, News, World The Japan Maritime Self-Defense Force (JMSDF) commissioned its 9th Soryu-class diesel-electric attack submarine (SSK) in Kobe in Hyogo Prefecture on March 12, 2018. JS Seiryu (SS-509) joins the JMSDF’s Submarine Flotilla 2, based in Yokosuka. Read More Read More Tweet Subscribe to receive free email updates: