JS Kokuryū (SS-506)
JS "Kokuryū" (SS-506) is the sixth boat of Sōryū-class submarines. She was commissioned on 9 March 2015. Construction and career. Kokuryū was laid down at Kawasaki Heavy Industries Kobe Shipyard on January 21, 2011 as the 2010 plan 2900-ton submarine No. 8121 based on the medium-term defense capability development plan. At the launching ceremony, it was named "Kokuryū" and launched on 31 October 2013. She’s commissioned on 9 March 2015 and deployed to Yokosuka. "Kokuryū" homeport is Yokosuka.