JS Narushio (SS-595) is the sixth boat of the Oyashio-class submarines.

[1] Narushio was laid down at Mitsubishi Heavy Industries Kobe Shipyard on 2 April 1999 and launched on 4 October 2001.

She was commissioned on 3 March 2003 and deployed to Yokosuka.

[2][3] The vessel participated in the major naval exercises RIMPAC 2004 and RIMPAC 2008.

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