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	JS Kokuryū
History
Japan
Name	Kokuryū; (こくりゅう);
Namesake	Kokuryū (transl. black dragon)
Ordered	2010
Builder	Kawasaki Heavy Industries
Cost	¥64.3 billion
Laid down	21 January 2011
Launched	31 October 2013
Commissioned	9 March 2015
Homeport	Yokosuka
Identification	SS-506
Status	Active
General characteristics
Class and type	Sōryū-class attack submarine
Displacement	Surfaced: 2,900 tonnes (2,854 long tons); Submerged: 4,200 t (4,134 long tons);
Length	84.0 m (275 ft 7 in)
Beam	9.1 m (29 ft 10 in)
Draught	8.5 m (27 ft 11 in)
Propulsion	1-shaft 2× Kawasaki 12V 25/25 SB-type diesel engines diesel-electric; 4× Kawasaki Kockums V4-275R Stirling engines; 3,900 hp (2,900 kW) surfaced; 8,000 hp (6,000 kW) submerged;
Speed	Surfaced: 13 kn (24 km/h; 15 mph); Submerged: 20 kn (37 km/h; 23 mph);
Range	AIP endurance (est.): 6,100 nautical miles (11,300 km; 7,000 mi) at 6.5 knots (12.0 km/h; 7.5 mph)
Complement	65 (9 officers, 56 enlisted)
Sensors and ; processing systems	ZPS-6F surface/low-level air search radar; Hughes/Oki ZQQ-7 Sonar suite: 1× bow-array, 4× LF flank arrays and 1× Towed array sonar;
Electronic warfare ; & decoys	ZLR-3-6 ESM equipment; 2× 3-inch underwater countermeasure launcher tubes for launching of Acoustic Device Countermeasures (ADCs);
Armament	6 × HU-606 21 in (533 mm) torpedo tubes with 30 reloads[citation needed] for:; 1.) Type 89 torpedo; 2.) Harpoon (missile); Mines;

JS Kokuryū (SS-506) is the sixth boat of Sōryū-class submarines. She was commissioned on 9 March 2015.^[2]

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.^[3]