JS Seiryū
History
Japan
Name	Seiryū (せいりゅう)
Namesake	Seiryūgongen (清瀧権現)
Ordered	2013
Builder	Mitsubishi Heavy Industries
Cost	¥64.3 billion
Laid down	22 October 2013
Launched	12 October 2016
Commissioned	12 March 2018
Homeport	Yokosuka
Identification	SS-509
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)[1]
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)[1]
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 Seiryū (SS-509) is the ninth boat of Sōryū-class submarines. She was commissioned on 12 March 2018.^[2]

Seiryū was laid down at Mitsubishi Heavy Industries Kobe Shipyard on October 22, 2013, as the 2013 plan 2900-ton submarine No. 8124 based on the medium-term defense capability development plan. At the launching ceremony, it was named Seiryū and launched on 12 October 2016. She was commissioned on 12 March 2018 and deployed to Yokosuka, which became her homeport.^[3]

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  JS Seiryū at Kobe on 23 October 2016.
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  JS Seiryū at Kobe on 23 October 2016.
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  JS Seiryū at Kobe on 23 October 2016.

Media related to JS Seiryū (SS-509) at Wikimedia Commons