Hakuryū (SS-503) visits Pearl Harbor, Feb 2013
|Builders:||Mitsubishi Heavy Industries
Kawasaki Shipbuilding Corporation
|Operators:||Japan Maritime Self-Defense Force|
|Preceded by:||Oyashio-class submarine|
|Active:||6 (1 launched)|
|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:||6,100 nm @ 6.5 knots|
|Complement:||65 (9 officers, 56 enlisted)|
|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
|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 for:
1.) Type 89 torpedoes
2.) Harpoon (missile)
The Sōryū-class submarines (16SS) are diesel-electric attack submarines that entered service with the Japan Maritime Self-Defense Force in 2009. The design is an evolution of the Oyashio-class submarine, from which it can most easily be distinguished by its X-shaped tail planes. The Sōryūs have the largest displacement of any submarine used by post-war Japan.
The class are fitted with air-independent propulsion based on Kockums stirling engines license-built by Kawasaki Heavy Industries, allowing them to stay submerged for longer periods of time. Some recent informations suggest that the last units in the series will have their air independent propulsion systems replaced with banks of Li-Ion batteries.
The cost of the sixth submarine (Kokuryū) was estimated at 540 million USD.
Japanese submarines since World War II were named after ocean currents. The JMSDF changed its naming convention with the Sōryū, and submarines will now be named after mythological creatures. Sōryū (そうりゅう) means blue (or green) dragon in Japanese and is named after the World War II carrier Sōryū, which was sunk during the Battle of Midway.
Japan may offer Sōryū-class submarines to Australia to replace the Royal Australian Navy's Collins-class submarines as part of the Collins-class submarine replacement project. On 9 April 2014, Australian Defence Minister David Johnston, while discussing Australia's future submarine options, described the Sōryū class as "extremely impressive". India too has approached Japan and expressed interest to buy Sōryū-class submarines. During a visit of Defence Minister Manohar Parikkar to Japan he asked Japanese government to participate in the multi-billion dollar Project-75I submarine project.
|Project no.||Building no.||Pennant no.||Name/namesake||Laid down||Launched||Commissioned||Home port|
|S131||8116||SS-501||Sōryū (そうりゅう?) / Blue Dragon||31 March 2005||5 December 2007||30 March 2009||Kure|
|S131||8117||SS-502||Unryū (うんりゅう?) / Cloud Dragon||31 March 2006||15 October 2008||25 March 2010||Kure|
|8118||SS-503||Hakuryū (はくりゅう?) / White Dragon||6 February 2007||16 October 2009||14 March 2011||Kure|
|8119||SS-504||Kenryū (けんりゅう?) / Sword Dragon, Stegosauria||31 March 2008||15 November 2010||16 March 2012||Kure|
|8120||SS-505||Zuiryū (ずいりゅう?) / Auspicious Dragon||16 March 2009||20 October 2011||6 March 2013||Yokosuka|
|8121||SS-506||Kokuryū (こくりゅう?) / Black Dragon||21 January 2011||31 October 2013||9 March 2015||Yokosuka|
|S131||8122||SS-507||Jinryū (じんりゅう?) / Benevolent Dragon||14 February 2012||8 October 2014||(March 2016)||?|
|S131||8123||SS-508||?||15 March 2013||(2015)||(March 2017)||?|
- SS-501 Soryu Specifications - Globalsecurity.org
- "First Improved Oyashio-class boat takes to the water". Jane's Information Group. 2007-12-06. Retrieved 2007-12-09.
- "Japan launches newest submarine Kokuryu amid party atmosphere". The Japan Daily Press. 2013-11-04. Retrieved 2013-12-14.
- 海上自衛隊訓令第３０号, Japan Maritime Self Defense Force
- "Japanese Media Now Openly Talking about Japan-Australia Soryu Deal."
- They are equipped with a new sonar ZQQ-7B.
- "Submarine Unryu Delivered". Kawasaki Heavy Industries, Ltd. 2010-03-25. Retrieved 2010-02-14.[dead link]
- They are equipped with a new satellite communication device.
- She is equipped with new torpedo counter measures.
- Japanese website with Diagram
- Website on the Imperial Japanese Navy: JMSDF vessels