JS Oyashio
History
Japan
Name	Oyashio (おやしお)
Namesake	Oyashio
Ordered	1993
Builder	Kawasaki, Kobe
Cost	¥52.19 million
Laid down	26 January 1994
Launched	15 October 1996
Commissioned	16 March 1998
Decommissioned	17 March 2023
Reclassified	TSS-3608, 6 March 2015
Homeport	Kure, Hiroshima
Identification	Pennant number: TSS-3608
Status	Decommissioned
General characteristics
Class and type	Oyashio-class submarine
Displacement	2,750 tonnes (surfaced) 4,000 tonnes (submerged)
Length	81.7 m (268 ft 1 in)
Beam	8.9 m (29 ft 2 in)
Draught	7.4 m (24 ft 3 in)
Propulsion	Diesel-electric 2 Kawasaki 12V25S diesel engines 2 Kawasaki alternators 2 Toshiba motors 3,400 hp (2,500 kW) surfaced 7,750 hp (5,780 kW) submerged
Speed	12 knots (22 km/h; 14 mph) (surfaced) 20 knots (37 km/h; 23 mph) (submerged)
Complement	70 (10 officers)
Sensors and processing systems	Sonar: Hughes/Oki ZQQ-6 hull-mounted sonar, flank arrays, 1 towed array Radar: JRC ZPS 6 I-band search radar.
Armament	6 × HU-605 21 in (533 mm) torpedo tubes with 20 reloads for: 1.) Type 89 torpedo 2.) UGM-84 Harpoon

JS Oyashio (SS-590) was the lead boat of the Oyashio-class submarines. She was commissioned on 16 March 1998.

Oyashio was laid down at Kawasaki Heavy Industries Kobe Shipyard on 26 January 1994 and launched on 15 October 1996. She was commissioned on 16 March 1998 and deployed to Yokosuka.^[1]

From 11 January to 10 April 2006, she participated in RIMPAC 2006.^{[citation needed]}

On 10 January 2009, during a performance test 4.6 kilometres (2.9 mi) Southwest of the Maritime Self-Defense Force Kagoshima Laboratory in Kirishima City, Kagoshima Prefecture, the Maritime Self-Defense Force's fishing boat 28th Kamemaru came into contact with the mast. A part of the stern of the fishing boat was damaged and dropped, but no one was injured. The fishing boat was chartered by the Maritime Self-Defense Force and was wary of other vessels from approaching during the performance test of Oyashio.^[2]

On 8 December 2009, the Kagoshima Maritime Security Department sent documents to the Captain and three others on suspicion of the risk of a possible traffic incident. Furthermore, at around 0:15 pm on 17 June 2009, during training on the Pacific Ocean about 28 kilometres (17 mi) East of Shiriyazaki, a cable for resource exploration (4.8 km) towed by the Agency for Natural Resources and Energy research vessel Shigen [ja] (10,395 tons) of the Ministry of Economy, Trade and Industry caused an incident that left some of the crew injured.^{[This paragraph needs citation(s)]}

On 6 March 2015, due to the removal of the training submarine Fuyushio, Oyashio's designation was changed to a training submarine on the same date, and the first training submarine under the direct control of the submarine fleet. After joining the corps, the submarine's fixed port was transferred to Kure.^[3]

From 19 March to 27 April 2016, she participated in the open sea practice voyage (flight) with the escort vessels JS Ariake and JS Setogiri. On 3 April, she entered Subic Bay on Luzon Island, Philippines, facing the South China Sea.^[4]

At around 6:20 a.m. on 10 March 2022, while drifting at sea about 1.1 kilometers South-Southeast of the Kobe Wadamisaki Breakwater Lighthouse in Hyogo Ward, Kobe City, Oyashio collided with the fishing trawler Sumiyoshi Maru, which was sailing underway. There was no significant damage to either vessel, and no injuries.^[5]

Oyashio was decommissioned on 17 March 2023 at Kure.^[6] She had been in service for 25 years, the longest period attained by any MSDF submarine, and she had travelled 500,000 kilometres (310,000 miles) in distance.^[7]

Media related to JS Oyashio (SS-590) at Wikimedia Commons