List of active Japan Maritime Self-Defense Force ships

List of active ships of the Japan Maritime Self-Defense Force is a list of ships in active service with the Japan Maritime Self-Defense Force. The JMSDF is one of the world's largest navies and the second largest navy in Asia in terms of fleet tonnage.^[1] As of 2022, the JMSDF operates a total of 155 vessels (including minor auxiliary vessels), including; four helicopter destroyers (or helicopter carriers), 36 destroyers, 10 small destroyers (or frigates), two frigates, six destroyer escorts (or corvettes), 22 attack submarines, 30 mine countermeasure vessels, six patrol vessels, three landing ship tanks, 8 training vessels and a fleet of various auxiliary ships.^[2][3]

JMSDF ensign of Japan.

As of 2013, a procurement list added to the current National Defense Program Guidelines (NDPG) has revealed that, among other things, an additional 48 escort vessels of various classes are planned to be added to the MSDF fleet in the 2020s.^[4] In addition, as of 7 July 2013, it was being reported that plans were under way to procure two more Aegis equipped destroyers in order to bolster ongoing BMD efforts, the first to be contracted for in fiscal year 2015 and the other in fiscal year 2016.^[5]

Submarine fleet

Submarines

Class	Picture	Type	Boats	Displacement	Note
Submarines (22 in Service)
Taigei-class		Attack submarine	JS Taigei JS Hakugei	3,000 tonnes (surfaced)	The first submarine of this class, Taigei, was commissioned on March 9, 2022.^[6] JS Jingei launched but not completed, three additional boats not yet launched (October 2022).
Sōryū-class			JS Sōryū JS Unryū JS Hakuryū JS Kenryū JS Zuiryū JS Kokuryū JS Jinryū JS Sekiryū JS Seiryū JS Shōryū JS Ōryū JS Tōryū	2,900 tonnes (surfaced) 4,200 tonnes (submerged)	The JS Ōryū is the world's first submarine powered by lithium-ion batteries.^[7]
Oyashio-class			JS Uzushio JS Makishio JS Isoshio JS Narushio JS Kuroshio JS Takashio JS Yaeshio JS Setoshio JS Mochishio	2,750 tonnes (surfaced) 4,000 tonnes (submerged)	2 of 11 built converted to training ships (see Training Vessels below).

Surface fleet

Helicopter destroyers (de facto helicopter carrier/light aircraft carrier) - DDH/CVL

Officially classed as "helicopter destroyers", these vessels have a full-length flight deck helicopter carrier configuration

Class	Picture	Type	Ships	Displacement	Note
Helicopter destroyers - DDH (de facto light aircraft carrier) (2 in Service)
Izumo-class		Helicopter destroyer	JS Izumo JS Kaga	27,000 tonnes	Converting into light aircraft carrier configuration to carry F-35B V/STOL fighters from the mid-2020s.^[8]^[9]

Class	Picture	Type	Ships	Displacement	Note
Helicopter destroyers - DDH (de facto helicopter carrier) (2 in Service)
Hyūga-class		Helicopter destroyer	JS Hyūga JS Ise	19,000 tonnes

Landing ships

Class	Picture	Type	Ships	Displacement	Note
Landing ships - LST (3 in Service)
Ōsumi-class		Landing ship tank (de facto Amphibious transport dock)	JS Ōsumi JS Shimokita JS Kunisaki	14,000 tonnes	Class modestly upgraded to land Boeing MV-22s and carry the AAV7A1 Amphibious Assault Vehicles.^[10]^[11]^[12]
Landing craft - LCU (9 in Service)
LCU-2001-class		Utility landing craft	JS LC No.2	540 tonnes
YL-09-class		landing craft mechanized	JS YL-11 JS YL-12 JS YL-13 JS YL-14 JS YL-15 JS YL-16 JS YL-17	50 tonnes
Landing craft - LCAC (6 in Service)
1-Go-class		Landing Craft Air Cushion	6 units in service	182 tonnes	^[13]

Destroyers - DDG/DD

The JMSDF uses the official term Destroyers despite some larger ships being analogous to cruisers and smaller vessels being analogous to frigates by most international classifications.^[14]

Class	Picture	Type	Ships	Displacement	Note
Destroyers - DDG/DD (36 in Service)
Maya-class		Guided missile destroyer (Aegis)	JS Maya JS Haguro	10,500 tonnes
Atago-class			JS Atago JS Ashigara	10,000 tonnes
Kongō-class			JS Kongō JS Kirishima JS Myōkō JS Chōkai	9,500 tonnes
Asahi-class		Destroyer	JS Asahi JS Shiranui	6,800 tonnes
Akizuki-class			JS Akizuki JS Teruzuki JS Suzutsuki JS Fuyuzuki	6,800 tonnes
Takanami-class			JS Takanami JS Onami JS Makinami JS Sazanami JS Suzunami	6,400 tonnes
Murasame-class			JS Murasame JS Harusame JS Yūdachi JS Kirisame JS Inazuma JS Samidare JS Ikazuchi JS Akebono JS Ariake	6,200 tonnes
Asagiri-class			JS Asagiri JS Yamagiri JS Yūgiri JS Amagiri JS Hamagiri JS Setogiri JS Sawagiri JS Umigiri	5,200 tonnes

Frigate Multi-Purpose/Mine - FFM

Class	Picture	Type	Ships	Displacement	Note
Frigate Multi-Purpose/Mine - FFM (4 in Service)
Mogami-class		Frigate	JS Mogami JS Kumano JS Noshiro JS Mikuma	5,500 tonnes	JS Yahagi, JS Agano, and JS Niyodo are launched, but still being fitted out. Originally, a total of 22 ships to this design are planned by 2032, but according to a new plan published by ATLA,^[15] the Mogami class will be completed with 12 ships up to FY Reiwa 5 plan. The rest are to be continued with a new FFM design.

Destroyer escorts - DE

Class	Picture	Type	Ships	Displacement	Note
Destroyer escorts - DE (6 in Service)
Abukuma-class		Destroyer escort (or frigate)	JS Abukuma JS Jintsū JS Ōyodo JS Sendai JS Chikuma JS Tone	2,550 tonnes

Mine countermeasure vessels

Class	Picture	Type	Ships	Displacement	Note
Mine countermeasure vessels (22 in Service)
Uraga-class		Minesweeper	JS Uraga JS Bungo	6,850 tonnes	Categorized as "mine-countermeasures support ship".
Awaji-class			JS Awaji JS Hirado JS Etajima	690 tonnes
Enoshima-class			JS Enoshima JS Chichijima JS Hatsushima	570 tonnes
Hirashima-class			JS Hirashima JS Yakushima JS Takashima	570 tonnes
Sugashima-class			JS Sugashima JS Tsunoshima JS Naoshima JS Toyoshima JS Ukushima JS Izushima JS Aishima JS Aoshima JS Miyajima JS Shishijima JS Kuroshima	570 tonnes

Patrol vessels

Class	Picture	Type	Ships	Displacement	Note
Patrol vessels (6 in Service)
Hayabusa-class		Patrol boat	JS Hayabusa JS Wakataka JS Otaka JS Kumataka JS Umitaka JS Shirataka	240 tonnes

Training vessels

Class	Picture	Type	Ships	Displacement	Note
Training vessels (7 in Service)
Kashima-class		Cadet training ship	JS Kashima	4,050 tonnes
Hatakaze-class		Training vessel	JS Hatakaze JS Shimakaze	5,900 tonnes	Converted Hatakaze-class guided missile destroyer.
Oyashio-class		Training submarine	JS Oyashio JS Michishio	4,000 tonnes	Reconverted Oyashio-class submarines.
Kurobe-class		Training support ship	JS Kurobe
Tenryū-class			JS Tenryū

Auxiliary fleet

Replenishment ships

Class	Picture	Type	Ships	Displacement	Note
Replenishment ships (5 in Service)
Mashū-class		Replenishment oiler	JS Mashū JS Ōmi	25,000 tonnes
Towada-class			JS Hamana JS Tokiwa JS Towada	15,000 tonnes

Miscellaneous

Class	Picture	Type	Ships	Displacement	Note
Miscellaneous (17 in Service)
Hiuchi-class		Training support ship	JS Hiuchi JS Suo JS Amakusa JS Genkai JS Enshu	1,000 tonnes
		Cable laying ship	JS Muroto
		Submarine rescue vessel	JS Chiyoda	5,600 tonnes (standard)	JMSDF commissions new submarine rescue ship^[16]
			JS Chihaya	6,900 tonnes
Futami-class		Oceanographic research ship	JS Wakasa
			JS Nichinan
			JS Shōnan
Hibiki-class		Ocean surveillance ship	JS Hibiki JS Harima JS Aki^[17]
		Experiment ship	JS Asuka
		Ice breaker	JS Shirase	20,000 tonnes
		Yacht	JS Hashidate
YDT-01-class		Diving support vessel	JS YDT-01 JS YDT-02 JS YDT-03 JS YDT-05 JS YDT-06
YOT-01-class		Yard oiler tanker	JS YOT-01 JS YOT-02	4,900 tonnes

Future JMSDF vessels

 

29SS-type submarine Taigei launch

 

30DX-type frigate Mogami launch

 

Japanese BMD map

 

Aegis system equipped ships (ASEV)

Authorized projects

Authorized projects for the Japanese Maritime Self-Defense Force include the ongoing construction of an improved AIP-type non-nuclear attack submarine class, the recapitalization of the JMSDF's frigate fleet units, and the acquisition of a pair of JMSDF-owned oil tankers and up to four amphibious tansports, as well as the pending construction of a dozen next-generation offshore patrol vessels (OPV) and two "Aegis system equipped ships" (ASEV) to provide dedicated sea-based ballistic missile defense (BMD) coverage of the Japanese home islands to replace the cancelled Aegis Ashore land-based BMD system.

29SS submarines

Main article: Taigei-class submarine

This submarine class has a non-nuclear air-independent propulsion (AIP) propulsion plant using improved lithium-ion batteries for enhanced silencing and operational flexibility. These submarines will also have improved sonar and weapons systems. The lead ship Taigei will serve as a test bed for the rest of the class, allowing more rapid technical upgrades to the other submarines within this class.^[18][19]

30FFM frigates

Main article: Mogami-class frigate

In August 2017, the Acquisition, Technology & Logistics Agency (ATLA) selected Mitsubishi Heavy Industries (MHI) and Mitsui Engineering and Shipbuilding (MES) as the prime contractor and subcontractor to construct the frigate. In addition, the agency also selected a completely new design of the vessel (30DX). The new ship class is set to replace the Asagiri-class destroyers and Abukuma-class destroyer escorts.^[20]

Amphibious transport vessels

See also: General Frank S. Besson-class support vessel

At a press conference held on February 16, 2021, Defense Minister Nobuo Kishi announced that the Japan Self-Defense Force (JSDF) established a joint amphibious unit equipped with three new transport ships by 2024. These units will consist of one medium-sized Logistics Support Vessels (LSV) capable of carrying about 1,700 long tons (1,700 t) of cargo and three smaller Landing Craft Utility (LCUs) vessels with each capable of carrying 350 long tons (360 t) of cargo and operating in shallow waters. Although the Japan Maritime Self-Defense Force (JMSDF) has been basically responsible for the operation of the vessels, these vessels will be operated by a joint unit as the focus is on supporting the Japan Ground Self-Defense Force (JGSDF) and other forces operating in remote Southwest Islands, including Okinawa.^{[21] [22]} The JSDF activated Japan's first marine unit since World War II on April 7, 2018, and the marines of the Amphibious Rapid Deployment Brigade (ARDB) are trained to counter invaders from occupying Japanese islands along the edge of the East China Sea.^[23]

Next-generation offshore patrol vessels (OPV)

Main article: Next-Generation Offshore Patrol Vessel (OPV) program

On 30 June 2022, the Japan Ministry of Defense (MOD) announced the construction of 12 offshore patrol vessels (OPV) (pictured) for the Japanese Maritime Self-Defense Force (JMSDF) at a cost of ¥ 9 billion ($66 million USD) per ship. Japan Marine United Corporation (JMU) is the prime contractor for this program with Mitsubishi Heavy Industries (MHI) chosen to be the subcontractor. Both JMU and MHI as well as Mitsui Engineering & Shipbuilding had submitted preliminary designs for the proposed next-generation OPVs.^[24][25]

Aegis system equipped ships (ASEV)

Main article: Aegis system equipped vessels (ASEV)

In 2020, Japanese Defense Minister Nobuo Kishi announced plans to build 2 new Aegis destroyers (pictured) to replace its scrapped land-based Aegis Ashore ballistic missile interceptors program.^[26] On August 31, 2022, the Japan Ministry of Defense announced that JMSDF will operate two "Aegis system equipped ships" (イージス・システム搭載艦 in Japanese) to replace its earlier cancellation of the Aegis Ashore program, commissioning one ship by the end of fiscal year 2027, and the other by the end of FY2028. The budget for design and other related expenses are to be submitted in the form of “item requests”, without specific amounts, and the initial procurement of the lead items are expected to clear legislation by FY2023. Construction is to begin in the following year of FY2024.^{[27][28][29][30]}

Proposed projects

See also: Territorial disputes of Japan

 

Exclusive economic zone of Japan. Disputed areas are marked in lighter color.

Given the various maritime-related territorial disputes and expanding operational requirements (pictured), the Japanese Maritime Self-Defense (JMSDF) has shown increased interest in augmenting its amphibious lift and expeditionary capabilities. Consequently, several Japanese defense firms such as Japan Marine United Corporation (JMU) and Mitsui Engineering & Shipbuilding (MES) have proposed amphibious warfare options at such industry trade shows as the Maritime Air Systems & Technologies (MAST) and Defence and Security Equipment International (DSEI) exhibits. Also, on March 4, 2014, Japan and the United States announced a bilateral research project on a LCS-style warship pursuant to the Mutual Defense Assistance Act.^[31]

Amphibious assault ships (LHD)

See also: Amphibious assault ship

In 2014, Japanese Defense Minister Itsunori Onodera expressed the intention of buying one amphibious assault ship (LHD) from the United States to provide more amphibious capabilities than the current Osumi class landing ships. The Wasp-class amphibious assault ship is most likely candidate for acquisition.^[32]

JMU design concept

During the annual Defence and Security Equipment International (DSEI) tradeshow held 18–19 November 2019 in Chiba, Japan, the Japan Marine United Corporation (JMU) unveiled its proposed design for a big-deck multi-purpose LHD-type amphibious assault ship for the Japan Maritime Self-Defense Force. The vessel’s design features a floodable well deck for embarking two LCAC air-cushion landing craft plus 20 AAV7A1 amphibious assault vehicles. Its full-length flight deck boasts five marked landing spots for helicopters or MV-22B tiltrotors. Two below-deck hangars have space for five more rotorcraft. The vessel has a 500-person crew and an embarked unit of 500 marines. The JMU concept art displayed three RIM-116 Rolling Airframe Missile (RAM) SeaRAM launchers located before and aft of the ship's island superstructure, as well as a Mk 15 Phalanx 20mm-Vulcan cannon-armed Close-in Weapon System (CIWS) on the forward deck.^[33][34][35]

The JMU's proposed LHD vessel's displacement is approximately 20,000 long tons (20,000 t) with an overall length of 720 ft (220 m), a beam of 124 ft (38 m), a draft of 26.25 ft (8.00 m), and a top speed of 24 knots (44 km/h; 28 mph).^[34][35] Overall, the proposed JMSDF amphibious assault ship is substantially smaller than China's Type 075 vessels, South Korea's proposed LPH-II design, the U.S. Navy's Wasp-class amphibious assault ship, and Italian Navy's Trieste, and is more comparable to the Mistral-class amphibious assault ship of the French or the Egyptian navies.^[34] A JMU representative told Jane's 360 that while the Japan Maritime Self-Defense Force did not have a current requirement for an LHD-type amphibious assault ship of any kind to join the JMSDF's Self Defense Fleet, the Japan Marine United Corporation still expected the JMSDF to eventually issue such a requirement in the near future, with the JMU design as an alternative to a foreign design.^[34]

MES design concept

At the Maritime Air Systems & Technologies (MAST) 2017 naval defense exhibition held in Tokyo, Mitsui Engineering & Shipbuilding (MES) unveiled a new LHD-type amphibious assault ship for the Japan Maritime Self-Defense Force. MES drew on its experience from constructing and delivering the Osumi and Shimokita tank landing ships (LSTs) to the JMSDF when designing the new LHD. According to Mistui spokesmen, the main missions of the proposed LHD vessel is island defense as well as humanitarian assistance/disaster relief (HA/DR) operations, with the Japan Maritime Self-Defense Force (JMSDF) is reportedly looking to boost its amphibious capabilities in order to protect its Southern Islands.^[36]

Mitsui's proposed LHD vessel is designed for large-scale transportation of Landing Craft Air Cushion (LCAC) hovercraft, main battle tanks (MBTs), vehicles, cargo, and equipment, with multi-mission features. Its flight deck LHD has five helicopter spots and a hangar large enough to large helicopters such as the CH-47 Chinook tandem rotor heavy-lift helicopters. Its well deck is large enough to accommodate two LCACs, and it can store at least 24 assault amphibious vehicles (AAVs) on two decks.^[36]

The Mitsui LHD concept measures 210 m (689 ft 0 in) in length, 35 m (114 ft 10 in) in width, and draws 7 m (23 ft 0 in) with displacement of 16,000 long tons (16,000 t) and a speed of 22 kn (25 mph; 41 km/h). The maximum complement of the vessel is 200 people including embarked troops. Mitsui's LHD is fitted with a forward Phalanx CIWS gun mount and a SeaRAM launcher at the stern. There are two shafts and two rudders, plus two bow thrusters. There is a main elevator for helicopters aft and a smaller one for stores and equipment forward near the island superstructure. Overall, the Mitsui LHD concept to the French Navy's Mistral-class LHDs.^[36]

Amphibious transport dock (LPD)

See also: Type 071 amphibious transport dock, Albion-class landing platform dock, and San Antonio-class amphibious transport dock

At the Maritime Air Systems & Technologies (MAST) 2017 naval defense exhibition held in Tokyo, Mitsui Engineering & Shipbuilding (MES) unveiled a new amphibious transport dock (LPD) concept. According to Mistui spokesmen, the main missions of the proposed LPD vessel is island defense as well as humanitarian assistance/disaster relief (HA/DR) operations, with the Japan Maritime Self-Defense Force (JMSDF) is reportedly looking to boost its amphibious capabilities in order to protect its Southern Islands.^[37]

The proposed MES LPD design concept has an aft flight deck with two helicopter spots and a hangar large enough to receive two V-22 Osprey tilt-rotor aircraft and a small size VTOL unmanned aerial vehicle (UAV) similar in size to the MQ-8B Fire Scout. Beneath the flight deck is a well deck large enough to accommodate two Landing Craft Air Cushion (LCAC) hovercraft. Up to 40 AAV, MBT, and APC vehicles can be carried on two lower decks within the ship. The proposed ship measures 210 m (689 ft 0 in) in length, 30 m (98 ft 5 in) in width, and a draft of 7 m (23 ft 0 in) with a displacement of 16,000 long tons (16,000 t) and a speed of 22 kn (25 mph; 41 km/h). The maximum complement of the vessel is 200 people, including embarked troops. The LPD is fitted with a forward Phalanx CIWS gun mount and a SeaRAM launcher on top of the helicopter hangar. The vessel has two shafts and two rudders, as well as two bow thrusters, and also features two retractable fin stabilizers.^[37]

Mobile landing platform (MLP)

See also: Expeditionary Transfer Dock

At the Maritime Air Systems & Technologies (MAST) 2017 naval defense exhibition held in Tokyo, Mitsui Engineering & Shipbuilding (MES) unveiled its Mobile Landing Platform (MLP) concept designed for large scale transportation of Landing Craft Air Cushion (LCAC) hovercraft, main battle tanks (MBTs), vehicles, cargo, and other equipment, with multi-mission and modular features. In addition to its aviation operations and amphibious capabilities, this MLP can act as an offshore base. The Japan Maritime Self-Defense Force is reportedly looking to boost its amphibious capabilities in order to protect its Southern Islands.^[38]

The MES's overall MLP design combines the aviation facilities of the U.S. Navy's Lewis B. Puller-class expeditionary mobile base ships with the extensive amphibious and expeditionary capabilities of the Montford Point-class expeditionary transfer dock vessels. There are four helicopter spots on the flight deck, but no helicopter hanger, with an elevator for stores and equipment next to spot #2. There is also a ramp allowing vehicles access between the two main decks. The MES mobile landing platform concept measures 240 m (787 ft 5 in) in length, 39 m (127 ft 11 in) in width, and a draft of 7 m (23 ft 0 in). The ship's displacement is 21,000 long tons (21,000 t), a speed of 15 kn (17 mph; 28 km/h), and a maximum complement of 240 people.^[38]

33DD destroyers

Main article: 33DD destroyer

The 33DD (also known as DDR or Destroyer Revolution) was a Japanese destroyer proposed for the Japan Maritime Self-Defense Force. The tentative name of the class, 33 DD, is derived from an estimate that it would be budgeted in the Japanese era of Heisei 33 (2021).^[39][40]

High Speed Multi-hull Vessel Optimization (HSMVO)

Main article: Future Multi Purpose Trimaran concept

 

HSMVO artist concept

The joint HSMVO research is conducted by the Acquisition, Technology & Logistics Agency (ATLA) and the Naval Surface Warfare Center Carderock Division of the US Navy.^[41][42] Also known as the Future Multi Purpose Trimaran concept, the HSMVO design concept is based on the Independence-class littoral combat ship with its distinctive trimaran hull design, modular mission capabilities, and aluminum construction (pictured). The mission capabilities of the concept includes mine countermeasure (MCM), humanitarian assistance and disaster recover (HADR), and offshore patrol/special ops. Likewise, each configuration will consist of different weapons, equipment, and supplies.^[42]

ATLA unveiled the HSMVO trimaran warship concept model at the Japanese defense trade-show MAST Asia 2017. According to Navy Recognition website, the project is set to end in 2018 and the JMSDF would ultimately decide whether to adopt the concept for development or not.^[42] To date, no decision has been made regarding the future acquisition and construction of warships based on the HSMVO design concept.

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External links

• "Defense Programs and Budget of Japan FY Reiwa 5 (2023) Budget Overview" (PDF). Budget overview. Japanese Ministry of Defense. 23 December 2022. Retrieved 9 January 2023. Japanese
• "Budget for Fundamental Strengthening of Defense Capabilities FY Reiwa 5 (2023) Budget Overview" (PDF). Budget overview. Japanese Ministry of Defense. 23 December 2022. Retrieved 9 January 2023. Japanese
• Website on the Imperial Japanese Navy: JMSDF vessels

Bibliography

• IISS (2010). Military Balance 2010. Routledge, London. ISBN 978-1857435573.