Japan Maritime Self-Defense Force ๐Ÿ‡ฏ๐Ÿ‡ต

Overview

The Japan Maritime Self-Defense Force (JMSDF), commonly referred to as the Japanese Navy, is a crucial component of Japan's Self-Defense Forces. Established after World War II and operating under constitutional limitations that restrict the use of force, the JMSDF is nonetheless a technologically advanced and highly capable naval force. Its primary missions include defending Japanese territorial waters, securing sea lines of communication, and contributing to international peacekeeping efforts.

The JMSDF's fleet is modern and diverse, featuring a range of destroyers, submarines, patrol vessels, and support ships. Among its most potent surface combatants are the Atago-class and Kongo-class guided-missile destroyers, equipped with the Aegis combat system. These ships offer robust anti-air, anti-surface, and anti-submarine capabilities. The Izumo-class "helicopter destroyers," which are essentially small aircraft carriers, reflect Japan's move towards more flexible power-projection capabilities, even though their primary role is anti-submarine warfare.

Submarines are an integral part of Japan's naval capabilities, offering a stealthy deterrent and reconnaissance platform. The Soryu-class submarines are among the most advanced diesel-electric submarines in the world, featuring air-independent propulsion (AIP) systems that allow extended underwater operations. These submarines are designed primarily for anti-ship and anti-submarine warfare.

Japan has also paid considerable attention to mine countermeasures, given the strategic importance of keeping its surrounding waters and critical shipping lanes open. The JMSDF operates specialized vessels for mine detection and clearance, underscoring the importance of this capability in its overall naval strategy.

One of the defining aspects of the JMSDF is its focus on indigenous technology. While Japan does import some foreign technology, the majority of its naval assets are domestically produced. Companies like Mitsubishi Heavy Industries and Kawasaki Shipbuilding Corporation are key players in this sector, designing and building state-of-the-art naval vessels.

Key facts

Official Name Japan Maritime Self-Defense Force
Country๐Ÿ‡ฏ๐Ÿ‡ต Japan
World rank#20
Ships in service154 (as of 2025)
Total ships154
Naval ensign

Ensign of Japan navy

Number of active ships by category

Ship category Active
Destroyers 46
Submarines 25
Other ships 25
Mine Warfare ships 22
Amphibious ships 16
Support ships 10
Patrol boats 6
Frigates 4

Detailed inventory of Japanese Navy

Amphibious ships

Type Class Ship Name Hull Number Status Year
Landing Craft Air Cushion 1-Go 6 units in service (6 ships) Active -
Landing Craft Mechanized YL-09 JS YL-11, JS YL-12, JS YL-13, JS YL-14, JS YL-15, JS YL-16, JS YL-17 (7 ships) Active -
Landing ship tank ลŒsumi JS ลŒsumi, JS Shimokita, JS Kunisaki (3 ships) Active -

Destroyers

Type Class Ship Name Hull Number Status Year
Destroyer escort Abukuma JS Abukuma, JS Jintsลซ, JS ลŒyodo, JS Sendai, JS Chikuma, JS Tone (6 ships) Active -
Destroyer Akizuki JS Akizuki, JS Teruzuki, JS Suzutsuki, JS Fuyuzuki (4 ships) Active -
Asagiri JS Asagiri, JS Yamagiri, JS Yลซgiri, JS Amagiri, JS Hamagiri, JS Setogiri, JS Sawagiri, JS Umigiri (8 ships) Active -
Asahi JS Asahi, JS Shiranui (2 ships) Active -
Guided missile destroyer Atago JS Atago, JS Ashigara (2 ships) Active -
Helicopter destroyer Hyลซga JS Hyลซga, JS Ise (2 ships) Active -
Izumo JS Izumo, JS Kaga (2 ships) Active -
Guided missile destroyer Kongล JS Kongล, JS Kirishima, JS Myลkล, JS Chลkai (4 ships) Active -
Maya JS Maya, JS Haguro (2 ships) Active -
Destroyer Murasame JS Murasame, JS Harusame, JS Yลซdachi, JS Kirisame, JS Inazuma, JS Samidare, JS Ikazuchi, JS Akebono, JS Ariake (9 ships) Active -
Takanami JS Takanami, JS Onami, JS Makinami, JS Sazanami, JS Suzunami (5 ships) Active -

Frigates

Type Class Ship Name Hull Number Status Year
Frigate Mogami JS Mogami, JS Kumano, JS Noshiro, JS Mikuma (4 ships) Active -

Mine Warfare ships

Type Class Ship Name Hull Number Status Year
Minesweeper Awaji JS Awaji, JS Hirado, JS Etajima (3 ships) Active -
Enoshima JS Enoshima, JS Chichijima, JS Hatsushima (3 ships) Active -
Hirashima JS Hirashima, JS Yakushima, JS Takashima (3 ships) Active -
Sugashima JS Sugashima, JS Tsunoshima, JS Naoshima, JS Toyoshima, JS Ukushima, JS Izushima, JS Aishima, JS Aoshima, JS Miyajima, JS Shishijima, JS Kuroshima (11 ships) Active -
Uraga JS Uraga, JS Bungo (2 ships) Active -

Other ships

Type Class Ship Name Hull Number Status Year
Cable laying ship - JS Muroto Active -
Experiment ship - JS Asuka Active -
Ice breaker - JS Shirase Active -
Oceanographic research ship - JS Nichinan Active -
- JS Shลnan Active -
Submarine rescue vessel - JS Chihaya Active -
- JS Chiyoda Active -
Yacht - JS Hashidate Active -
Oceanographic research ship Futami JS Wakasa Active -
Training vessel Hatakaze JS Hatakaze, JS Shimakaze (2 ships) Active -
Ocean surveillance ship Hibiki JS Hibiki, JS Harima, JS Aki (3 ships) Active -
Training support ship Hiuchi JS Hiuchi, JS Suo, JS Amakusa, JS Genkai, JS Enshu (5 ships) Active -
Cadet training ship Kashima JS Kashima Active -
Training support ship Kurobe JS Kurobe Active -
Utility landing craft LCU-2001 JS LC No.2 Active -
Training support ship Tenryลซ JS Tenryลซ Active -
Yard oiler tanker YOT-01 JS YOT-01, JS YOT-02 (2 ships) Active -

Patrol boats

Type Class Ship Name Hull Number Status Year
Patrol boat Hayabusa JS Hayabusa, JS Wakataka, JS Otaka, JS Kumataka, JS Umitaka, JS Shirataka (6 ships) Active -

Submarines

Type Class Ship Name Hull Number Status Year
Attack submarine Oyashio JS Uzushio, JS Makishio, JS Isoshio, JS Narushio, JS Kuroshio, JS Takashio, JS Yaeshio, JS Setoshio, JS Mochishio (9 ships) Active -
Training submarine Oyashio JS Oyashio, JS Michishio (2 ships) Active -
Attack submarine Sลryลซ JS Sลryลซ, JS Unryลซ, JS Hakuryลซ, JS Kenryลซ, JS Zuiryลซ, JS Kokuryลซ, JS Jinryลซ, JS Sekiryลซ, JS Seiryลซ, JS Shลryลซ, JS ลŒryลซ, JS Tลryลซ (12 ships) Active -
Taigei JS Taigei, JS Hakugei (2 ships) Active -

Support ships

Type Class Ship Name Hull Number Status Year
Replenishment oiler Mashลซ JS Mashลซ, JS ลŒmi (2 ships) Active -
Towada JS Hamana, JS Tokiwa, JS Towada (3 ships) Active -
Diving support vessel YDT-01 JS YDT-01, JS YDT-02, JS YDT-03, JS YDT-05, JS YDT-06 (5 ships) Active -
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