List of Japanese Navy ships and war vessels in World War II

This List of Japanese Naval ships and war vessels in World War II is a list of seafaring vessels of the Imperial Japanese Navy of World War II. It includes submarines, battleships, oilers, minelayers and other types of Japanese sea vessels of war and naval ships used during wartime.

Aircraft carriers

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Heavy/Fleet carriers

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Fleet Carrier (11)
Class Picture Type Ships (Years in Service) Displacement Note
Akagi-class   Fleet carrier Akagi (1927–1942) 36,500 tonnes Converted from an Amagi-class battlecruiser. Sunk at Midway on June 5, 1942
Kaga-class   Aircraft carrier Kaga (1928–1942) 38,200 tonnes Converted from a Tosa-class battleship. Sunk at Midway on June 4, 1942
Sōryū-class   Aircraft carrier Sōryū (1937–1942)
Hiryū (1939–1942)
16,200 tonnes Hiryū is often considered to be a separated class. Sunk at Midway on June 5, 1942,

Soryu took part in the attack on Pearl Harbor, the Battle of Wake Island, and supported the conquest of the Dutch East Indies. She was sunk at Midway on June 4, 1942

Shōkaku-class   Aircraft carrier Shōkaku (1941–1944)
Zuikaku (1941–1944)
25,675 tonnes With the exception of the Battle of Midway, Shōkaku and Zuikaku participated in every major naval action of the Pacific War, including the attack on Pearl Harbor, the Indian Ocean Raid, the Battle of the Coral Sea, and the Guadalcanal Campaign. Both carriers were sunk during the 1944 Pacific campaigns.
Unryū-class   Aircraft carrier Unryū (1944–1944)
Amagi (1944–1945)
Katsuragi (1944–1945)
17,480 tonnes The design for these ships was based on the aircraft carrier Hiryū. IJN Planned to build 16 ships, however only 3 were completed and 2 almost completed (one of which was sunk as a target then salvaged and later scrapped) before the project was abandoned in favour of Shinano's construction. Unryū was sunk by the USS Redfish, Amagi capsized after air attacks and Katsuragi was the only heavy carrier to survive the war
Taihō-class   Aircraft carrier Taihō (1944–1944) 30,250 tonnes A bit of a break from traditional Japanese carrier design, Taiho was a heavily armoured carrier expected to withstand multiple bombs and torpedo strikes. However, design faults and poor damage control allowed it to be sunk with one torpedo from the USS Albacore on June 19, 1944
Shinano-class   Aircraft carrier Shinano (1944–1944) 65,800 tonnes Initially laid down as the third of the Yamato-class battleships, Shinano was converted into an aircraft carrier due to the Japanese defeat at Midway. She was sunk on November 29, 1944, by torpedoes from USS Archerfish.

Light carriers

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Light Aircraft Carrier (9)
Class Picture Type Ships Displacement Note
Hōshō-class   Light aircraft carrier Hōshō (1922–1945) 7,470 tonnes First purpose-built carrier in the world. Scrapped 1946.
Ryūjō-class   Light aircraft carrier Ryūjō (1931–1942) 8,000 tonnes Sunk 1942.
Hiyō-class   Light aircraft carrier Hiyō (1942–1944)
Jun'yō (1942–1946)
24,150 tonnes Converted from an ocean liner in 1939. Hiyō sunk and Jun'yō scrapped 1946–1947.
Zuihō-class   Light aircraft carrier Zuihō (1940–1944)
Shōhō (1939–1942)
11,443 tonnes Both sunk during WWII.
Chitose-class   Light aircraft carrier Chitose (1938/1944–1944)
Chiyoda (1938/1944–1944)
11,200 tonnes Both ships were seaplane tenders before their conversion in 1943. Both ships sunk in 1944.
Ryūhō-class   Light aircraft carrier Ryūhō (1934/1942–1945) 16,700 tonnes Converted from the submarine tender Taigei 1941–1942. Recommissioned as Ryūhō 1942. Scrapped 1946.

Escort carriers

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Escort Carrier (10)
Class Picture Type Ships Displacement Note
Taiyō-class   Escort carrier Taiyō (1941–44)
Chūyō (1942–43)
Un'yō (1942–44)
17,830 tonnes All sunk.
Kaiyō-class   Escort carrier Kaiyō (1943–1945) 13,600 tonnes. Converted from ocean liner Argentina Maru. Scrapped 1946.
Shin'yō-class   Escort carrier Shin'yō (1943–1944) 17,500 tonnes Converted from the German liner SS Scharnhorst 1942.

Sunk 1944 by USS Spadefish.

Akitsu Maru-class   Escort carrier Akitsu Maru (1942–1944)
Nigitsu Maru (1942–1944)
11,800 tonnes Operated by the Imperial Japanese Army. Worlds' first Amphibious Assault ships.
Shimane Maru-class   Escort carrier Shimane Maru (1945–1945) 11,989 tonnes
Yamashio Maru-class   Escort carrier Yamashio Maru (1945–1945) 16,119 tonnes
Kumano Maru-class   Escort carrier Kumano Maru (1945–1945) 8,258 tonnes Operated by Imperial Japanese Army.

Seaplane tenders

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Seaplane Tender (9)
Class Picture Type Ships Displacement Note
Nisshin-class   Seaplane tender Nisshin (1942–1943) 11,499 tonnes Also midget submarine carrier and minelayer
Kamikawa Maru-class   Seaplane tender Kamikawa Maru (1937–1943)
Kiyokawa Maru (1941–1946)
Kimikawa Maru (1937–1944)
Kunikawa Maru (1937–1945)
6,862 tonnes Hirokawa Maru of the same class was converted to auxiliary (anti-aircraft) cruiser instead of seaplane tender when impressed for Navy service
Akitsushima-class   Seaplane tender Akitsushima (1942–1944) 4,725 tonnes
Kamoi-class   Seaplane tender Kamoi (1922–1947) 17,273 tonnes
Notoro-class   Seaplane tender Notoro (1934–1947) 15,647 tonnes Of 7 oilers in class, Notoro was converted to seaplane tender and Shiretoko to munition ship
Mizuho-class   Seaplane tender Mizuho (1939–1942) 10,930 tonnes Also midget submarine carrier

Armoured vessels

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Battlecruisers

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Fast Battleship (4) - former battlecruisers
Class Picture Type Ships in class Displacement Main battery Note
Kongō-class   Fast battleship Kongō (1913–1944)
Hiei (1914–1942)
Kirishima (1915–1942)
Haruna (1915–1945)
32,156 tonnes 8 × 14-inch Laid down and commissioned as Battlecruisers in early 20th century, remodelled into Battleships because of Washington Naval Treaty in the late 20' and into Fast Battleships in 1935, allowing them to accompany growing carrier force. All four were sunk during the war

Battleships

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Battleship (8)
Class Picture Type Ships Displacement Note
Fusō-class   Battleship Fusō (1915–1944)
Yamashiro (1917–1944)
29,330 tonnes There was a plan to convert these ships into Aviation Battleships in 1943. The plan was cancelled and the two Ise-class battleships were converted instead.
Ise-class   Battleship Ise (1917–1945)
Hyūga (1918–1945)
27,384 tonnes Converted into Aviation Battleship in 1943.
Nagato-class   Battleship Nagato (1920–1945)
Mutsu (1921–1943)
32,720 tonnes Both ships underwent significant modernization on 1934–1936, rebuilding the superstructure into the more familiar pagoda mast style.
Yamato-class   Battleship Yamato (1941–1945)
Musashi (1942–1944)
69,988 tonnes 5 planned, 1 converted into an Aircraft carrier, 2 cancelled. Yamato was sunk during a one-way trip to Okinawa during operation Ten-Go. She never saw action there and was sunk by aircraft on the way.

Heavy cruisers

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Heavy Cruiser (18)
Class Picture Type Ships Displacement Note
Furutaka-class   Heavy cruiser Furutaka (1926–1942)
Kako (1926–1942)
7,100 tonnes
Aoba-class   Heavy cruiser Aoba (1927–1945)
Kinugasa (1927–1942)
7,100 tonnes Variation of the Furutaka class
Myōkō-class   Heavy cruiser Myōkō (1929–1945)
Nachi (1928–1944)
Haguro (1929–1945)
Ashigara (1929–1945)
11,633 tonnes
Takao-class   Heavy cruiser Takao
Atago
Maya
Chōkai
11,633 tonnes Variation of the Myōkō class
Mogami-class   Heavy cruiser Mogami
Mikuma
Suzuya
Kumano
8,500 tonnes Suzuya and Kumano were considered to be a sub-class.
Mogami was considered to be an Aviation Cruiser by the IJN (1943).
Tone-class   Heavy cruiser Tone
Chikuma
11,213 tonnes Considered as Aviation Cruisers by IJN

Light cruisers

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Light Cruiser (26)
Class Picture Type Ships Displacement Note
Tenryū-class   Light cruiser Tenryū
Tatsuta
3,948 tonnes
Kuma-class   Light cruiser Kuma
Tama
Kitakami
Ōi
Kiso
5,500 tonnes Kitakami and Ōi later converted to a torpedo cruiser under a short-lived Imperial Japanese Navy program.
Kiso was also planned to be converted but no modifications took place.
Nagara-class   Light cruiser Nagara
Isuzu
Yura
Natori
Kinu
Abukuma
5,570 tonnes
Yūbari-class   Light cruiser Yūbari 2,890 t tonnes An experimental light cruiser.
Sendai-class   Light cruiser Sendai
Jintsu
Naka
5,195 tonnes 8 planned; 5 cancelled.
Katori-class   Light cruiser Katori
Kashima
Kashii
5,890 tonnes 4 planned; 1 cancelled.

Originally served as a training ship.

Agano-class   Light cruiser Agano
Noshiro
Yahagi
Sakawa
6,652 tonnes
Ōyodo-class   Light cruiser Ōyodo 8,164 tonnes 2 planned; 1 cancelled.
Yasoshima-class   Light cruiser Yasoshima
Ioshima
2,448 tonnes Served under the Republic of China Navy under the name of Ping Hai, until seized and re-floated in 1938 by IJN, having been sunk the year before.

Destroyers

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Destroyers

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Destroyer (169)
Class Picture Type Ships Displacement Note
Momi-class   Destroyer Momi | Kaya | Nashi | Take | Kaki | Tsuga | Nire | Kuri | Kiku | Aoi | Hagi | Fuji | Susuki | Hishi | Hasu | Warabi | Tade | Sumire | Tsuta | Ashi | Yomogi 850 tonnes 28 vessel planned 21 completed. 7 re-ordered as the new Wakatake-class. Relegated to mostly secondary roles.
Minekaze-class   Destroyer Minekaze | Sawakaze | Okikaze | Shimakaze | Nadakaze | Yakaze | Hakaze | Shiokaze | Akikaze | Yūkaze | Tachikaze | Hokaze | Nokaze | Namikaze | Numakaze 1,345 tonnes
Wakatake-class   Destroyer Wakatake | Kuretake | Sanae | Sawarabi | Asagao | Yūgao | Fuyō | Karukaya 900 tonnes 23 vessel planned 8 completed. Relegated to mostly secondary roles.
Kamikaze-class   Destroyer Kamikaze | Asakaze | Harukaze | Matsukaze | Hatakaze | Oite | Hayate | Asanagi | Yūnagi 1,400 tonnes
Mutsuki-class   Destroyer Mutsuki
Kisaragi
Yayoi
Uzuki
Satsuki
Minazuki
Fumizuki
Nagatsuki
Kikuzuki
Mikazuki
Mochizuki
Yūzuki
1,315 tonnes
Fubuki-class   Destroyer Fubuki
Shirayuki
Hatsuyuki
Miyuki
Murakumo
Shinonome
Usugumo
Shirakumo
Isonami
Uranami
1,750 tonnes
Ayanami-class   Destroyer Ayanami
Shikinami
Asagiri
Yūgiri
Amagiri
Sagiri
Oboro
Akebono
Sazanami
Ushio
1,750 tonnes Also known as Type II Fubuki-class.
Akatsuki-class   Destroyer Akatsuki
Hibiki
Ikazuchi
Inazuma
1,750 tonnes Also known as Type III Fubuki-class.
Hatsuharu-class   Destroyer Hatsuharu
Nenohi
Wakaba
Hatsushimo
Ariake
Yūgure
1,530 tonnes
Shiratsuyu-class   Destroyer Shiratsuyu
Shigure
Murasame
Yūdachi
Harusame
Samidare
Umikaze
Yamakaze
Kawakaze
Suzukaze
1,685 tonnes
Asashio-class   Destroyer Asashio | Ōshio | Michishio | Arashio | Natsugumo | Yamagumo | Minegumo | Asagumo | Arare | Kasumi 1,685 tonnes
Kagerō-class   Destroyer Kagerō | Shiranui | Kuroshio | Oyashio | Hayashio | Natsushio | Hatsukaze | Yukikaze | Amatsukaze | Tokitsukaze | Urakaze | Isokaze | Hamakaze | Tanikaze | Nowaki | Arashi | Hagikaze | Maikaze | Akigumo 2,000 tonnes Called Destroyer Type-A by IJN.
Yūgumo-class   Destroyer Yūgumo | Makigumo | Kazagumo | Naganami | Makinami | Takanami | Ōnami | Kiyonami | Tamanami | Suzunami | Fujinami | Hayanami | Hamanami | Okinami | Kishinami | Asashimo | Hayashimo | Akishimo | Kiyoshimo 2,077 tonnes Called Destroyer Type-A by IJN.
Akizuki-class   Destroyer Akizuki | Teruzuki | Suzutsuki | Hatsuzuki | Niizuki | Wakatsuki | Shimotsuki 2,700 tonnes
Fuyutsuki-class   Destroyer Fuyutsuki
Harutsuki
Yoizuki
Natsuzuki
2,700 tonnes Akizuki-subclass.
Michitsuki-class   Destroyer Hanazuki 2,700 tonnes 16 vessel planned however only 1 completed.
Akizuki-subclass.
Shimakaze-class   Destroyer Shimakaze 2,570 tonnes She was an experimental destroyer, with new high-temperature, high-pressure steam turbines and mounting a total of 15 torpedo tubes. Also called Type-C by IJN.
Matsu-class   Destroyer Matsu | Take | Ume | Momo | Kuwa | Kiri | Sugi | Maki | Momi | Kashi | Kaya | Nara | Sakura | Yanagi | Tsubaki | Hinoki | Kaede | Keyaki 1,260 tonnes
Tachibana-class   Destroyer Tachibana | Kaki | Kaba | Tsuta | Hagi | Sumire | Kusunoki | Hatsuzakura | Nire | Nashi | Shii | Enoki | Odake | Hatsuume 1,350 tonnes Matsu-subclass.

Torpedo boats

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Torpedo Boat (12)
Class Picture Type Boats Displacement Note
Chidori-class   Torpedo boat Chidori | Manazuru | Tomozuru | Hatsukari 600 tonnes 20 vessel planned however only 4 completed. 16 replaced by Ōtori-class.
Ōtori-class   Torpedo boat Ōtori | Hiyodori | Hayabusa | Kasasagi | Kiji | Kari | Sagi | Hato | 960 tonnes 16 vessel planned however only 8 completed.

Destroyer escorts (Kaibōkan)

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Kaibōkan (178)
Class Picture Type Boats Displacement Note
Shimushu-class   Kaibōkan Shimushu | Kunashiri | Ishigaki | Hachijo 874 tonnes
Etorofu-class   Kaibōkan Etorofu | Matsuwa | Sado | Oki | Mutsure | Iki | Tsushima | Wakamiya | Hirado | Fukae | Amakusa | Manju | Kanju | Kasado 884 tonnes
Mikura-class   Kaibōkan Mikura | Miyake | Awaji | Nomi | Kurahashi | Yashiro | Chiburi | Kusagaki 955 tonnes
Ukuru-class   Kaibōkan Ukuru | Hiburi | Shonan | Daito | Okinawa | Kume | Ikuna | Shinnan | Yaku | Aguni | Mokuto | Inagi | Uku | Chikubu | Habushi | Sakito | Kuga | Ojika | Kozu | Kanawa | Shiga | Amami | Hodaka | Habuto | Iwo | Takane | Ikara | Shisaka | Ikuno 955 tonnes Includes the 9 vessels of the Hiburi subclass
Type C-class   Kaibōkan CD-1 | CD-3 | CD-5 | CD-7 | CD-9 | CD-11 | CD-13 | CD-15 | CD-17 | CD-19 | CD-21 | CD-23 | CD-25 | CD-27 | CD-29 | CD-31 | CD-33 | CD-35 | CD-37 | CD-39 | CD-41 | CD-43 | CD-45 | CD-47 | CD-49 | CD-51 | CD-53 | CD-55 | CD-57 | CD-59 | CD-61 | CD-63 | CD-65 | CD-67 | CD-69 | CD-71 | CD-73 | CD-75 | CD-77 | CD-79 | CD-81 | CD-85 | CD-87 | CD-95 | CD-97 | CD-105 | CD-107 | CD-205 | CD-207 | CD-213 | CD-215 | CD-217 | CD-219 | CD-221 | CD-225 | CD-227 757 tonnes
Type D-class   Kaibōkan CD-2 | CD-4 | CD-6 | CD-10 | CD-12 | CD-14 | CD-16 | CD-18 | CD-20 | CD-22 | CD-24 | CD-26 | CD-28 | CD-30 | CD-32 | CD-34 | CD-36 | CD-38 | CD-40 | CD-42 | CD-44 | CD-46 | CD-48 | CD-50 | CD-52 | CD-54 | CD-56 | CD-58 | CD-60 | CD-64 | CD-66 | CD-68 | CD-70 | CD-72 | CD-74 | CD-76 | CD-78 | CD-80 | CD-82 | CD-84 | CD-102 | CD-104 | CD-106 | CD-112 | CD-116 | CD-118 | CD-124 | CD-126 | CD-130 | CD-132 | CD-134 | CD-138 | CD-142 | CD-144 | CD-150 | CD-154 | CD-156 | CD-158 | CD-160 | CD-186 | CD-190 | CD-192 | CD-194 | CD-196 | CD-198 | CD-200 | CD-202 | CD-204 752 tonnes

Patrol boats

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Patrol Boat
Class Picture Type Boats Displacement Note
No.1-class auxiliary patrol boat   Patrol boat PBa-1 | PBa-2 | PBa-3 | PBa-25 | PBa-26 | PBa-31 | PBa-37 | PBa-51 | PBa-84 | PBa-90 | PBa-134 |PBa-135 | PBa-136 | PBa-137 | PBa-138 | PBa-152 | PBa-153 | PBa-163 | PBa-164 | PBa-165 | PBa-166 | PBa-173 | PBa-174 | PBa-175 | PBa-179 | PBa-191 | PBa-192 238 tons 280 planned, 27 completed

Submarine chasers

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Submarine chaser
Class Picture Type Boats Displacement Note
No.1-class auxiliary submarine chaser   Submarine chaser Cha-1 | Cha-2 | Cha-3 | Cha-4 | Cha-5 | Cha-6 | Cha-7 | Cha-8 | Cha-9 | Cha-10 | Cha-11 | Cha-12 | Cha-13 | Cha-14 | Cha-15 | Cha-16 | Cha-17 | Cha-18 | Cha-19 | Cha-20 | Cha-21 | Cha-22 | Cha-23 | Cha-24 | Cha-25 | Cha-26 | Cha-27 | Cha-28 | Cha-29 | Cha-30 | Cha-31 | Cha-32 | Cha-33 | Cha-34 | Cha-35 | Cha-36 | Cha-37 | Cha-38 | Cha-39 | Cha-40 | Cha-41 | Cha-42 | Cha-43 | Cha-44 | Cha-45 | Cha-46 | Cha-47 | Cha-48 | Cha-49 | Cha-50 | Cha-51 | Cha-52 | Cha-53 | Cha-54 | Cha-55 | Cha-56 | Cha-57 | Cha-58 | Cha-59 | Cha-60 | Cha-61 | Cha-62 | Cha-63 | Cha-64 | Cha-65 | Cha-66 | Cha-67 | Cha-68 | Cha-69 | Cha-70 | Cha-71 | Cha-72 | Cha-73 | Cha-74 | Cha-75 | Cha-76 | Cha-77 | Cha-78 | Cha-79 | Cha-80 | Cha-81 | Cha-82 | Cha-83 | Cha-84 | Cha-85 | Cha-86 | Cha-87 | Cha-88 | Cha-89 | Cha-90 | Cha-91 | Cha-92 | Cha-93 | Cha-94 | Cha-95 | Cha-96 | Cha-97 | Cha-98 | Cha-99 | Cha-100 | Cha-151 | Cha-152 | Cha-153 | Cha-154 | Cha-155 | Cha-156 | Cha-157 | Cha-158 | Cha-159 | Cha-160 | Cha-161 | Cha-162 | Cha-163 | Cha-164 | Cha-165 | Cha-166 | Cha-167 | Cha-168 | Cha-169 | Cha-170 | Cha-171 | Cha-172 | Cha-173 | Cha-174 | Cha-175 | Cha-176 | Cha-177 | Cha-178 | Cha-179 | Cha-180 | Cha-181 | Cha-182 | Cha-183 | Cha-184 | Cha-185 | Cha-186 | Cha-187 | Cha-188 | Cha-189 | Cha-190 | Cha-191 | Cha-192 | Cha-193 | Cha-194 | Cha-195 | Cha-196 | Cha-197 | Cha-198 | Cha-199 | Cha-200 | Cha-201 | Cha-202 | Cha-203 | Cha-204 | Cha-205 | Cha-206 | Cha-207 | Cha-208 | Cha-209 | Cha-210 | Cha-211 | Cha-212 | Cha-213 | Cha-214 | Cha-215 | Cha-216 | Cha-217 | Cha-218 | Cha-219 | Cha-220 | Cha-221 | Cha-222 | Cha-223 | Cha-224 | Cha-225 | Cha-226 | Cha-227 | Cha-228 | Cha-229 | Cha-230 | Cha-231 | Cha-232 | Cha-233 | Cha-234 | Cha-235 | Cha-236 | Cha-237 | Cha-238 | Cha-239 | Cha-240 | Cha-241 | Cha-242 | Cha-243 | Cha-244 | Cha-245 | Cha-246 | Cha-247 | Cha-248 | Cha-249 | Cha-250 130 tons 200 planned, 200 completed

Submarine

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Submarine (213)
Class Picture Type Boats Displacement Note
I-1-class   Submarine I-1 | I-2 | I-3 | I-4 | I-5 | I-6 | I-7 | I-8 1,970 tonnes The official designation of the submarine was Junsen-type submarine
I-9-class   Submarine I-9 | I-10 | I-11 | I-12 | I-13 | I-14 2,434 tonnes The official designation of the submarine was Type A (Ko) submarine.
I-15-class   Submarine I-15 | I-17 | I-19 | I-21 | I-23 | I-25 | I-26 | I-27 | I-29 | I-30 | I-31 | I-32 | I-33 | I-34 | I-35 | I-36 | I-37 | I-38 | I-39 | I-40 | I-41 | I-42 | I-43 | I-44 | I-45 | I-54 | I-56 | I-58 2,184 tonnes The official designation of the submarine was Type B (Otsu) submarine.
I-16-class   Submarine I-16 | I-18 | I-20 | I-22 | I-24 | I-46 | I-47 | I-48 | I-52 | I-53 | I-55 2,184 tonnes The official designation of the submarine was Type C (Hei) submarine.
I-361-class   Submarine I-361 | I-362 | I-363 | I-364 | I-365 | I-366 | I-367 | I-368 | I-369 | I-370 | I-371 | I-372 | I-373 1,440 tonnes The official designation of the submarine was Type D (Tei) submarine
I-51-class   Submarine I-51 | I-152 | I-153 | I-154 | I-155 | I-156 | I-157 | I-158 | I-159 | I-60 | I-63 | I-61 | I-162 | I-164 | I-165 | I-66 | I-67 | I-168 | I-169 | I-70 | I-171 | I-73 | I-174 | I-175 | I-176 | I-177 | I-178 | I-179 | I-180 | I-181 | I-182 | I-183 | I-184 | I-185 1,575 tonnes The official designation of the submarine was Kaidai-type submarine
I-121-class   Submarine I-121 | I-122 | I-123 | I-124 1,142 tonnes The official designation of the submarine was Kiraisen-type submarine
I-351-class   Submarine I-351 3,512 tonnes Planned 6. Completed 1.
The official designation of the submarine was Senho-type submarine
I-201-class   Submarine I-201
I-202
I-203
1,503 tonnes The official designation of the submarine was Sentaka-type submarine
I-501-class Submarine I-501 1,616 tonnes Was German Kriegsmarine submarine under the name U-181, until given to Japan May 1945.
I-502-class Submarine I-502 1,610 tonnes Was German Kriegsmarine submarine under the name U-862, until given to Japan May 1945.
I-503-class   Submarine I-503 1,610 tonnes Was a Regia Marina submarine under the name Comandante Cappelini then captured by IJN after Italy's capitulation then given to Kriegsmarine in September 1943 under the name UIT-24. After that captured again by IJN in May 1945 after Nazi-Germany's surrender.
I-504-class Submarine I-504 1,763 tonnes Was Regia Marina submarine under the name Luigi Torelli then it was temporarily interned to IJN after Italy's capitulation then given to Kriegsmarine in September 1943 under the name UIT-25. After that captured again by IJN in May 1945 after Nazi-Germany's surrender.
I-505-class Submarine I-505 1,763 tonnes Was German Kriegsmarine submarine under the name U-219, until given to Japan May 1945.
I-506-class Submarine I-506 1,610 tonnes Was German Kriegsmarine submarine under the name U-195, until given to Japan May 1945.
Ro-11-class   Submarine Ro-11 | Ro-12 | Ro-13 | Ro-14 | Ro-15 | Ro-16 | Ro-17 | Ro-18 | Ro-19 | Ro-20 | Ro-21 | Ro-22 | Ro-23 | Ro-24 | Ro-25 | Ro-26 | Ro-27 | Ro-28 | Ro-29 | Ro-30 | Ro-31 | Ro-32 | Ro-33 | Ro-34 | Ro-35 | Ro-36 | Ro-37 | Ro-37 | Ro-38 | Ro-39 | Ro-40 | Ro-41 | Ro-42 | Ro-43 | Ro-44 | Ro-45 | Ro-46 | Ro-47 | Ro-48 | Ro-49 | Ro-50 | Ro-55 | Ro-56 720 tonnes The official designation of the submarine was Type Kaichū submarine.
Ro-51-class   Submarine Ro-51 | Ro-52 | Ro-53 | Ro-54 | Ro-55 | Ro-56 | Ro-57 | Ro-58 | Ro-59 | Ro-60 | Ro-61 | Ro-62 | Ro-63 | Ro-64 | Ro-65 | Ro-66 | Ro-67 | Ro-68 893 tonnes The official designation of the submarine was Type L submarine
Ro-100-class   Submarine Ro-100 | Ro-101 | Ro-102 | Ro-103 | Ro-104 | Ro-105 | Ro-106 | Ro-107 | Ro-108 | Ro-109 | Ro-110 | Ro-111 | Ro-112 | Ro-113 | Ro-114 | Ro-115 | Ro-116 | Ro-117 525 tonnes
Ha-201-class   Submarine Ha-201 | Ha-202 | Ha-203 | Ha-204 | Ha-205 | Ha-207 | Ha-208 | Ha-209 | Ha-210 | Ha-216 320 tonnes Never saw combat
The official designation of the submarine was Sentaka-Shō type submarine.
Ro-500-class   Submarine Ro-500 1,120 tonnes Was German Kriegsmarine submarine under the name U-511, until given to Japan 16 September 1943.
Ro-501-class Submarine Ro-501 1,144 tonnes Was German Kriegsmarine submarine under the name U-1224, until given to Japan 15 February 1944.
Submarine aircraft carrier (3)
Class Picture Type Boats Displacement Note
I-400-class   Submarine aircraft carrier I-400
I-401
I-402
6,560 tonnes The official designation of the submarine was Sentoku type Submarine.
Transport Submarine (49)
Class Picture Type Boats Displacement Note
Ha-101-class   Transport submarine Ha-101 | Ha-102 | Ha-103 | Ha-104 | Ha-105 | Ha-106 | Ha-107 | Ha-108 | Ha-109 | Ha-111 370 tonnes The official designation of the submarine was Sen'yu type submarine
Yu-class   Transport submarine Yu-1 | Yu-2 | Yu-3 | Yu-4 | Yu-5 | Yu-6 | Yu-7 | Yu-8 | Yu-9 | Yu-10 | Yu-11 | Yu-12 | Yu-13 | Yu-14 | Yu-15 | Yu-16 | Yu-17 | Yu-18 | Yu-19 | Yu-20 | Yu-21 | Yu-22 | Yu-23 | Yu-24 | Yu-1001 | Yu-1002 | Yu-1003 | Yu-1005 | Yu-1006 | Yu-1007 | Yu-1008 | Yu-1009 | Yu-1010 | Yu-2001 | Yu-2002 | Yu-3001 | Yu-3002 | Yu-3003 274 tonnes Used by Imperial Japanese Army.

Submarine tender

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Submarine Tender (3)
Class Picture Type Ships Displacement Note
Jingei-class   Submarine tender Jingei
Chōgei
6,240 tonnes
Taigei-class   Submarine tender Taigei 16,700 tonnes Converted into Light aircraft carrier.

Gunboats

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Gunboats (20)
Class Picture Type Ships Displacement Note
Japanese gunboat Saga   River gunboat Saga 793 Improvement of Uji (1903)
Hashidate-class   Gunboat Hashidate
Uji
1,009
Japanese gunboat Ataka   River gunboat Ataka 880
Fushimi-class   River gunboat Fushimi
Sumida
356
Luzon-class   River gunboat Karatsu 509 Salvaged from the US wreck
USS Wake (PR-3)   River gunboat Tatara 360 The only US ship surrendered to Japanese during World War II
Azio-class   Gunboat Okitsu 625 Salvaged from the Italian wreck
Insect-class   River gunboat Suma 635 Salvaged from the British wreck
Atami-class   River gunboat Atami
Futami
249
Seta-class   River gunboat Seta
Katata
Hira
Hozu
343
Japanese gunboat Kotaka   River gunboat Kotaka 57 Simplified Atami-class gunboat for shallow water (0.64m draft) operations
Japanese gunboat Toba   River gunboat Toba 220
Kozakura-class   River gunboat Kozakura
Shiraume
30
Shōkai Maru-class Gunboat Shōkai Maru
Eikai Maru
Official designation was a high-powered tugboat, however, they did not have any towing facilities. They were actually gunboats and escort ships.

Mine warfare vessels

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Minesweepers (35), minelayers (33) and netlayers (1)
Class Picture Type Ships Displacement, tonnes Note
Hatsutaka-class   Minelayer Hatsutaka
Aotaka
Wakataka
1,626
Japanese minelayer Shirataka   Netlayer Shirataka 1,540
Japanese cruiser Tokiwa   Minelayer Tokiwa 9,667 Converted to minelayer in 1922
Japanese minelayer Itsukushima   Minelayer Itsukushima 2,002 First ever Japanese Navy diesel ship
Kamishima-class   Minelayer Kamishima
Awashima
778
Japanese survey ship Katsuriki   Minelayer Katsuriki 1,565 First purpose-built ocean-going minelayer of Japanese Navy, converted to survey ship in 1942
Japanese minelayer Minoo   Minelayer Minoo 3,276
Japanese minelayer Okinoshima   Minelayer Okinoshima 4,359 Carry a reconnaissance floatplane
Natsushima-class   Minelayer Natsushima
Nasami
Sarushima
483
Tsubame-class   Minelayer Tsubame
Kamome
457
Sokuten-class   Minelayer Toshima | Kuroshima | Ashizaki | Katoku | Entō | Kurokami | Katashima | Enoshima | Ninoshima | Kurosaki | Washizaki 411 2 prototypes of this class decommissioned before World War II
MV Tenyo Maru (1935)   Minelayer Tenyo Maru 6,843
Japanese minelayer Tsugaru   Minelayer Tsugaru 4,064 Carry a reconnaissance floatplane
Japanese minelayer Yaeyama   Minelayer Yaeyama 1,153 Refit as anti-submarine warfare vessel in 1943
Hashima-class   Minelayer Hashima | Tsurushima | Ōtate | Tateishi 1,585 Used to lay remote-controlled mines in coastal fortifications
W-1-class   Minesweeper W-1 | W-2 | W-3 | W-4 | W-5 | W-6 610
W-7-class   Minesweeper W-7 | W-8 | W-9 | W-10 | W-11 | W-12 640 Actually newer than W-13 class
W-13-class   Minesweeper W-13 | W-14 | W-15 | W-16 | W-17 | W-18 533
W-19-class   Minesweeper W-19 | W-20 | W-21 | W-22 | W-23 | W-24 | W-25 | W-26 | W-27 | W-28 | W-29 | W-30 | W-33 | W-34 | W-39 | W-41 658 Primary Japanese minesweeper during World War II
Wa-1-class auxiliary minesweeper   Minesweeper Wa-1 | Wa-2 | Wa-3 | Wa-4 | Wa-5 | Wa-6 | Wa-7 | Wa-8 | Wa-9 | Wa-10 | Wa-11 | Wa-12 | Wa-13 | Wa-14 | Wa-15 | Wa-16 | Wa-17 | Wa-18 | Wa-19 | Wa-20 | Wa-21 | Wa-22

Auxiliary vessels

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Food Supply Ship

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Food Supply Ship (8)
Class Picture Type Ships Displacement Note
Mamiya-class   Food supply ship Mamiya 15,820 tonnes
Ekkai-class Food supply ship Ekkai Maru 2,984 tonnes Originally belonging to Honduras, he was captured in Shanghai the same day the country declared war on Japan.
Nosaki-class   Food supply ship Nosaki 650 tonnes
Kinesaki-class   Food supply ship Kinesaki
Hayasaki
Shirasaki
Arasaki
910 tonnes
Irako-class   Food supply ship Irako 9,570 tonnes
Kurasaki-class Food supply ship Kurasaki
Muroto-class Food supply ship Muroto 8,125 tonnes
Kitakami-Maru-class Food supply ship Kitakami-Maru 498 tonnes

Repair ship

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Repair Ship (2)
Class Picture Type Ships Displacement Note
Asahi-class   Repair ship Asahi 15,200 tonnes Converted from Pre-dreadnought battleship.
Akashi-class   Repair ship Akashi 9,000 tonnes

Survey ship

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Survey Ships (1)
Class Picture Type Ships Displacement Note
Tsukushi-class   Survey ship Tsukushi 1,422 tonnes Planned 2.
Cancelled 1.

See also

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