List of ships of the Imperial Japanese Navy

The following is the list of ships of the Imperial Japanese Navy for the duration of its existence, 1868-1945. This list also includes ships before the official founding of the Navy and some auxiliary ships used by the Army. For a list of ships of its successor, the Japan Maritime Self-Defense Force, see List of active Japan Maritime Self-Defense Force ships and List of combatant ship classes of the Japan Maritime Self-Defense Force.

Medieval warships

Early modern warships

Western-style sail warships

Steam warships

Corvettes and gunboats


Seaplane tenders

Aircraft carriers


Protected cruisers

Dispatch vessels

Light cruisers

Armored cruisers


Heavy cruisers


1st Class destroyers

2nd Class destroyers

Torpedo boats

River gunboats


Patrol vessels

List of IJN Patrol Vessels can be found here at

  • Patrol Boat # 01-see
  • Patrol Boat # 02-see
  • Patrol Boat # 31-see
  • Patrol Boat # 32-sunk at Battle of Wake Island
  • Patrol Boat # 33-sunk at Battle of Wake Island
  • Patrol Boat # 34-see
  • Patrol Boat # 35-see
  • Patrol Boat # 36-see
  • Patrol Boat # 37-see
  • Patrol Boat # 38-see
  • Patrol Boat # 39-see
  • Patrol Boat # 46-see
  • Patrol Boat # 101-see
  • Patrol Boat # 102-formerly USN Destroyer USS Stewart (DD-224)
  • Patrol Boat # 103-formerly USN minesweeper USS Finch (AM-9)
  • Patrol Boat # 104-see
  • Patrol Boat # 105-see
  • Patrol Boat # 106-see
  • Patrol Boat # 107-see USS Genesee (AT-55)
  • Patrol Boat # 108-see
  • Patrol Boat # 109-see



1st Class submarines

  • Junsen class
    • Type J1, Junsen 1 gata (巡潜Ⅰ型), 4 units, I-1, I-2, I-3, I-4.
    • Type J1M, Junsen 1 gata kai (巡潜Ⅰ型改), I-5.
    • Type J2, Junsen 2 gata (巡潜Ⅱ型), I-6.
    • Type J3, Junsen 3 gata (巡潜Ⅲ型), 2 units, I-7, I-8.
  • Kou class
    • Type A1, Kou gata(S35) (甲型 (S35)), 3 units, I-9, I-10, I-11.
    • Type A2, Kou gata(S35B) (甲型 (S35B)), I-12.
    • Type AM, Kou gata(S35G) (甲型 (S35G)), 2 units, I-13, I-14.
  • Hei class
    • Type C1, Hei gata(S38) (丙型 (S38)), 5 units, I-16, I-18, I-20, I-22, I-24.
    • Type C2, Hei gata(S38B) (丙型 (S38B)), 3 units, I-46, I-47, I-48.
  • Tei class
    • Type D1, Tei gata(S51/S51B) (丁型 (S51/S51B)), 12 units, I-361, I-362, I-363, I-364, I-365, I-366, I-367, I-368, I-369, I-370, I-371, I-372(S51B).
    • Type D2, Tei gata kai(S51C) (丁型改 (S51C)), I-373.
  • Kaidai class
    • Type KD1, Kaidai 1 gata (海大Ⅰ型), I-51.
    • Type KD2, Kaidai 2 gata (海大Ⅱ型), I-152(52).
    • Type KD3a, Kaidai 3 gata a (海大Ⅲ型a), 4 units, I-153(53), I-154(54), I-155(55), I-158(58).
    • Type KD3b, Kaidai 3 gata b (海大Ⅲ型b), 5 units, I-156(56), I-157(57), I-159(59), I-60, I-63.
    • Type KD4, Kaidai 4 gata (海大Ⅳ型), 3 units, I-61, I-162(62), I-164(64),
    • Type KD5, Kaidai 5 gata (海大Ⅴ型), 3 units, I-165(65), I-166(66), I-67,
    • Type KD6a, Kaidai 6 gata a (海大Ⅵ型a), 6 units, I-168(68), I-169(69), I-70, I-171(71), I-172(72), I-73.
    • Type KD6b, Kaidai 6 gata b (海大Ⅵ型b), 2 units, I-174(74), I-175(75).
    • Type KD7, Kaidai 7 gata (海大Ⅶ型), 10 units, I-176(76), I-177, I-178, I-179, I-180, I-181, I-182, I-183, I-184, I-185.
  • Sentoku type, Toku gata (特型), 3 units, I-400, I-401, I-402 (I-404 not launched, I-405 not completed).
  • Sentaka type, Sentaka (潜高), 3 units, I-201, I-202, I-203 (I-204 to I-208 not completed).
  • Senho type, Senho (潜補), I-351 (I-352 not completed).
  • Kiraisen (Mine layer) type, Kiraisen (機雷潜), 4 units I-121, I-122, I-123, I-124.
  • Captured German submarines, 6 units, I-501 (U-181), I-502 (U-862), I-503 (UIT-24), I-504 (UIT-25), I-505 (U-219), I-506 (U-195).

2nd Class submarines

  • Kaichū type
    • Type K1, Kaichū 1 gata (海中I型), 2 units, Ro-11, Ro-12.
    • Type K2, Kaichū 2 gata (海中II型), 3 units, Ro-13, Ro-14, Ro-15.
    • Type K3, Kaichū 3 gata (海中III型), 10 units, Ro-16, Ro-17, Ro-18, Ro-19, Ro-20, Ro-21, Ro-22, Ro-23, Ro-24, Ro-25.
    • Type K4, Kaichū 4 gata (海中IV型), 3 units, Ro-26, Ro-27, Ro-28.
    • Type KT (Toku-Chū), Kaichū 5 gata (海中V型), 5 units, Ro-29, Ro-30, Submarine No. 70, Ro-31, Ro-32.
    • Type K6, Kaichū 6 gata (海中VI型), 2 units, Ro-33, Ro-34.
    • Type KS (Sen-Chū), Kaichū 7 gata (海中VII型), 18 units, Ro-35, Ro-36, 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.
  • Type L
    • Type L1, Ro go jū 1 gata (L1型), 2 units, Ro-51, Ro-52.
    • Type L2, Ro go jū 2 gata (L2型), 4 units, Ro-53, Ro-54, Ro-55, Ro-56.
    • Type L3, Ro go jū 3 gata (L3型), 3 units, Ro-57, Ro-58, Ro-59.
    • Type L4, Ro go jū 4 gata (L4型), 9 units, Ro-60, Ro-61, Ro-62, Ro-63, Ro-64, Ro-65, Ro-66, Ro-67, Ro-68.
  • Ko Type, 18 units, 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.
  • Sen'yu-Shō Type, 10 units, Ha-101, Ha-102, Ha-103, Ha-104, Ha-105, Ha-106, Ha-107, Ha-108, Ha-109, Ha-111 (Ha-110 and Ha-112 not completed)
  • Sentaka-Shō Type, 11 units, Ha-201, Ha-202, Ha-203, Ha-204, Ha-205, Ha-207, Ha-208, Ha-209, Ha-210, Ha-216 (Ha-206, Ha-211 to Ha-215, Ha-217 to Ha-279 not completed)
  • F1 type
  • F2 type
  • Captured German submarines, 2 units, Ro-500 (U-511), Ro-501 (U-1224).

3rd Class submarines

Army submarines

Other submarines

Suicide boats


See also

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