Submarines
- 1st Class Submarines
- Junsen-class
- J1 type,Junsen 1 gata (巡潜Ⅰ型?), 4 units, I-1, I-2, I-3, I-4.
- J1M type,Junsen 1 gata kai (巡潜Ⅰ型改?), I-5.
- J2 type,Junsen 2 gata (巡潜Ⅱ型?), I-6.
- J3 type,Junsen 3 gata (巡潜Ⅲ型?), 2 units, I-7, I-8.
- Kou-class
- A1 type, Kou gata(S35) (甲型 (S35)?), 3 units, I-9, I-10, I-11.
- A2 type, Kou gata(S35B) (甲型 (S35B)?), I-12.
- AM type, Kou gata(S35G) (甲型 (S35G)?), 2 units, I-13, I-14.
- Otu-class
- B1 type,Otu gata(S37) (乙型 (S37)?), 20 units, I-15, I-17, I-19, I-21, I-23, I-25, I-26, I-27, I-28, I-29, I-30, I-31, I-32, I-33, I-34, I-35, I-36, I-37, I-38, I-39.
- B2 type,Otu gata(S37B) (乙型 (S37B)?), 6 units, I-40, I-41, I-42, I-43, I-44, I-45.
- B3 type,Otu gata(S37C) (乙型 (S37C)?), 3 units, I-54, I-56, I-58.
- Hei-class
- C1 type,Hei gata(S38) (丙型 (S38)?), 5 units, I-16, I-18, I-20, I-22, I-24.
- C2 type,Hei gata(S38B) (丙型 (S38B)?), 3 units, I-46, I-47, I-48.
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- C3 type,Hei gata(S37D) (丙型 (S37D)?), 3 units, I-52, I-53, I-55.
- Tei-class
- D1 type,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).
- D2 type,Tei gata kai(S51C) (丁型改 (S51C)?), I-373.
- Kaidai-class
- KD1 type,Kaidai 1 gata (海大Ⅰ型?), I-51.
- KD2 type,Kaidai 2 gata (海大Ⅱ型?), I-152(52).
- KD3a type,Kaidai 3 gata a (海大Ⅲ型a?), 4 units, I-153(53), I-154(54), I-155(55), I-158(58).
- KD3b type,Kaidai 3 gata b (海大Ⅲ型b?), 5 units, I-156(56), I-157(57), I-159(59), I-60, I-63.
- KD4 type,Kaidai 4 gata (海大Ⅳ型?), 3 units, I-61, I-162(62), I-164(64),
- KD5 type,Kaidai 5 gata (海大Ⅴ型?), 3 units, I-165(65), I-166(66), I-67,
- KD6a type,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.
- KD6b type,Kaidai 6 gata b (海大Ⅵ型b?), 2 units, I-174(74), I-175(75).
- KD7 type,Kaidai 7 gata (海大Ⅶ型?), 10units, I-176(76), I-177, I-178, I-179, I-180, I-181, I-182, I-183, I-184, I-185.
- Toku type,Toku gata (特型?), 3 units, I-400, I-401, I-402 (I-404 not launched, I-405 not completed).
- Senkou dai type,Senkou-dai (潜高大?), 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
- Kaichu type, 20 units, RO-33, RO-34, 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
- K1 type
- F1 type
- L1 type
- K2 type
- L2 type
- K3 type
- F2 type
- L3 type
- K4 type
- KT type
- L4 type
- KS type
- SS type
- STS type
- 3rd Class Submarines
- Ko-hyoteki class, 50 units.
- Kairyu class, about 250 units (750 planned).
- Kaiten class, about 1000 units.
- C1 type
- C2 type
- S1 type
- Kawasaki-class
- S2 type
- No.71, Dai 71 gou-kan (第71号艦?),71-gou
- Army submarines
- Yu1 class
- Yu1001 class
- Yu2001 class
- Other submarines
- Holland class
- modified Holland class
Read more about this topic: List Of Ships Of The Imperial Japanese Navy