A History of the American-Japanese Campaign of 1931-1933

Japanese Imperial Navy submarines of the Great Pacific War

Notes to take in consideration

Note: The list of Japanese submarines is not yet complete, work in progress.

Note: The Japanese Imperial Navy lost numerous submarines during the war, those mention here are the only once who are mentioned by name in the book.

Note: By the end of the war a total of 126 submarines where in service with the Japanese Imperial Navy.

Note: More than twenty-five to thirty additional submarines where still under construction at the time of the signing of the Peace Treaty of Shanghai on May 15th 1933.

Note: Japanese submarines fall in three classes, medium boats of 700 to 1,100 tons with a radius of some 7,000 to 9,000 miles, large boats of from 1,500 to 2,500 tons with a radius equal to the medium boats and the six Nagasaki-class submarine cruiser who are not mention in the list due them being a separate class of submarine.

Junsen type submarine

Junsen I (I-1 class)

I-1
I-2
I-3
I-4

I-12-class submarine

I-21
I-22
I-23
I-24
I-25
I-26

Kaidai type submarine

Kaidai I (I-51 class)

I-51

Kaidai II (I-52 class)

I-52

Kaidai IIIa/b (I-53 class and I-56 class)

I-53, interred by Chili on August 19th 1931 after she was damaged earlier by United States Navy ships passing Cape Froward on August 9th 1931.
I-54, sunk by Clemson-class destroyers USS Shirk and Wickes-class destroyer USS Rathburne on June 23rd 1931 near Cape Flattery.
I-55
I-56
I-57
I-58, sunk by United States Navy ships near Cape Froward on August 9th 1931.
I-59, sunk by depth charges on September 14th 1932 by United States Navy ships near Truk lagoon.
I-60
I-63

Kaidai IV (I-61/162 class)

I-61
I-62
I-64

Kaidai V (I-65 class)

I-65
I-66
I-67

Kaidai VIa/b (I-68 class and I-74 class)

I-68
I-69
I-70
I-71
I-72
I-73
I-74
I-75
I-76
I-77
I-78

Kaidai VII (I-79 class)

I-79
I-80
I-81
I-82
I-83

Kaichū type submarine

Kaichū I (Ro-11 class)

Ro-11
Ro-12

Kaichū II (Ro-13 class)

Ro-13
Ro-14
Ro-15

Kaichū III (Ro-16 class)

Ro-16
Ro-17
Ro-18
Ro-19
Ro-19
Ro-20
Ro-21
Ro-22
Ro-23
Ro-24
Ro-25

Kaichū IV (Ro-26 class)

Ro-26
Ro-27
Ro-28

Kaichū V (Toku-Chū, Ro-29 class)

Ro-29
Ro-30
Ro-31
Ro-32

Kaichū VI (Ro-33 class)

Ro-33
Ro-34

Type L submarine

Type L1 (Ro-51-class)

Ro-51
Ro-52

Type L2 (Ro-53-class)

Ro-53
Ro-54
Ro-55
Ro-56

Type L3 (Ro-57-class)

Ro-57
Ro-58
Ro-59

Type L4 (Ro-60-class)

Ro-60
Ro-61
Ro-62
Ro-63
Ro-64
Ro-65
Ro-66
Ro-67
Ro-68

Type L5 (Ro-69-class)

Ro-69
Ro-70
Ro-71
Ro-72

Amagi and Akagi would have been battlecruiser versions of the Tosa class battleships.  Both classes would have been armed with 10 x 16in guns as designed.

As I recall, one of Bywater's speculations in the Great Pacific War was that the carriers would be converted back to battlecruisers.

Amagi line drawing:

Have added The Second Battle of Guam (April 3rd 1931) to the first post depicting all known battles fought during the war.

Also the author seemed to me to be a battleship pro person as he had two Japanese carriers converted back into a battleship and battlecruiser.

There is somebody on a different forum who made a great TL about it, it is called the Panay War.

Well there is also the Panay War - Changing The Times and this one Panay War: July-December 1937 (do not know if it is visible for none members but it is sevral chapters long).