The was a class of submarine in the
Imperial Japanese Navy
The Imperial Japanese Navy (IJN; Kyūjitai: Shinjitai: ' 'Navy of the Greater Japanese Empire', or ''Nippon Kaigun'', 'Japanese Navy') was the navy of the Empire of Japan from 1868 to 1945, when it was dissolved following Japan's surrender ...
(IJN) which served during
World War II
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...
. The ''Type-B'' submarines were similar to the
''Type-A'' apart from not having the headquarters installation.
Class variants
The ''Type-B'' submarines were divided into four classes:
*
*
*
* . The ''5115th vessel''-class submarines were not built and remained a design only.
''Type-B'' (''I-15'' class)
Project number S37. Twenty boats were built between 1937 and 1944 under the
Maru 3 Programme (Boats 37 - 42) and
Maru 4 Programme (Boats 139 - 152).
''Type-B Mod.1'' (''I-40'' class)
Project number S37B. Six boats were planned under the
Maru Kyū Programme (Boats 370 - 375), all boats were completed. On the outside this class looked the same as the ''I-15'' class; however, they were built from high-tensile strength steel and equipped with diesel engines of a simpler design.
''Type-B Mod.2'' (''I-54'' class)
Project number S37C. Twenty-one boats were planned under the
Maru Kyū Programme (Boats 627 - 636) and
Kai-Maru 5 Programme (Boats 5101 - 5114). Eighteen boats were cancelled in late 1943, because the IJN was setting the as 1945's main submarines.
*Boats in class
''V22A Type''
Project number S49A. Eighteen boats were planned under the
Kai-Maru 5 Programme (Boats 5115 - 5132). However, all boats were cancelled in late 1943, because the IJN concentrated on production of from 1945.
*Boats in class
Characteristics
References
Notes
Bibliography
*
* '', History of Pacific War Vol.17 I-Gō Submarines'',
Gakken
is a Japanese publishing company founded in 1947 by Hideto Furuoka, which also produces educational toys. Their annual sales is reported at ¥ 90 billion ($789 million US).
Gakken publishes educational books and magazines and produces other ...
(Japan), January 1998,
* ''Rekishi Gunzō, History of Pacific War Vol.35 Kō-hyōteki and Kōryū'', Gakken (Japan), April 2002,
* ''Rekishi Gunzō, History of Pacific War Vol.36 Kairyū and Kaiten'', Gakken (Japan), May 2002,
* ''Rekishi Gunzō, History of Pacific War Extra, "Perfect guide, The submarines of the Imperial Japanese Forces"'', Gakken (Japan), March 2005,
* ''Model Art Extra No.537, Drawings of Imperial Japanese Naval Vessels Part-3'', Model Art Co. Ltd. (Japan), May 1999, Book code 08734-5
* ''The Maru Special, Japanese Naval Vessels No.31 Japanese Submarines I'', Ushio Shobō (Japan), September 1979, Book code 68343-31
{{DEFAULTSORT:B submarine
Submarine classes
Submarines of the Imperial Japanese Navy