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The was a
Four boats were built in 1923-1929. Genealogy of the large-size submarine in the IJN began with . Japan received six
This is a type which added a
Project number S32. This is a type which added a catapult to the Junsen I Mod. She was built in 1931 under the 1st Naval Armaments Supplement Programme (''Maru'' 1).
Project number S33. These boats combined the good points of the Junsen II and the Kaidai V. They were built in 1934 under the Maru 2 Programme.
Junsen III became a 'typeship' for the Type- A, B and C.
ship class
A ship class is a group of ships of a similar design. This is distinct from a ship type, which might reflect a similarity of tonnage or intended use. For example, is a nuclear aircraft carrier (ship type) of the (ship class).
In the course ...
of submarine
A submarine (or sub) is a watercraft capable of independent operation underwater. It differs from a submersible, which has more limited underwater capability. The term is also sometimes used historically or colloquially to refer to remotely op ...
s of 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). There were four submarine designs of the Junsen type: J1, a modified J1, J2 and the J3.
Class variants
The Junsen type submarines were divided into four classes: * * * * .Junsen I (''I-1'' class)
Four boats were built in 1923-1929. Genealogy of the large-size submarine in the IJN began with . Japan received six U-boat
U-boats were naval submarines operated by Germany, particularly in the First and Second World Wars. Although at times they were efficient fleet weapons against enemy naval warships, they were most effectively used in an economic warfare role ...
s from Germany as reparations
Reparation(s) may refer to:
Christianity
* Restitution (theology), the Christian doctrine calling for reparation
* Acts of reparation, prayers for repairing the damages of sin
History
*War reparations
**World War I reparations, made from G ...
of World War I
World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, the United States, and the Ottoman Empire, with fightin ...
. The IJN copied , one of the six, producing the ''I-21''-class minelayer submarine. The IJN could not find an optimal design of fleet submarine, so they and Kawasaki Heavy Industries
(or simply Kawasaki) is a Japanese Public company, public multinational corporation manufacturer of motorcycles, engines, Heavy equipment (construction), heavy equipment, aerospace and Military, defense equipment, rolling stock and ships, headq ...
sent many technical officers to the United Kingdom and Germany and got drawings of advanced submarines. The British L class became the Kaidai I, the K class became the Kaidai II and ''U-142'' become Junsen I.
Junsen I Mod (''I-5'' class)
This is a type which added a floatplane
A floatplane is a type of seaplane with one or more slender floats mounted under the fuselage to provide buoyancy. By contrast, a flying boat uses its fuselage for buoyancy. Either type of seaplane may also have landing gear suitable for land, ...
to the Junsen I.
Junsen II (''I-6'' class)
Project number S32. This is a type which added a catapult to the Junsen I Mod. She was built in 1931 under the 1st Naval Armaments Supplement Programme (''Maru'' 1).
Junsen III (''I-7'' class)
Project number S33. These boats combined the good points of the Junsen II and the Kaidai V. They were built in 1934 under the Maru 2 Programme.
Junsen III became a 'typeship' for the Type- A, B and C.
Characteristics
Footnotes
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 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
External links
{{DEFAULTSORT:Junsen type submarine Submarine classes Submarines of the Imperial Japanese Navy