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Imperial Japanese Navy Technical Department
The was the externally operating division of the Ministry of the Navy of Japan responsible for the administration of naval vessel construction. From 1923 onward, it took on the role of a research institution for the research and development of naval technologies and engineering. This included studying and investigating existing western naval technology, developing and overseeing Japan's domestic shipbuilding and arms industries, and training officers to become naval engineers and inspectors. The bureau was dismantled along with the naval ministry in November 1945 after Japan surrendered to the Allies at the end of World War II. Taishō period weapons The Department developed various weapons during the Taishō period. These were known a "Xth Year Type" weapons, with the year being the year of the Taishō Emperor's reign (dating from 30 July 1912 - 25 December 1926). [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ministry Of The Navy Of Japan
The was a cabinet-level ministry in the Empire of Japan charged with the administrative affairs of the Imperial Japanese Navy (IJN). It existed from 1872 to 1945. In the IJN and the Imperial Japanese Army (IJA), the ministries were in charge of ''Gunsei'' (軍政, military administration), and Navy General Staff and Army General Staff Office were in charge of ''Gunrei'' (軍令, military command). The two were distinguished. History The Navy Ministry was created in April 1872, along with the Army Ministry, to replace the of the early Meiji government. Initially, the Navy Ministry was in charge of both administration and operational command of the Imperial Japanese Navy. However, with the creation of the Imperial Japanese Navy General Staff in May 1893, it was left with only administrative functions. "The ministry was responsible for the naval budget, ship construction, weapons procurement, personnel, relations with the Diet and the cabinet and broad matters of naval pol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japanese Type L Submarine
The submarines were medium-sized submarines of the Imperial Japanese Navy (IJN), serving during the 1920s and World War II. The ''Type L'' submarines were built with Vickers naval technical guidance. All boats were built in the Mitsubishi Heavy Industries-Kobe Shipyard by the contract with Vickers. Class variants The ''Type L'' submarines were divided into four classes: * * * * ''Type L1 (Ro-51-class)'' In 1916, the Mitsubishi Shipbuilding Corporation got the Vickers ''L'' class submarine informations. Mitsubishi which lost competition to the Kawasaki's ''Type F'' submarines (Fiat- Laurenti design, ''Ro-1'' class and ''Ro-3'' class), bought the license for the ''L'' class submarine from Vickers. The IJN hoped an improvement of submarine technologies will be achieved and ordered this submarine from Mitsubishi. Mitsubishi bought six submarine kits, and built two boats by semi-knock down. The submarine crews were satisfied with the Vickers diesels because they proved to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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, Potsdam Declaration, when it was dissolved following surrender of Japan, Japan's surrender in World War II. The Japan Maritime Self-Defense Force (JMSDF) was formed between 1952 and 1954 after the dissolution of the IJN. The IJN was the third largest navy in the world by 1920, behind the Royal Navy and the United States Navy (USN). It was supported by the Imperial Japanese Navy Air Service for reconnaissance and airstrike operations from the fleet. It was the primary opponent of the Allies of World War II, Western Allies in the Pacific War. The IJN additionally fielded Imperial Japanese Navy land forces, limited land-based forces, including Special Naval Landing Forces, professional marines, Japanese marine paratroopers of World War II, marine paratrooper units, anti-aircraft defense units ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type C Submarine
The was one of the first classes of submarine in the Imperial Japanese Navy (IJN) to serve during the Second World War. ''Type-C'' submarines were better armed than the ''Type-A'' and ''Type-B''. The ''Type-C''s were also utilized as '' Kō-hyōteki'' or ''Kaiten'' mother ships, for this reason they were not equipped with aviation facilities. Class variants The ''Type-C'' submarines were divided into three classes: * * * . However, the ''Vessel number 379''-class was never built. ''Type-C'' (''I-16'' class) Project number S38 and S38B (Latter batch). They were based on the ''I-7'' class. Eight boats were built between 1937 and 1944 under the Maru 3 Programme (Boats 44 - 48) and the Maru Kyū Programme (Boats 376 - 378). *Boats in class ''Type-C Mod.'' (''I-52'' class) Project number S37D. Twenty boats were planned under the Maru Tsui Programme (Boats 625 - 632) and the Kai-Maru 5 Programme (Boats 5141 - 5155). According to their Project number, they were one of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type B Submarine
The was a class of submarine in the Imperial Japanese Navy (IJN) which served during World War II. 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 t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kaidai-type Submarine
The was a type of first-class submarine operated by the Imperial Japanese Navy (IJN) before and during World War II. The type name was shortened to Navy Large Type Submarine. All ''Kaidai''-class submarines originally had a two-digit boat name, from ''I-51'' onwards. On 20 May 1942, all Kaidai submarines added a '1' to their names. For example, ''I-52'' became ''I-152''. Ships are listed by the three-digit boat name if they had one, two-digit if they were not granted one or left service before 20 May 1942. Class variants The ''Kaidai''-type submarines were divided into seven classes and two subclasses: * * * * * * * * * Kaidai I (''I-51'' class) Project number S22. The prototype for the class. The sole Kaidai I, ''I-51'', was based on World War I-era German submarines. She was completed in 1924, refitted with new engines in 1932 and scrapped in 1941. ''I-51'' never saw combat. *Boat in class Kaidai II (''I-152'' class) Project number S25. There was only 1 Kaidai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
14 Cm/40 11th Year Type Naval Gun
The 14 cm/40 11th Year Type naval gun was the standard surface battery for Japanese submarine cruisers of World War II. Most carried single guns, but Junsen type submarines carried two. Japanese submarines ''I-7'' and ''I-8'' carried an unusual twin mounting capable of elevating to 40°. The appended designation ''11th year type'' refers to the horizontal sliding breech block on these guns. Breech block design began in 1922, or the eleventh year of the Taishō period in the Japanese calendar. The gun fired a projectile in diameter, and the barrel was 40 calibers long (barrel length is 14 cm x 40 = 560 centimeters or 220 inches). World War II This gun was the weapon used by , along with torpedoes, to sink , on December 7 1941, the first United States Merchant Marine vessel to be sunk after the entry of the United States into World War II. The type was used by ''I-17'' to sink on December 18, 1941, and to bombard the Ellwood Oil Field near Santa Barbara, Calif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rifled Breech Loader
A rifled breech loader (RBL) is an artillery piece which, unlike the smoothbore cannon and rifled muzzle loader which preceded it, has rifling in the barrel and is loaded from the breech-loading weapon, breech at the rear of the gun. The spin imparted by the gun's rifling gives projectiles directional stability and increased range. Loading from the rear of the gun leaves the crew less exposed to enemy fire, allows smaller gun emplacements or turrets, and allows a faster rate of fire. These rapidly improving breech systems and the powerful new guns they facilitated led to an arms race in fortification and ironclad warship design that led to the battleship class of HMS Dreadnought (1906), HMS ''Dreadnought'' and continued until the start of World War I. Overview The major problem to be solved with breechloading artillery was obturation: the sealing of the breech after firing to ensure that none of the gases generated by the burning of the propellant (initially gunpowder) escaped r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japanese Battleship Tosa
was a planned battleship of the Imperial Japanese Navy. Designed by Yuzuru Hiraga, ''Tosa'' was to be the first of two ships. Displacing and armed with ten guns, these warships would have brought Japan closer to its goal of an "Eight-four" fleet (eight battleships and four battlecruisers). The ship was laid down in 1920, but all work was halted after the signing of the Washington Naval Treaty in 1922. As the treaty required the vessel to be destroyed, it was used for weapons testing before being scuttled in February 1925. Design and construction Designed by Yuzuru Hiraga, ''Tosa'' was intended to be part of a Japanese "Eight-four fleet", comprising eight battleships and four battlecruisers, the successor to the proposed " Eight-eight fleet". ''Tosa'' and its sister ship were intended to be the second set of high-speed battleships (after the ) under the plan, and were approved for construction in the Diet's 14 July 1917 warship-building authorization. Engineering bluepr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naval Mine
A naval mine is a self-contained explosive weapon placed in water to damage or destroy surface ships or submarines. Similar to anti-personnel mine, anti-personnel and other land mines, and unlike purpose launched naval depth charges, they are deposited and left to wait until, depending on their fuzing, they are triggered by the approach of or contact with any vessel. Naval mines can be used offensively, to hamper enemy shipping movements or lock vessels into a harbour; or defensively, to create "safe" zones protecting friendly sea lanes, harbours, and naval assets. Mines allow the minelaying force commander to concentrate warships or defensive assets in mine-free areas giving the adversary three choices: undertake a resource-intensive and time-consuming minesweeping effort, accept the casualties of challenging the minefield, or use the unmined waters where the greatest concentration of enemy firepower will be encountered. Although international law requires signatory nations ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mutsuki Class Destroyer
The were a class of twelve destroyers of the Imperial Japanese Navy. All were given traditional poetic names of the months of the year by the Lunar calendar or phases of the moon. Some authors consider the and ''Mutsuki''-class destroyers to be extensions of the earlier . Background With the imposition of the Washington Naval Treaty limiting the number and size of capital warships, increased emphasis was placed by the Imperial Japanese Navy on the quantity and firepower of its destroyer fleet to counter what was perceived to be the growing threat from the United States Navy. The ''Mutsuki''-class destroyers were an improved version of the ''Kamikaze'' class destroyers and were ordered under the 1923 fiscal budget. Along with the ''Minekaze'' and ''Kamikaze'' classes, the ''Mutsuki''-class ships formed the backbone of Japanese destroyer formations throughout the twenties and thirties. The ''Minekaze'' and ''Kamikaze'' classes were withdrawn from front line service and reassig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wakatake Class Destroyer
The were a class of eight second-class destroyers of the Imperial Japanese Navy. Background The medium-sized ''Wakatake''-class destroyers were a follow-on to the as part of the Imperial Japanese Navy's 8-6 Fleet Program from fiscal 1921 as a lower cost accompaniment to the larger s. The class was originally planned to consist of thirteen vessels, but due to the Washington Naval Treaty, as well as budgetary limitations, the orders for the last four were cancelled in 1922, with the final number being reduced to eight when ''No.14'' was also cancelled. The ''Wakatake'' class was the last class to be rated "second class" and all future destroyers were designed larger. It was planned that the ''Wakatake''-class ships should have names, but upon completion they were given numbers. This proved to be extremely unpopular with the crews and was a constant source of confusion in communications, so in 1928, names were assigned. Design The ''Wakatake''-class destroyers were essentially sli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
