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JN-25 is the name given by codebreakers to the main, and most secure, command and control communications scheme used by the IJN during World War II. [10] Named as the 25th Japanese Navy system identified, it was initially given the designation AN-1 as a "research project" rather than a "current decryption" job.
Japanese army and diplomatic codes. This article is on Japanese army and diplomatic ciphers and codes used up to and during World War II , to supplement the article on Japanese naval codes . The diplomatic codes were significant militarily, particularly those from diplomats in Germany.
A similar break into the most secure Japanese diplomatic cipher, designated Purple by the US Army Signals Intelligence Service, started before the US entered the war. Product from this source was called Magic. On the other side, German code breaking in World War II achieved some notable successes cracking British naval and other ciphers.
Imperial Japanese Navy ship classifications went through various changes between 1871 and 1945, as technology changed and new ship classes were added while those that became obsolete were discontinued.
Because the Navy had more Japanese-speaking officers, much of the burden of translation fell onto the Navy. And because Japanese is a difficult language, with meaning highly dependent upon context, effective translation required not only fluent Japanese, but considerable knowledge of the context within which the message was sent. Evaluation ...
At the beginning of the Pacific War, the strategy of the Imperial Japanese Navy was underpinned by several key assumptions.The most fundamental was that just as the Russo-Japanese War had been decided by a single naval battle at Tsushima (May 27–28, 1905), the war against the United States would also be decided by a single, decisive battle at sea, or Kantai Kessen. [14]
Japan became the first industrialized Asian country in 1868, by 1920 the Imperial Japanese Navy was the third largest navy in the world and arguably the most modern at the brink of World War II. The Imperial Japanese Navy had a history of successes, sometimes against much more powerful foes as in the 1894–1895 Sino-Japanese War, the 1904 ...
16 May 1945; Sunk by Royal Navy at Battle of the Malacca Strait: Takao: Yokosuka Naval Arsenal, Japan Takao-class heavy cruiser: 15,490 31 May 1932 29 October 1946; Sunk as a target ship in the Strait of Malacca after surrender to the Royal Navy: Atago: Kure Naval Arsenal, Japan: Takao-class heavy cruiser 15,490 30 March 1932