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Type 4 Ka-Tsu
The was a Japanese amphibious landing craft of World War II.
==History==
Japan's combat experience in the Solomon Islands in 1942 which revealed the difficulty of resupplying Japanese forces in such situations prompted the IJN to commence an amphibious tractor program in 1943, as the Ka-Tsu, which was designed by Commander Hori Motoyoshi of the Kure Naval Yard.
The Ka-Tsu's primary purpose was to transport cargo ashore and it was unarmored apart from some light shielding for the crew. Its engine compartment and electric final drives were hermetically sealed, as it was intended to be launched from a submarine.
The first prototype was completed in late 1943 and trials were conducted off Kure in March 1944. By the time that development had been completed, it was proposed that the Ka-Tsu be used to attack US battleships anchored in atolls (such as Ulithi) which could not readily be attacked using conventional means. It was proposed that a Ka-Tsu armed with a pair of torpedoes be dropped off by submarine away from the atoll, propel itself to the outer reef using its tracks, and then enter the lagoon on the inside of the reef. Tests were successfully carried out on a modified Ka-Tsu but the war ended before any such mission could be mounted.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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