Japanese submarine Yu 1002

Yu 1002 was an Imperial Japanese Army transport submarine of the Yu 1001 subclass of the Yu I type. Constructed for use during the latter stages of World War II, she served in the waters of the Japanese archipelago.

In the final two years of World War II, the Imperial Japanese Army constructed transport submarines — officially the Type 3 submergence transport vehicle and known to the Japanese Army as the Maru Yu — with which to supply its isolated island garrisons in the Pacific. Only submarines of the Yu I type were completed and saw service.

The Yu I type was produced in four subclasses, each produced by a different manufacturer and differing primarily in the design of their conning towers and details of their gun armament, although one source^[1]: 330 states that the Yu 1001 subclass differed from the original Yu 1 subclass in other ways: it was longer, with slightly larger displacement and more powerful diesel engine that increased the maximum speed by 2 knots (3.7 km/h; 2.3 mph), and probably having no deck gun. None of the Yu I-type submarines carried torpedoes or had torpedo tubes. Yu 1002 was a unit of the Yu 1001 subclass.^[1]: 329

Japan Steel Works (Nihon Seikojo) constructed Yu 1002 at its plant in Hiroshima.^[1][2] Records of the details of the construction of Yu 1002 have not been discovered, but the earliest Yu I-type submarines of the original Yu 1 subclass were laid down and launched during the latter half of 1943 and entered service in late 1943 or early 1944.^{[2][1]: 329–330}

Yu 1002 spent her operational career in Japanese home waters.^[1]: 330 In January 1945, several Type I transport submarines were sent to operate from Shimoda on the southern tip of the Izu Peninsula in Shizuoka Prefecture on Honshu,^[1]: 330 and the submarines began transport missions from Shimoda in March 1945.^[1]: 330 Assigned to Detachment 2, Transport Submarine Group, on 11 February 1945,^[1]: 330 Yu 1002 made a round-trip supply voyage from Shimoda to Hachijō-jima in the Philippine Sea sometime during 1945.^{[1]: 330 [2]}

World War II ended with the cessation of hostilities on 15 August 1945. Yu 1002 surrendered to the Allies later in August 1945.^[2] She was subsequently either scuttled or scrapped.^[1]: 330

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