The MV Tenyo Maru was a passenger cargo vessel with a gross register tonnage of 6,843 tons, constructed by Mitsubishi in Nagasaki in 1935 for Toyo Kisen Kabushiki Kaisha. Designed to serve the shipping routes between Japan and the United States, she was chartered to Mitsui and operated on the New York route, providing passenger and cargo services across the Pacific. As a ship of her era, the Tenyo Maru featured a typical early 20th-century passenger cargo design, optimized for transoceanic travel, though specific dimensions and shipbuilding details are not provided in the source. Her service was primarily commercial until her requisition during World War II. On 9 September 1941, she was taken by the Imperial Japanese Navy and converted at the Harima shipyard into a minelayer, a transformation completed by 31 October 1941. During her military service, she was assigned to Mine Division 19 of the Fourth Fleet. During the war, Tenyo Maru participated in notable military operations, including landing troops at Makin Island and transporting construction materials for an air base as part of the Rabaul invasion fleet. Her most significant combat incident occurred during the invasion of Lae-Salamaua on 10 March 1942, when aircraft from USS Lexington and USS Yorktown inflicted two direct bomb hits. The damage caused the vessel to break in two and sink off Lae, New Guinea. She was officially removed from the Navy List on 1 April 1942. Remarkably, remnants of the vessel remained visible for decades; by the 1970s, the bow of the Tenyo Maru was still discernible above the water near the former Lae Airport. The ship’s history highlights its dual role as a commercial liner and wartime auxiliary, reflecting the broader maritime and military history of the period.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.