Toyama Maru (富山丸) was a 7,089-ton Japanese troop transport during World War II. On 29 June 1944, Toyama Maru was transporting over 6,000 men of the Japanese 44th Independent Mixed Brigade when she was torpedoed and sunk by the submarine USS Sturgeon (SS-187) in the Nansei Shoto, off Taira Jima, Japan, at position 27º47'N, 129º05'E. 5,400 soldiers and crew members were killed during the sinking, although 600 others managed to get off the ship, making the sinking of Toyama Maru one of the worst maritime disasters in history.