Mochitsura Hashimoto (橋本以行, Hashimoto Mochitsura, 1909 – 25 October 2000) was a Japanese officer and a submarine commander in the Imperial Japanese Navy during World War II. He was captain of the submarine I-58, which sank the American heavy cruiser USS Indianapolis in 1945 after its delivery of parts and enriched uranium for the first atomic weapon used in wartime, Little Boy, prior to the attack on Hiroshima.