He was captain of the submarine I-58, which sank the American heavy cruiser  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.
The captain of the submarine I-58 sank an American heavy cruiser in 1945 following its delivery of components and enriched uranium for Little Boy, the first atomic bomb utilized during World War II before the bombing of Hiroshima.