was a 9-dan professional Go player.
Hashimoto became a pro in 1922 when he was 15. He won the Honinbà  3 times before finally reaching 9p in 1954. He founded the Kansai Ki-in in 1950.
His opponent was Iwamoto Kaoru in the so-called 'Atomic Bomb Game', played Aug. 4-6 in the outskirts of Hiroshima and interrupted by the dropping of the first atomic bomb before being resumed.