Takamatsu was selected as a target by the United States' XXI Bomber Command because the city was thought to be an important focal point of Shikoku's rail and road transit systems, and containing some industry vital to supporting the war effort.
On July 3, 1945 towards the end of World War II, at 6:40 PM (JST) 128 B-29 aircraft took off to bomb Takamatsu.