The target of air raid was initially harbors and military works, but air raids were made on the area along the Keihanshin Local Line, including an air raid on Osaka on March 14 and on Kobe on March 17, by B29s and other carrier planes with the aim of destroying the ability to continue the war and depriving people of the will to fight.
最初は港湾や軍需工場を狙ったものだったが、京阪神緩行線の沿線でも3月14日の大阪、3月17日の神戸両市の大空襲を皮切りに、B29から空母艦載機に至るまで、継戦能力の破壊と戦意喪失の両面から無差別攻撃が行なわれるようになった。