The city of Hamamatsu was a target for air raids by the USAAF on several occasions during the Pacific War. Hamamatsu, in addition to being a major transportation hub on the Tōkaidō Main Line railway connecting Tokyo with Osaka also had several targets of military significance. It was the location of armaments factories, including Shōwa Yakuhin, Nakajima Aircraft Company, and Suzuki Motors. It was also the location of the Hamamatsu Flight School of the Imperial Japanese Army Air Force and a major military air field. Hamamatsu was also situated on the main flight route from Saipan to either Nagoya or Tokyo and was thus often assigned as a secondary target.