Japanese air attacks on the Mariana Islands commandos undertook intensive training at Saitama Kanto and the raid was scheduled to take place on January 17, 1945, but was canceled after damage to the airfields at Iwo Jima. The Giretsu Airborne Unit instead attacked a U.S. airbase at Okinawa on 24 May, destroying nine aircraft and damaging another 29. Following the perceived success of the raid on Okinawa the IJN developed plans for a force of naval commandos to attack airfields in the Marianas. On June 24, it issued orders for a raid involving 30 Yokosuka P1Y "Frances" bombers and 20 G4Ms carrying naval commandos. The plan, Operation
Attack on Yokosuka airfields around Tokyo and claimed to have destroyed 340 Japanese aircraft on the ground and two in the air. No Japanese aircraft responded to this attack as they were being held in reserve to mount large-scale suicide attacks on the Allied fleet during the expected invasion of the country later in 1945. Following this raid, the Third Fleet conducted raids on Hokkaido and northern Honshu on 14 and 15 July which sank large numbers of ships and destroyed 25 aircraft on the ground. The American warships then sailed south and on 16 July were joined by the British Pacific Fleet's