During the summer of 1944, 47 B-29s raided the Yawata steel works from bases in China; only one plane actually hit the target area, and with only one of its bombs. This single 500 lb general purpose bomb (which hit a powerhouse located 3,700 ft from the far more important coke houses that constituted the raid’s aiming point) represented one quarter of one per cent of the 376 bombs dropped over Yawata on that mission.