Of course, that's not forgetting the possibility that the Allied invasion force would have been scattered to the four winds by Typhoon Louise which smashed into Okinawa as a Cat. 3 (185kmh/115mph winds) around about the time that the invasion was due to begin. This in turn would have given extra support to the Japanese who would have seen it as a sign from the Shinto gods in the same manner that the Mongolian fleets were scattered by the 'Kami-kaze' at Koan and Bun'ei.

Their resistance would have increased even more.