I remember seeing an interview of a Japanese woman who had been a 16 year old on Okinawa during the battle.
She was forced into a cave where she was then forced to aid the Japanese Army. They had been told of how horrible the Americans treated captured Japanese.
She said after the battle was over, she was surprised that the Americans treated her better than her own people did.
Many if not most Japanese don’t consider Okinawa people as real Japanese.