Question

did Hana think japanese torture their prisoners?why?

Answer 1

since red scars behind his ear on his neck she believed that the japanese torture them she had heard rumours and men like general takima beat their wifes so it was not hard to believe

Answer 2

Yes, Hana thought that the Japanese tortured their prisoners of war. While washing the wounded American soldier she saw the deep wounds and red scars on the neck. This made her realize that they undergo an extreme level of torture upon themselves. There were scars under their neck which clearly spoke loudly about the level of torture the prisoners of the war have to undergo.