Dr Rosen, a paedophile ?
The scence where the Japanese officer orders the school girls to strip to see if one is really the 'man' they're after....well, obviously he ordered out his soldiers from the room and obviously, the headmistress remained as a chaperone but what was Dr Rosen doing there still ?!
There was no reason for him to be there and he too should have left instead of ogling a roomfull of naked Chinese schoolgirls.
He then takes an interest in one who has a crush in him and seemingly ends up in a relationship with her. He'd be rightly locked up nowadays ! What a perve !