Would Allied service change Japanese treatment of prisoners?

Would fighting beside Britain change Japanese treatment of prisoners and occupied populations?

It probably would moderate practice, especially where prisoners were held jointly, though it would not automatically erase underlying attitudes.

Occupied territories would often be administered jointly, placing Japanese forces within common arrangements. Transporting European prisoners to Japanese camps would also be less practical than handing them to British camps in North Africa. Yonai could demand behaviour consistent with Japan's position in an alliance of great powers. These pressures could moderate treatment even if underlying attitudes remained.