in a book by a former brit officer serving in the chindits ,he tells of them sometimes haveing to shoot their own wounded guys when the ija was closeing in on their position ,rather than leaveing them to the tender mercies of the bushido boys ...
Thanks, it was really this information I was looking for. Beyond that I wanted to know if this was an exception from the normal conduct of Japanese submarine commanders or not, not which side was worst.
Yes primarily because of self interest. A sub that's pratting around kill survivors in the water is a sub that is vunerable. Barbarism has risks attached while while being 'mercyful' and allowing the survivors to drown or die of exposure is risk free.