My paternal grandfather was a Pacific veteran and hated the Japanese until he died. He also said it was that while it was rare for Japanese to surrender, it was also pretty common to kill the ones who did. I knew a gentleman who passed away about 3 years ago and talked to him about his WWII experiences and he said no one was tougher than his wife. She was a Filipino who had her family rounded up by Japanese as Americans were approaching Manila in 1945. Saw her brother, mother, and father murdered, she and her sister who were about 13 and 15 were set aside for rape but then after a few days they were herded into a group with others and were mowed down with machine gun fire. She played dead for a day or two until American troops arrived and liberated that part of the city. The Japanese were thought to have killed hundreds of thousands of Filipino civilians.