From James Bradley’s interview on Booknotes:

“Most of those guys supposedly ‘captured’ were Korean laborers, slave laborers who gave up. The Japanese who were ‘captured’ generally had a hole in a part of their body, and maybe half of their blood system was already out of their bodies, and they were unconscious. The Japanese were not surrendering. Germans surrendered. Italians surrendered. English surrendered. Americans surrendered in World War II. Japanese, no.“