WARNING: GRAPHIC DEPICTIONS OF TORTURE AND GRAPHIC VIOLENCE! POSSIBLE FOOTAGE OF A REAL AUTOPSY IS USED!!! ACCORDING TO THE DIRECTOR, NO CATS WERE HARMED IN THE MAKING OF THIS MOVIE! VIEWER DISCRETION IS ADVISED! Plot: A graphic account of the infamous human experimentation center Unit 731. (HD SUBBED VERSION)
You can stream Man Behind The Sun ( 1988) Unit 731 ( HD Version & English Subtitles) (1988) free and legally on OldReel, via the Internet Archive.
Yes — it is in the public domain and can be watched and shared freely.