I read an article about this one, and the infamous Unit 731. It was one of the most hellish things I had ever read.
Same here except my threshold of tolerance for the details was too low to read all the details. Horrifying, unutterable that so-called humans could do such things to animals let alone other humans. And Japan has never issued one apology, hardly an acknowledgement of it. That’s partly our fault for giving them a pass in exchange for such a poisoned chalice of information acquired thusly, though even otherwise Japan isn’t much for acknowledging or apologizing for their war crimes. But they sure can bleat about their “victimhood”- they begged for having those bombs dropped on them by their policy of no surrender and “fight till everyone is dead, civilians and all”.