Unit 731.
Well at least they weren’t NAZIS.....I have often wondered at why the Japanese aren’t burdened by world hatred for their acts the way Germans are. Not every German was a Nazi, but every Japanese was a subject of their god emperor and would have gladly willingly committed any act no matter how vile, or die to the last one for him. This is why we were reduced to using the bomb, because many more would have died on each side.