“The Japs used anthrax and other types of germ warfare in China and other countries. Some of the cultures they released are still active.”
IIRC, one of those is a particularly nasty strain of cholera that is now indigenous to an area of N.E. China.
If you set up a scale of bad behavior in war time...the Germans have an awful lot on their side...the slaughter of the Jews, various villages in the Ukraine that were decimated, and countless acts. But when you examine the use of germ warfare, the events on the high seas, the treatment of Koreans and Chinese...I think the Japanese easily are the group that got off easily. Most of their “bad” history has been forgotten...while many still sit around and talk the “bad” Germans.