Japan marks day atomic bombs fell

Notorious Unit 731

For example, the Imperial Japanese Army's notorious Unit 731, which was based in the Pingfang district of Harbin, the largest city in northeast China at the time, and conducted vivisections on live human beings to test germ-releasing bombs and chemical bombs, among other atrocities.

More than 300,000 people across China were killed by Japan's biological weapons during World War II.

The unit managed to keep its atrocities largely concealed due to the International Military Tribunal for the Far East not prosecuting commanders on the condition they handed over the germ warfare data to the US.