Marxist Germany wrote:To all those defending the Japanese empire: Unit 731Thousands of men, women, children and infants interned at prisoner of war camps were subjected to vivisection, often without anesthesia and usually ending with the death of the victim.[25][26] Vivisections were performed on prisoners after infecting them with various diseases. Researchers performed invasive surgery on prisoners, removing organs to study the effects of disease on the human body.
[...]
Prisoners had limbs amputated in order to study blood loss. Those limbs that were removed were sometimes re-attached to the opposite sides of the body. Some prisoners had their stomachs surgically removed and the esophagus reattached to the intestines. Parts of organs, such as the brain, lungs, and liver, were removed from some prisoners.
[...]
At least 12 large-scale field trials of biological weapons were performed, and at least 11 Chinese cities were attacked with biological agents. An attack on Changda in 1941 reportedly led to approximately 10,000 biological casualties and 1,700 deaths among ill-prepared Japanese troops, with most cases due to cholera.[4] Japanese researchers performed tests on prisoners with bubonic plague, cholera, smallpox, botulism, and other diseases.[33] This research led to the development of the defoliation bacilli bomb and the flea bomb used to spread bubonic plague.[34] Some of these bombs were designed with porcelain shells, an idea proposed by Ishii in 1938.
[...]
During the final months of World War II, Japan planned to use plague as a biological weapon against San Diego, California. The plan was scheduled to launch on September 22, 1945, but Japan surrendered five weeks earlier.[35][36][37][38] Plague fleas, infected clothing and infected supplies encased in bombs were dropped on various targets. The resulting cholera, anthrax, and plague were estimated to have killed at least 400,000 Chinese civilians.[39] Tularemia was also tested on Chinese civilians.[40]
[...]
Army Engineer Hisato Yoshimura conducted experiments by taking captives outside, dipping various appendages into water, and allowing the limb to freeze.[49] Once frozen, which testimony from a Japanese officer said "was determined after the 'frozen arms, when struck with a short stick, emitted a sound resembling that which a board gives when it is struck'",[50] ice was chipped away and the area doused in water, limbs brought close to fire and other "methods" used to determine the effect it had on frostbite. The effects of different water temperatures were tested by bludgeoning the victim to determine if any areas were still frozen.
[...]
"Infection of venereal disease by injection was abandoned, and the researchers started forcing the prisoners into sexual acts with each other. Four or five unit members, dressed in white laboratory clothing completely covering the body with only eyes and mouth visible, rest covered, handled the tests. A male and female, one infected with syphilis, would be brought together in a cell and forced into sex with each other. It was made clear that anyone resisting would be shot."
[...]
Female prisoners were forced to become pregnant for use in experiments. The hypothetical possibility of vertical transmission (from mother to child) of diseases, particularly syphilis, was the stated reason for the torture. Fetal survival and damage to mother's reproductive organs were objects of interest. Though "a large number of babies were born in captivity", there have been no accounts of any survivors of Unit 731, children included. It is suspected that the children of female prisoners were killed after birth or aborted.
Jesus christ that's... that's horrifying...