I came across unit 731 on the internet…they were a top secret Japenese organization that operated in a complex with 150+ buildings in it. Towards the end of the war the buildings were destroyed to hide evidence of their war crimes. This is disturbing…
(From: http://en.wikipedia.org/wiki/Unit_731)
A special project code-named Maruta used human beings for experiments. Test subjects were gathered from the surrounding population and were sometimes known as “logs” (maruta 丸太). This term was the result of the feeling of the scientists that killing a prisoner was the same as cutting down a tree. The test subjects ranged from infants, to old people, to pregnant women along with the fetus. Many experiments were performed without the use of anesthetics because it was believed that it might affect the results.
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Vivisection
Live vivisections were performed on prisoners infected with various diseases; scientists would remove organs to study the effects of the disease on the human body.
Prisoners were amputated limb by limb to study blood loss.
Arms were cut off and reattached to opposite sides.
Limbs were frozen and sawed off.
Stomachs were surgically removed and the esophagus was reattached to the intestines.
Parts of brain, lungs, liver, etc were taken out.
Vivisection of a pregnant woman (impregnated by one of the doctors) and the fetus.
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Weapons testing
Grenade tests used human targets at various distances and positions.
Flame throwers were tested on humans.
Bombs were tested on humans tied to stakes at various positions.
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Other experiments
Human subjects were deprived of food and water to study the effects and duration before death.
Prisoners were placed in pressurized chambers until they died.
Frostbite experiments were conducted on prisoners to determine how long humans can survive when exposed to extreme temperatures.
Temperature experiments were performed to determine the relationship between temperature, burns, and survival rate.
Prisoners were placed into centrifuges and spun until they died.
Animal blood was injected into humans.
Prisoners were bombarded with lethal doses of x-ray radiation.
Gas chambers tested chemical weapons on prisoners.
Air bubbles were injected into prisoners’ bloodstreams to simulate a stroke.
Sea water was injected into prisoners to determine if it could be substituted for saline.
Also, at the end of the war the US bought the information that the Japenese had gathered, and in exchange they granted the Japenese scientists amnesty.
SOURCE: http://en.wikipedia.org/wiki/Unit_731