Top 10 Atrocious Experiments Conducted By Unit 731

World history taught us that war is the worst thing that can happen. For centuries, people used to fight each other, and this has always led to irreparable consequences and thousands of deaths. In history, there were a couple of the most horrible wars, and one of them was the Second World War. In all areas, it lasted 8 years and took more than 50 million lives. But even in this war, there were people whose cruelty and ruthlessness frightened society even today. Unit 731 was a covert biological and chemical warfare research and development unit of the Imperial Japanese Army. It became “worldwide famous” because of the experiments they used to conduct. The crimes committed by the Unit 731 were equal to the crimes of the Nazis against Jews and Gypsies in concentration camps. Lots of Unit 731 movies have doc videos that show how they conduct various horrible experiments with prisoners. Below are 10 of the most atrocious experiments.


Special Chamber Experiments

Usually, Unit 731 used to conduct their experiments in the field. But they also had an area of 6 square kilometers, intended for specific types of experiments. For example, there were high-pressure chambers which pushed victims’ eyes out of their heads and also buildings where subjects were subjected to lethal doses of X-rays.



Japanese culture is based on the ideas of service the master and honorable heroic death. That’s why the practice of dismemberment was a usual thing for Unit 731. They used to amputate limbs to see which blood loss is lethal for the person to reattach amputated limbs to other body parts and see the consequences.


Sexual Assault

No matter how terrible it may sound, sexual crimes are a common thing during the war. Lots of Unit 731 victims became objects of mass rapes and sex slavery. In most cases, these crimes were committed for pleasure, but sometimes they were justified by the Japanese as experiments on sexually transmitted diseases.


Weapons Testing

According to Unit 731 movie, the hostages were very often used to test some experimental weapons. For example, they tied hostages to wooden posts on the field and then Japanese dropped bombs containing deadly diseases and watched the consequences. Such experiments are another example of Unit 731 cruelty.



At all times, one of the greatest problems of wars was frost and cold weather. That’s why Unit 731 used to study the effect of different degrees of frostbite on the human body. They put test subjects outside in the cold, poured cold water on them and waited until the frostbite hit the affected areas.


Venereal Diseases

Together with studying of lethal diseases and its specifications Unit 731 victims were subjects of studying in the course of venereal diseases (syphilis, gonorrhea). They infected unborn babies and studied how syphilis affects the baby’s health and how it harms the reproductive system of the mother.


Lethal Injections

Sometimes Japanese Unit 731 arranged really cruel and notorious experiments. For example, they used to infect hostages with bubonic plague or cholera or anthrax to study the course of the disease and its consequences. They also studied the effects of injecting humans with animal blood, air bubbles that caused embolisms, and seawater.



Vivisection became one of the most common and known among all Unit 731 experiments. Japanese military doctors were interested in how the human body works. That’s why they used to conduct surgery on victims to get the information about the consequences or processes of the disease in the human body.


Nanjing Atrocities

After Japanese army entered Nanjing in December 1937, it decided to arrange massive massacre among the POWs. The atrocities included drownings, beatings, forced incestuous rape, decapitations, mass theft, live burials, and numerous unrecorded crimes. These events became one of the most notorious of the Second Sino-Japanese War.


Biological Warfare

Unit 731 survivors said that probably the most common experimental practice was testing new biological weapons using hostages. In addition to dropping bombs filled with diseases like anthrax, cholera, typhoid they also used to spray plague bacteria from the low-flying airplanes (as it was in the Chechiang province in China in 1940).