What was the goal of human experimentation?
Preparing For Biological Germ Warfare
One main reason for the Japanese researchers to carry out these experiments was to learn what exactly would happen to the human body when infected with different diseases such as syphilis, anthrax, cholera, typhoid, plague, and different bacterias just to name a few. Then the doctors would perform vivisections (live dissections) without any pain medications or anesthesia to see what different diseases would do to the organs before death.
Human experimentation by Japanese medical staff
Details about the war crimes committed against humanity by the Japanese...
Not only did Unit 731 purposely infect subjects with illnesses and perform vivisections without anesthesia, but they also tortured the people by tying them to stakes and exposing them to biological weapons like bombs filled with plague-infested fleas and plague cultures. More experiments occurred such as locking test subjects into pressure chambers and testing how much pressure it would take for their eyes to pop out of their sockets. Others were left outside during harsh winter conditions and kept outside until their limbs froze off or were severed off to allow medical staff to determine how to treat frostbite. They also tested things such as how much blood one would need to lose before dying, where they would take test subjects and drain them of 500 milliliters of blood every few days until the subjects grew so weak and eventually passed away from blood loss. There were also records found that outlined the effects of copious amounts of tetanus vaccines to see how long it took for the subjects to die from it and proceeded to record the muscle spasms that occurred. The Japanese also wanted to develop an even stronger, more potent poison gas so they tested various poisonous gases on the test subjects which meant they were exposed to those toxins and died from the poisoning. Not a single person that went into Unit 731 as a test subject made it out alive.
Pictured above is a deceased test subject on a gurney being disposed of by Unit 731
Unfortunately there is still so much we do not know about Unit 731 because of the cover ups and secrecy behind the operation, even to this day. Records were destroyed so no one knows exactly how many people suffered and died at the hands of the Japanese regime and it is a subject we may never know in full. This is why it is inaccurate to compare the Nazi's to the Japanese at this time because Germany was able to be held responsible for their actions since there was a lot of military involvement, but in the case of Unit 731 there was a great deal of secrecy and in order to gain information, the Japanese were granted immunity and were even paid to talk about the atrocities that took place in Unit 731. Due to those destroyed records there are still a ton of unanswered questions. There is suspected to be about 400,000 deaths that occurred due to disease, and thousands more lost to the experimentations of pushing test subjects to their limit and seeing how much it takes to kill them.