"Once Infected, Death Was Certain": Inside Japan's Secret Death Lab | Inside Unit 731 - Part 1

Key Concepts

• Unit 731: A covert biological and chemical warfare research and development unit of the Imperial Japanese Army during the Second Sino-Japanese War and World War II.
• Maruta (Log): A dehumanizing term used by Unit 731 personnel to refer to human test subjects.
• Vivisection: The practice of performing surgical operations on living subjects without anesthesia for experimental purposes.
• Biological Warfare: The use of pathogens (plague, anthrax, cholera, typhoid) and disease vectors (fleas) as weapons of war.
• Pingfang: The primary site of Unit 731’s headquarters in Harbin, China.
• Syonan: The Japanese name for Singapore during the occupation.
• The Devil’s Gluttony: A seminal book by Seiichi Morimura that first exposed the atrocities of Unit 731 to the Japanese public.

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1. Origins and Structure of Unit 731

• Establishment: Formed in 1936 under the leadership of Shirō Ishii, the unit was officially known as the "Epidemic Prevention Research Laboratory."
• Strategic Location: Established in Pingfang, Harbin, because the Japanese military could conduct human experiments in China that were prohibited or politically sensitive in Japan.
• Scale: The facility housed over 3,000 personnel. The core experimental area, the Sifang building, was divided into wings for male and female detainees, with specialized laboratories for frostbite, dysentery, and plague research.
• The Darkroom: A specialized third-floor laboratory dedicated to the mass breeding of fleas, which served as the primary vector for spreading pathogens.

2. Methodologies and Human Experimentation

• Dehumanization: Subjects—including Chinese, Koreans, Russians, and Mongolians—were labeled marutas to strip them of their humanity, justifying their use as disposable biological material.
• Experimental Procedures:
  • Vivisection: Performed on conscious subjects to study the effects of bacteria and pathogens without the interference of decomposition.
  • Pathogen Testing: Subjects were exposed to plague, anthrax, and cholera. In Anda, researchers used fixed-point detonations and aerial dispersal to test the efficacy of these weapons.
  • Wound Induction: Subjects were bound and exposed to shrapnel to create open wounds, allowing bacteria to enter the bloodstream directly.
  • Frostbite/Chemical Tests: Subjects were subjected to extreme sub-zero temperatures and poison gas (mustard gas) to observe physiological reactions.

3. Real-World Applications and Biological Warfare

• Quzhou Attacks (1940–1942): Japanese aircraft dropped millet, wheat, and eight kilograms of plague-infected fleas over commercial districts. By 1941, the death toll in the region exceeded 9,000.
• Deception Tactics: In 1942, Unit 731 members disguised themselves as Chinese soldiers to distribute contaminated food (rice cakes/steamed buns) to civilians, leading to mass outbreaks of disease.
• Southeast Asian Expansion: Evidence indicates that Unit 731 expanded operations to Singapore (Syonan) and Thailand. Researchers brought viruses to Singapore to conduct experiments on Prisoners of War (POWs) at Changi Camp, resulting in documented cases of scrub typhus and other illnesses.

4. Post-War Cover-up and Testimony

• Destruction of Evidence: In August 1945, as the war neared its end, the Japanese military ordered the destruction of all documents, facilities, and the execution of all remaining marutas.
• Silence and Immunity: Many former Unit 731 members returned to Japan’s medical community and maintained silence for decades. Shirō Ishii ordered members to take the secret to their graves.
• Historical Recovery: The truth was largely hidden until the 1980s. Researchers like Professor Matsumura discovered scientific records in second-hand bookstores, providing empirical evidence of the atrocities.

5. Notable Quotes

• "They called the subjects marutas to dehumanise them. Maruta means log. So the people were being treated just like logs." — Narrator
• "Why did you stop? Did you stop being human as well?" — Rhetorical question regarding the perpetrators.
• "I wanted to restore their dignity as human beings." — Liao Zheng Yan, on his project to photograph elderly survivors.

6. Synthesis and Conclusion

The history of Unit 731 represents a systematic, state-sponsored program of atrocity that utilized medical science for the purpose of mass murder. The transition from "research" to "biological warfare" was seamless, with the Japanese military viewing human lives as mere data points. The legacy of these actions persists today through the physical suffering of elderly survivors and the ongoing efforts of historians to declassify archives, ensuring that the "hell on earth" created in Pingfang and beyond is not erased by the passage of time or the deliberate destruction of evidence.