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      • Unit 731 - Guide >
        • Background of Biochemical Warfare Development
        • Imperial Japan's Chemical Warfare Development Program
        • Map of Unit 731
        • Personnel of Unit 731
        • Duties of Unit 731
        • Human Experimentation
        • [GRAPHIC] Germ Warfare Attacks
        • Cover Ups After the War
        • [OLD] Cover Ups After the War
      • Philippines' Resistance - Guide >
        • Philippines World War II Timeline
        • The Japanese Invasion & Conquest of the Philippines
        • Bataan Death March
        • Formation of Underground Philippines Resistance
        • Supplies of the Guerrilla Fighters
        • The Hukbalahap
        • Hunter's ROTC
        • Marking's Guerrillas
        • United States Army Forces in the Philippines of Northern Luzon (USAFIP-NL)
        • The Aetas
        • Chinese and Filipino-Chinese Nationalist Guerrilla Units
        • The Female Faces of the Philippine Guerrillas
      • Rising Sun Flag - Guide >
        • History of the Rising Sun Flag
        • Atrocities Committed Under the Flag
        • Rising Sun Flag in Pop Culture
      • Pinay Guerrilleras - Guide >
        • Japanese Occupation of the Philippine Islands: Pinays Answering the Call to Arms
        • The Fierce Heneralas and Kumanders of the Hukbalahap Guerrillas
        • Amazons of the Pacific Theater
        • Filipina American Veterans: Recovering the Extraordinary Feats of the Ordinary Pinays
        • The Legacy of the Asian Women Soldier
      • Fall of Singapore - Guide >
        • Singapore World War II Timeline
        • History of World War II in the Pacific
        • History of Singapore
        • Japan's Conquest in Asia
        • Japan's Invasion of the Malay Peninsula
        • Sook Ching Massacre
        • Double Tenth Incident
        • Social Changes and Challenges in Singapore
        • Voices from Syonan
        • Return to British Rule
      • Three Years and Eight Months - Guide >
        • Hong Kong before WW2
        • Buildup to World War 2
        • The Battle of Hong Kong
        • Life during 3 Years and 8 Months
        • East River Column Guerrilla Fighters
        • Prisoners of War Camps
        • End of Japanese Occupation
        • War Crimes Trials
      • Siamese Sovereignty - Guide >
        • The Land of Smiles
        • The Thai-Japanese Relationship
        • Phibun’s Domestic and International Policies
        • The Free Thai Resistance Movement
        • Post WW2 Aftermath of Thailand
      • The Khabarovsk War Crimes Trial - Guide >
        • Defendants of Khabarovsk War Crime
        • The Japanese Empire and USSR in WW2
        • The Employment of the Bacteriological Weapon in the War
        • Planning of Japan invasion to USSR
      • Unit 731 Cover-up : The Operation Paperclip of the East - Guide >
        • Establishing Manchukuo
        • The Development of Unit 731
        • Plan Kantokuen and Bacteriological Warfare
        • The Downfall of the Japanese WW2 Era
        • Three Stages of Interrogations
        • Lasting Impacts
      • Marutas of Unit 731 - Guide >
        • How did Ishii Shiro start unit 731?
        • A Beta Testing Site
        • Establishing Pingfan
        • Experiences at the Human Experimentation Complex
        • Vivisection at the Unit 731
        • Anta Testing Grounds
        • Overall Advance from the Laboratory Creations
        • The End of the War
      • Prince Konoe Memoir - Guide >
        • Who is Prince Konoe?
        • Preparation to Tripartite Pact
        • Emperor Hirohito and Prince Konoe
        • The End of Prince Konoe
      • Competing Empires in Burma - Guide >
        • What was the China-Burma-India Theater?
        • When did the China-Burma-India Theater Happen?
        • Who Fought in the China-Burma-India Theater?
        • The Second Sino Japanese War
        • Japan in the South
        • Operation U-Go
      • Battle of Shanghai - Guide >
        • The Battle of Shanghai. Background
        • Shanghai Before War
        • The First Battle of Shanghai 1932
        • Battle of Shanghai 1937
        • Aftermath of Battle for Shanghai
      • Ishi Shiro - Guide >
        • History of Biological Weapons and The Young Ishii Shiro
        • Establishment in Manchuria
        • Pingfang District - Harbin
        • Failures and Corruption
        • Post War
      • Taiwan The Israel of the East - Guide >
        • Background of Formosa
        • Industrialization of Japan
        • China During WWII
        • Taiwan under Kuomintang
        • New Taiwanese National Identity
      • Seeking Justice for Biological Warfare Victims of Unit 731 - Guide >
        • Introduction of Wang Xuan
        • Colonel Memorandum
        • The Beginning of Biological Warfare
        • The Bacteriological Warfare on China
        • Victims in Zhejiang’s Testimonies
        • After the War
      • Rice and Revolution - Guide >
        • The French Colonial Period
        • Anti-Colonial Resistance
        • The Rise of the Communist Movement
        • Imperial Japan’s Entry into Indochina
        • The Portents of Famine
        • The Famine (1944-45)
        • Legacy of the 1944-45 Vietnam Famine
      • Clash of Empires - Guide >
        • Japan’s Imperialist Origins
        • Japan’s Competition against the West: Nanshin-ron and Hokushin-ron
        • Japanese Imperialism Through the Lens of French Indochina
        • The U.S.-Japan Relations and the Pearl Harbor Attack
    • Lesson Plans >
      • Reparations
      • Ethics in Science
      • Writing the Narrative of a Pinay Fighter
      • Privilege Journal
      • Environmental Injustices
      • Female Guerrillas
      • Hunter's ROTC
      • Scientific Advancements
      • Seeking Justice: A Humanities Lesson Plan
      • The Hukbalahap
      • Trading Immunity
      • Bataan Death March
      • Biochemical Warfare Development
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Experiences at the Human Experimentation Complex

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“Ro” and “Ha”


The buildings in number 7 and 8, nicknamed “Ro” and “Ha”, were very important since they housed the logs and were heavily guarded to ensure secrecy. Building 7 housed male victims while building 8 housed females and children. Depending on the type of research for which a victim was needed, the cell had either single or multiple occupants. Buildings 7 and 8 were designed to house 400 inmates, but most believe that an average of 200 inmates were housed at any given time. Each cell had windows near the floor to make it easier to draw blood samples and walls were 30-40 centimeters thick. The cells were kept clean to ensure the quality of research and each cell even had a flushing toilet.

The
Warfare Museum - Unit 731 - Harbin, Manchuria, China

Victims normally were brought to Pingfan in the dead of night in crammed freight cars with lumber logs on top or were delivered in grayish-green paneled Dodge trucks owned by the Kempeitai. The victims were then brought into the building via a secret tunnel. According to a witness, Fang Shen Yu, technicians in white coats handled the victims who were tied in bags so tightly that their head and feet touched each other. The way to secure victims was similar to the method of securing victims in the Zhong Ma Complex, but on a larger scale at Pingfan. Anyone charged with any type of crime such as anti-Japanese sentiment, opium smoking, espionage, communism, mental handicap or homelessness was sent to Unit 731 for experiments. Victims included mainly Chinese, stateless White Russians, Harbin Jews, Soviet prisoners captured at the borders, Mongolians, Koreans, and Europeans accused of espionage. During the Khabarovsk Trial, Major Iijima Yoshio admitted that he was personally responsible for subjecting at least 40 Soviet citizens to certain human experiments. The Chief of the Kwantung Army Kempeitai, Major General Shirokura, had issued Operational Order 224, which sent 30 prisoners to Unit 731.

"Lumber Mill" of Death


The diversity of prisoners ensured the reliability of the research data. Each prisoner was assigned a number that started with 101 and ended at 1500. Once 1500 was reached, they began again at 101, which made it impossible to determine how many actually fell victim to Unit 731. No one was allowed to survive Unit 731 alive. “If a prisoner survived the inoculation of lethal bacteria, this did not save him from repeated experiments, which were continued until death from infection supervened. The infected victims were given medical treatment in order to test various methods of restoring soundness. They were fed normally and, after full recovery, were used for the next experiment and infected with another type of germ. Ultimately, no one ever left this death factory alive. Since Unit 731 had been labelled a lumber mill to the locals, most either did not worry about the complex or were too afraid to do so. The role of prison warden was assigned to Ishii’s own brother, Mitsuo, to ensure no secret leaked out.

Picture
Operational order # 224 of the Kwantung gendarmerie about mass "special dispatch", page 1

​As requested by the Command of the Japanese Air Force, Unit 731 also housed a pressure chamber to test the endurance of human organs at high altitudes. In this chamber, men died painful deaths. Many sacrificed their lives for scientific advancement and it was well known in the Japanese scientific community that humans were used as test subjects for their scientific papers. In fact, some scientific papers  from Unit 731 researchers referred to their subjects as “Manchurian monkeys”, “monkeys”, “Taiwan monkey”, and “Formosan monkey”. It was an open secret in the Japanese medical society that they were using humans as experimental subjects.

Related Book

Picture
Get the book!

 Marutas of Unit 731: Human Experimentation of the Forgotten Asian Auschwitz

Euphemistically labeled as the "Water Supply and Prophylaxis Administration" and "HippoEpizootic Administration" of the Imperial Japanese Army, Unit 731 and Unit 100, as well as their subsidiary branches, performed human experimentation on the innocent under the leadership of Commanding Officer and Doctor Ishii Shiro. The Kempeitai (military police) captured the "lab rats" for Unit 731's prison. The prisoners included Chinese patriots, nearby civilians, Russians, and Allied prisoners of war. Although the exact number of victims is unclear due to Japan's attempts to liquidate evidence of their heinous crimes at the closing of the war, it is estimated to have ranged from 3,000-250,000 innocent men, women, and children. The cruel experiments and medical procedures were carried out by the brightest medical students, scientists, researchers, and staff that Imperial Japan had to offer.

​To dehumanize prisoners in their minds, the scientists of Unit 731 called their test subjects "Marutas" or logs. Unit 731 faculty's observation of Marutas included their reaction to bubonic plague, typhoid, paratyphoid A and B, typhus, anthrax, smallpox, tularemia, infectious jaundice, gas gangrene, tetanus, cholera, dysentery, glanders, scarlet fever, undulant fever, tick encephalitis, "songo" or epidemic hemorrhagic fever, whooping cough, diphtheria, pneumonia, erysipelas, epidemic cerebrospinal meningitis, venereal diseases, tuberculosis, salmonella, frostbites, and many more deadly viruses, germs, and bacteria. To observe the real-time effects of these harmful agents, these prisoners were often subject to vivisections without the use of anesthesia. In the case where a human experimental subject was exhausted from the experiments, they were to be killed one way or another. Some test subjects were handed potassium cyanide tablets, while others ingested porridge with heroin.
​
These "medical doctors" who performed routine human experiments were allowed to escape persecution, unlike their Nazi counterparts in Europe. This affair became infamously known as the elaborate American cover-up of war crimes, offering these perpetrators of crimes against humanity-- including Emperior Hirohito and Ishii Shiro--immunity in exchange for US access to Unit 731 research. Instead of punishment, many of these criminals were rewarded handsomely with great careers after the war, while thousands of Chinese families mourned their loved ones' lives which had lost at Unit 731 or dealt with the permeating consequences of sustaining a bacterial attack in their village.

Previous Section

Establishing Pingfan

Next Section

Vivisection at the Unit 731

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  • Home
    • About >
      • FAQ's - Frequently Asked Questions
    • Support Us >
      • Projects you can support! >
        • Distributing Books
        • Presenting at 112th Annual Meeting of Pacific Coast Branch
        • Summer Research Relocation Fund
    • Contact
  • Stories
    • Videos >
      • Black Hearts (2021)
    • Blog
    • Podcast: Forgotten History
  • Internship
    • Summer 2023 Internship
    • Fall 2022 Internship
    • Summer 2022 Internship
    • Summer 2021 Internship
    • Fall 2020- Spring 2021 Internship
    • Summer 2020 Internship
    • Fall 2019 Internship
    • Summer 2019 Internship >
      • Public History Night
    • School Year 2018-2019 Internship
    • Summer 2018 Internship >
      • 2018 Summer Showcase + Fundraiser
    • Fall 2017 Internship
    • Summer 2017 Internship >
      • 2017 Summer Showcase & Fundraiser
  • Books
  • Archives
  • Resource Page
    • Supplementary Research Guides >
      • Unit 731 - Guide >
        • Background of Biochemical Warfare Development
        • Imperial Japan's Chemical Warfare Development Program
        • Map of Unit 731
        • Personnel of Unit 731
        • Duties of Unit 731
        • Human Experimentation
        • [GRAPHIC] Germ Warfare Attacks
        • Cover Ups After the War
        • [OLD] Cover Ups After the War
      • Philippines' Resistance - Guide >
        • Philippines World War II Timeline
        • The Japanese Invasion & Conquest of the Philippines
        • Bataan Death March
        • Formation of Underground Philippines Resistance
        • Supplies of the Guerrilla Fighters
        • The Hukbalahap
        • Hunter's ROTC
        • Marking's Guerrillas
        • United States Army Forces in the Philippines of Northern Luzon (USAFIP-NL)
        • The Aetas
        • Chinese and Filipino-Chinese Nationalist Guerrilla Units
        • The Female Faces of the Philippine Guerrillas
      • Rising Sun Flag - Guide >
        • History of the Rising Sun Flag
        • Atrocities Committed Under the Flag
        • Rising Sun Flag in Pop Culture
      • Pinay Guerrilleras - Guide >
        • Japanese Occupation of the Philippine Islands: Pinays Answering the Call to Arms
        • The Fierce Heneralas and Kumanders of the Hukbalahap Guerrillas
        • Amazons of the Pacific Theater
        • Filipina American Veterans: Recovering the Extraordinary Feats of the Ordinary Pinays
        • The Legacy of the Asian Women Soldier
      • Fall of Singapore - Guide >
        • Singapore World War II Timeline
        • History of World War II in the Pacific
        • History of Singapore
        • Japan's Conquest in Asia
        • Japan's Invasion of the Malay Peninsula
        • Sook Ching Massacre
        • Double Tenth Incident
        • Social Changes and Challenges in Singapore
        • Voices from Syonan
        • Return to British Rule
      • Three Years and Eight Months - Guide >
        • Hong Kong before WW2
        • Buildup to World War 2
        • The Battle of Hong Kong
        • Life during 3 Years and 8 Months
        • East River Column Guerrilla Fighters
        • Prisoners of War Camps
        • End of Japanese Occupation
        • War Crimes Trials
      • Siamese Sovereignty - Guide >
        • The Land of Smiles
        • The Thai-Japanese Relationship
        • Phibun’s Domestic and International Policies
        • The Free Thai Resistance Movement
        • Post WW2 Aftermath of Thailand
      • The Khabarovsk War Crimes Trial - Guide >
        • Defendants of Khabarovsk War Crime
        • The Japanese Empire and USSR in WW2
        • The Employment of the Bacteriological Weapon in the War
        • Planning of Japan invasion to USSR
      • Unit 731 Cover-up : The Operation Paperclip of the East - Guide >
        • Establishing Manchukuo
        • The Development of Unit 731
        • Plan Kantokuen and Bacteriological Warfare
        • The Downfall of the Japanese WW2 Era
        • Three Stages of Interrogations
        • Lasting Impacts
      • Marutas of Unit 731 - Guide >
        • How did Ishii Shiro start unit 731?
        • A Beta Testing Site
        • Establishing Pingfan
        • Experiences at the Human Experimentation Complex
        • Vivisection at the Unit 731
        • Anta Testing Grounds
        • Overall Advance from the Laboratory Creations
        • The End of the War
      • Prince Konoe Memoir - Guide >
        • Who is Prince Konoe?
        • Preparation to Tripartite Pact
        • Emperor Hirohito and Prince Konoe
        • The End of Prince Konoe
      • Competing Empires in Burma - Guide >
        • What was the China-Burma-India Theater?
        • When did the China-Burma-India Theater Happen?
        • Who Fought in the China-Burma-India Theater?
        • The Second Sino Japanese War
        • Japan in the South
        • Operation U-Go
      • Battle of Shanghai - Guide >
        • The Battle of Shanghai. Background
        • Shanghai Before War
        • The First Battle of Shanghai 1932
        • Battle of Shanghai 1937
        • Aftermath of Battle for Shanghai
      • Ishi Shiro - Guide >
        • History of Biological Weapons and The Young Ishii Shiro
        • Establishment in Manchuria
        • Pingfang District - Harbin
        • Failures and Corruption
        • Post War
      • Taiwan The Israel of the East - Guide >
        • Background of Formosa
        • Industrialization of Japan
        • China During WWII
        • Taiwan under Kuomintang
        • New Taiwanese National Identity
      • Seeking Justice for Biological Warfare Victims of Unit 731 - Guide >
        • Introduction of Wang Xuan
        • Colonel Memorandum
        • The Beginning of Biological Warfare
        • The Bacteriological Warfare on China
        • Victims in Zhejiang’s Testimonies
        • After the War
      • Rice and Revolution - Guide >
        • The French Colonial Period
        • Anti-Colonial Resistance
        • The Rise of the Communist Movement
        • Imperial Japan’s Entry into Indochina
        • The Portents of Famine
        • The Famine (1944-45)
        • Legacy of the 1944-45 Vietnam Famine
      • Clash of Empires - Guide >
        • Japan’s Imperialist Origins
        • Japan’s Competition against the West: Nanshin-ron and Hokushin-ron
        • Japanese Imperialism Through the Lens of French Indochina
        • The U.S.-Japan Relations and the Pearl Harbor Attack
    • Lesson Plans >
      • Reparations
      • Ethics in Science
      • Writing the Narrative of a Pinay Fighter
      • Privilege Journal
      • Environmental Injustices
      • Female Guerrillas
      • Hunter's ROTC
      • Scientific Advancements
      • Seeking Justice: A Humanities Lesson Plan
      • The Hukbalahap
      • Trading Immunity
      • Bataan Death March
      • Biochemical Warfare Development
Contribute