Japanese war crimes
The Empire of Japan committed numerous war crimes and crimes against humanity across various Asian, Pacific nations, notably during the Second Sino-Japanese War and the Pacific War. These incidents have been referred to as "the Asian Holocaust" and "Japan's Holocaust", and also as the "Rape of Asia". The crimes occurred during the early part of the Shōwa era, the reign of Emperor Hirohito. The Imperial Japanese Army (IJA) and the Imperial Japanese Navy (IJN) were responsible for war crimes which resulted in millions of deaths, ranging from sexual slavery and massacres to unethical human experimentation, torture, starvation, and forced labour.
Evidence of these crimes includes oral testimonies and written records such as diaries and war journals provided by Japanese veterans. The Tokyo Charter defines war crimes as "violations of the laws or customs of war," involving acts using prohibited weapons, violating battlefield norms while engaging with enemy combatants, or targeting protected persons including enemy civilians and citizens of neutral states. Military personnel from the Empire of Japan conducted a series of human rights abuses against civilians and prisoners of war throughout East Asia and the western Pacific region. These events reached their height during the Second Sino-Japanese War of 1937, 45 and the Asian and Pacific campaigns of World War II (1941, 45).
International law required signatories to adhere to specific treaties regarding warfare conduct. Japan signed the 1929 Geneva Convention on the Prisoners of War but declined to ratify it fully. In 1942, the government stated it would abide by terms mutatis mutandis, meaning changing what had to be changed. The Empire also violated international agreements like the Hague Conventions of 1899 and 1907 which contained provisions for prisoner treatment and banned chemical weapon use. Other violations included the 1930 Forced Labour Convention prohibiting forced labor and the 1921 International Convention for Suppression of Traffic in Women and Children banning human trafficking.
The Japanese government accepted terms set by the Potsdam Declaration after the war ended, including punishment for all war criminals who visited cruelties upon prisoners. However, domestic Japanese law does not define those convicted in post-1945 trials as criminals despite accepting trial judgments under the Treaty of San Francisco of 1952. Former Prime Minister Shinzō Abe advocated that while Japan accepted Tokyo tribunal verdicts as a condition for ending the war, these decisions hold no relation to domestic law.
Militarism, nationalism, imperialism, and racism created great bearings on conduct of armed forces before and during World War II. After Meiji Restoration and collapse of Tokugawa shogunate, Emperor became focus of military loyalty, nationalism, and racism. During Age of Imperialism late 19th century, Japan followed other world powers establishing colonial empire aggressively pursued objective unlike many major powers never ratifying Geneva Convention of 1929 covering prisoner treatment during WWII.
Domestic political repression played crucial role creating culture conducive to brutality. Scores of dissidents imprisoned tortured Special Higher Police including communists. Prisoners endured physical sexual torture leading cases murder most famous example Takiji Kobayashi Japanese Communist writer tortured death police custody circa 1933. By Attack Pearl Harbor organized dissent within Japan thoroughly crushed according Andrew Roth tracing origins militarist brutality toward Allies government treatment dissident home islands.
Richard H Mitchell categorized Fascist Japan paternalistic police state where State considered extended family government parent people children police nurses children policy authorities by 1930s reform political prisoners suspects released parole recanted beliefs reintegrated society contradictory methods procedure one example torture Kobayashi hours brutality interrogators extended hand benevolence ordering food eating suspects Maruyama Masao such contradictions extended Allied prisoners camp guards felt helping beating kicking simultaneously events 1930s 1940s rise militarism created superficial similarities wider Japanese military culture Nazi Germany.
Japan had military secret police force Kempeitai resembling Nazi Gestapo existed nearly decade Adolf Hitler own birth perceived failure insufficient devotion Emperor attracted punishment frequently physical kind officers assault beat men command pass beating lowest ranks POW camps meant prisoners received worst beatings partly belief punishments merely proper technique deal disobedience phenomenon gekokujō lower-ranking officers overthrowing assassinating superiors evidenced multiple coups assassinations carried mainland allowed proliferation war crimes commanders tried restrict atrocities face mutiny reassignment historians attributed war crimes lack supervision disorganization military without stronger control units effective court martial procedures allowed continue unpunished.
Estimated number people killed varies R. J. Rummel professor political science University Hawai'i estimates between 1937 and 1945 Japanese military murdered from nearly three over ten million people likely six million Chinese Indians Koreans Malays Indonesians Filipinos Indochinese including European American Australian prisoners war According Rummel democide due morally bankrupt political strategy military expediency custom national culture China alone 1937-1945 approximately 3.9 million Chinese killed direct result operations total 10.2 million Chinese killed course war British historian M.R.D Foot civilian deaths between 10 million 20 million Mark Felton claims up to 30 million people killed mostly civilians.
One major atrocity Nanjing Massacre 1937, 38 International Military Tribunal Far East findings Japanese Army massacred as many 260,000 civilians prisoners though some place figure high 350,000 Memorial Hall Victims Nanjing Massacre death figure 300,000 inscribed entrance early 1980s after conducting extensive interviews survivors reviewing existing records journalist Honda Katsuichi concluded violence perpetrated not isolated event part broader pattern atrocities Lower Yangtze region since Battle Shanghai Hosaka Akira army physician infantry battalion stationed China admitted following order murder civilians city Changzhou diary documenting atrocities supported various sources squad leader Kitayama confessed killing civilians 1987 Makihara Nobuo recorded Machine Gun Company followed orders indiscriminately kill all civilians town Second Sino-Japanese War called killing policy including killings minorities Hui Muslims Wan Lei Gaocheng county Hebei captured twenty Hui men set two younger free redemption buried alive eighteen Mengcun village killed more than 1,300 three years occupation desecrated destroyed mosques found filled dead bodies Nanjing Ji'e lane Mosque caretaker father Zhang his 60s decomposing corpse first washed Islamic custom buried Wutai mountain Donguashi Shen Xi'en helped bury 400 Hui bodies children women men.
Another massacre Parit Sulong Malaya Imperial Japanese Army massacred approximately five hundred prisoners higher estimates exist similar crime Changjiao massacre Southeast Asia Laha massacre deaths POWs Ambon Island Alexandra Hospital Singapore murdered hundreds wounded Allied soldiers innocent citizens medical staff Manila February 1945 resulted death 100,000 civilians occupied Philippines estimated one out every 20 Filipinos died hands Japan Lee Kuan Yew former Prime Minister stated between 50,000 and 90,000 casualties Lieutenant Colonel Hishakari Takafumi newspaper correspondent plan ultimately kill about 50,000 Chinese 25,000 already murdered received order scale operation other massacres Kalagon wartime Southeast Overseas European diaspora particular targets Sinophobic resentment historic expanse influence Chinese culture racist Pan-Asianism desire show colonial subjects impotence rulers executed Malay Sultans Kalimantan wiped elite Pontianak incidents Jesselton Revolt killed thousands native civilians nearly wiped Suluk Muslim population coastal islands Moro juramentado swordsman suicide attack against Japanese would massacre man entire family village.
Special military units conducted experiments on civilians POWs China purpose develop biological weapons used aggression. Unit 731 under Shirō Ishii victims subjected vivisection amputations anesthesia testing biological agents horse blood transfusions injection animal blood corpses Anesthesia not believed adversely affect results experiment former unit member testified symptoms observed prisoner taken cell dissection room strapped down screaming frightful doctor stuffed towel mouth quick slice scalpel opened Witnesses report victim usually lets horrible scream voice stops soon after International Symposium Crimes Bacteriological Warfare number people killed Imperial Army germ warfare human experiments around 580,000 Daniel Barenblatt Plague upon Humanity pages xii 173 Top officers Unit 731 prosecuted war crimes exchange turning research Allies reportedly given responsible positions Japan pharmaceutical industry medical schools health ministry.
Unit 731 most infamous facility scholars shown Japanese chemical biological warfare units Beijing Unit 1855 Nanjing Unit 1644 Canton Unit 1688 experimented subjects One case occurred Japan itself At least nine eleven members Lt Marvin Watkins' 29th Bomb Group crew survived crash U.S. Army Air Forces B-29 bomber Kyūshū the 5th of May 1945 commander separated sent Tokyo interrogation survivors anatomy department Kyushu University Fukuoka subjected vivisection killed Landas Marc Fallen True Story American POWs Wartime Atrocities Hoboken John Wiley 2004 In 1939 Unit launched periodic attacks military civilian targets contaminating wells intestinal pathogens distribution microbe-laced foods air drops plague inflected fleas aerial spray contaminants effectiveness hard assess casualties estimated high several hundred thousand killed Some physicians victims potassium cyanide dissected others chloroform Yoshio Onodera conducted experiments within Unit testified group conducted roughly 100-150 people murdered injecting chloroform the 11th of March 1948 thirty including doctors female nurse brought trial American tribunal Fukujiro Ishiyama doctor most responsible experimentation committed suicide before started Charges cannibalism dropped found guilty vivisection wrongful removal body parts Five sentenced death four life imprisonment rest shorter terms.
In China Japanese waged ruthless biological warfare against civilians soldiers aviators sprayed fleas carrying plague germs metropolitan areas creating bubonic epidemics used flasks diseases-causing microbes cholera dysentery typhoid anthrax paratyphoid contaminate rivers reservoirs houses mixed food deadly bacteria infect hungry children passed chocolate filled anthrax bacteria local Sheldon Harris Factories Death pages 77, 78 Final months World War Japan planned use plague weapon U.S. civilians San Diego Operation Cherry Blossoms Night hoping spread terror dissuade attacking plan set launch night the 22nd of September 1945 surrendered five weeks earlier Naomi Baumslag Murderous Medicine page 207 July 1989 mass grave over one hundred skeletons unearthed construction site Tokyo former location Army Medical College 1929 to 1945 Investigators determined bones belonged various ethnic Asian groups foreign origin indicated skulls discovered marked scalpels cut sword pierced bullets inferred military physicians conducted experiments brains battlefield evidence subsequently disposed buried location.
Japanese imperial forces employed widespread torture prisoners effort gather intelligence quickly tortured often later executed Uno Shintaro officer served China stated After atomic bombing Hiroshima secret police captured American P-51 fighter pilot Marcus McDilda discover how many bombs Allies future targets originally told captors knew nothing nuclear fission confessed under further torture United States had 100 atomic bombs Tokyo Kyoto next targets Many historians favorite technique simulated drowning water poured immobilized victim head suffocated lost consciousness resuscitated brutally usually torturer jumping abdomen expel subjected new session entire process repeated about twenty minutes.
Execution killing captured Allied airmen accordance official policy Battle Midway June 1943 three Americans shot down landed sea spotted Imperial Navy warships machinist mate first class Bruno Gaido Ensign Frank O'Flaherty tied five-gallon kerosene cans filled dumped Arashi third airman Wesley Osmus fatally wounded axe pushed stern August 13 Japan passed Enemy Airmen's Act stating pilots bombed non-military Pacific Theater subject trial punishment absence international law provisions aerial warfare legislation response Doolittle Raid April 18 Lieutenant Colonel James Doolittle commanded B-25 bombers bombed cities Eight Raiders captured landing China four months passage act brought kangaroo court Shanghai strafing civilians forbidden present defense despite lack legitimate evidence found guilty participating aerial operations Five sentences commuted life imprisonment other three taken cemetery outside executed firing squad October 14 contributed deaths hundreds throughout Pacific War estimated 132 Allied airmen shot bombing campaign against Japan 1944, 1945 summarily executed short trials drumhead courts-martial deliberately killed thirty-three American Fukuoka including fifteen beheaded shortly Government intention surrender announced August 15 Mobs civilians also killed several before military arrived custody Another ninety-four died causes while custody including fifty-two deliberately abandoned prison during bombing Tokyo the 24th of May 25.
Recent studies indicate number Chinese killed chemical warfare exceeded half million Throughout war China deployed poisonous irritating gases both personnel civilians League Nations denounced May 1938 Walter E Grunden history professor Bowling Green State University incorporated gas warfare many aspects army's war concluded forces unable retaliate kind utilization involved deploying specialized troops infantry artillery engineers air force units From 1937 to 1945 services used weapons over two thousand occasions primarily China Theater Operations Narashino Military Academy near Tokyo compiled fifty-six case studies detailing use lethal agents Yperite commonly known mustard gas document discovered National Archives Records Administration Japanese historian Yoshiaki Yoshimi Kentaro Awaya Second Sino-Japanese War sporadically used tear gas early 1938 Imperial Army resorted full-scale phosgene chlorine Lewisite nausea red mid-1939 mustard yellow Kuomintang Communist troops.
In 2004 Yoshimi Seiya Matsuno Emperor Hirohito signed orders specifying use chemicals China Battle Wuhan August October authorized toxic gas separate occasions despite Hague Declaration IV Declaration Projectiles Object Diffusion Asphyxiating Deleterious Gases Article 23 a 1907 Convention Laws Customs Land Resolution adopted League Nations condemned poison gas Japan Prince Mikasa member imperial family watched film showing gassing prisoners tied stakes Another incident occurred Battle Yichang October Artillery Regiment helped Brigade IJA 11th Army launching shells yellow red crowded civilians evacuate Some soldiers affected report stated effect considerable In 2004 published comprehensive study military poisonous gases Southeast Asia discovered battle Infantry Brigade detailed mustard major operation Eighth Route Shanxi Province winter unit noted severity attack commented anti-sentiment existed civilian population affected Cannibalism written reports testimonies collected Australian War Crimes Section Tokyo tribunal investigated prosecutor William Webb future Judge-in-Chief indicate personnel committed acts many parts Asia Pacific inspired ever-increasing Allied attacks supply lines death illness resulting hunger systematic activity conducted whole squads commanded officers Tanaka Hidden Horrors page 127 frequently involved murder purpose securing bodies British Indian Army POW Havildar Changdi Ram testified November 12 Kempeitai beheaded pilot saw cut flesh arms legs hips buttocks carry quarters fried small pieces.
In some cases flesh cut living people another Indian Lance Naik Hatam Ali later citizen Pakistan testified New Guinea Jemadar Abdul Latif 4/9 Jat Regiment rescued Sepik Bay 1945 Perhaps most senior officer convicted Lt Gen Yoshio Tachibana tried August relation execution U.S. Navy airmen cannibalization one during Chichijima Bonin Islands airmen executed orders sentenced death hanged Case No Trial General Tomoyuki Yamashita Supreme Court United States Judgments Delivered February Jeanie M Welch Without Hangman Rope Navy Trials International Journal Naval History volume Number April.
Since 1950s numerous apologies war crimes issued senior Japanese government officials criticized insincere Ministry Foreign Affairs acknowledged country role causing tremendous damage suffering before during World War particularly massacre rape civilians Nanjing IJA issue remains controversial members including former prime ministers Junichiro Koizumi Shinzō Abe paid respects Yasukuni Shrine honors all dead including Class A criminals Furthermore history textbooks provide brief references certain Liberal Democratic Party denied atrocities such as involvement abducting women serve comfort women euphemism sex slaves Definitions Tokyo Charter defines violations laws customs war acts using prohibited weapons violating battlefield norms engaging combatants protected persons enemy civilians citizens neutral states case attack Pearl Harbor.
Military personnel Empire convicted committing many acts period imperialism late 19th mid-20th centuries Events reached height Second Sino-Japanese War Asian Pacific campaigns WWII Japan signed Geneva Convention Prisoners Sick Wounded declined ratify POW convention stated abide terms mutatis mutandis changing changed Crimes fall aspects international law broke military subject court martial required law See example Wai Keng Kwok Justice Done Criminal Moral Responsibility Issues Chinese Massacres Trial Singapore Genocide Studies Program Working Paper Yale University page Access date April International agreements violated Hague Conventions Forced Labour Convention Suppression Traffic Women Children Kellogg-Briand Pact rendering actions liable charges peace introduced Trials prosecute Class war criminals Class B found guilty crimes per se Class C humanity accepted Potsdam Declaration provision Article punishment visited cruelties prisoners Japanese law does not define those convicted post-trials criminals despite governments accepting judgments Treaty San Francisco former Prime Minister advocated position accepted tribunal verdicts condition ending war relations domestic law.
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Common questions
What specific war crimes did the Empire of Japan commit during World War II?
The Empire of Japan committed numerous war crimes including sexual slavery, massacres, unethical human experimentation, torture, starvation, and forced labour. These acts resulted in millions of deaths across Asian and Pacific nations from 1937 to 1945.
When did the Japanese government sign the Geneva Convention on Prisoners of War?
Japan signed the 1929 Geneva Convention on the Prisoners of War but declined to ratify it fully. The government stated in 1942 that it would abide by terms mutatis mutandis while violating other international agreements like the Hague Conventions of 1899 and 1907.
Who was responsible for Unit 731 biological warfare experiments in China?
Unit 731 under Shirō Ishii conducted experiments on civilians and prisoners of war to develop biological weapons. Victims were subjected to vivisection without anesthesia and exposure to plague germs between 1937 and 1945.
How many people died in the Nanjing Massacre according to official records?
The Memorial Hall of Victims of the Nanjing Massacre inscribed a death figure of 300,000 at its entrance in the early 1980s after conducting extensive interviews with survivors. International Military Tribunal Far East findings state the Japanese Army massacred as many as 260,000 civilians and prisoners during 1937 and 1938.
What date did the United States surrender five weeks before Operation Cherry Blossoms Night was set to launch?
Operation Cherry Blossoms Night was planned to launch on the 22nd of September 1945 but Japan surrendered five weeks earlier on August 15. The plan involved using plague weapons against U.S. civilians in San Diego to spread terror.