A chilling report from a 1940 Imperial Japanese Army medical meeting has resurfaced, providing gruesome details of human experimentation during the Second Sino-Japanese War. The document, recently publicized by Japanese and Chinese researchers, reveals that military surgeons injected animal blood into human subjects to observe biological reactions and potential applications for battlefield medicine.
The report specifies that these experiments took place in the autumn of 1938 and involved 23 unidentified victims. In one particularly harrowing series of tests, horse blood was administered to patients who were already in critical condition following severe blood loss. In other instances, chicken blood was injected into humans to track the duration of its presence within the human circulatory system.
Predictably, the results were catastrophic for the subjects, who suffered from high fevers and other symptoms of severe systemic shock. These revelations underscore a profound breach of medical ethics that was systemic within the Japanese military hierarchy. While many such records were incinerated in the closing days of World War II, this particular account survived within an internal publication of the Imperial Japanese Army Medical Corps.
The disclosure of these documents by Japan’s Kyodo News and the Unit 731 Museum reflects an ongoing, arduous effort to reconcile with a history of state-sponsored atrocities. For decades, the full scale of Japan's biological and chemical warfare research has been obscured by a combination of evidence destruction and Cold War-era geopolitical shielding. These new findings suggest that the scope of such experimentation was even more widespread than previously documented.
Historical scholars and advocates for justice are now calling for a more thorough reflection from the Japanese government regarding these war crimes. The discovery of the medical corps’ own records serves as an irrefutable link between the military establishment and the inhumane treatment of prisoners and civilians in occupied China. As more archival material comes to light, the pressure for a formal, comprehensive acknowledgment of these specific atrocities continues to mount.