Unit 731, a secret biological and medical experimentation unit of the Imperial Japanese Army during World War II, conducted horrific experiments on unsuspecting prisoners, including civilians and military personnel, primarily in China. Many of its victims did not survive the brutal experiments, which included vivisection, exposure to extreme temperatures, and the release of pathogens.
However, there were some survivors from Unit 731's experiments. A few individuals were able to endure the conditions and later escape or were liberated after the war. The exact number of survivors is not well-documented, and many who survived were likely traumatized and have remained silent about their experiences.
It is also important to note that the actions of Unit 731 were largely shielded from public scrutiny for many years, and those responsible for these war crimes were not held accountable until much later. Some members received immunity in exchange for their research findings, further complicating the legacy of Unit 731 and its victims.