Yes, there were survivors of Unit 731, which was a secret Japanese military unit during World War II known for conducting inhumane medical experiments on humans, including prisoners of war, civilians, and others. After the war, some members of Unit 731 were able to evade prosecution for their actions, and a few even lived relatively normal lives in Japan and elsewhere.
While many individuals involved in the unit were not held accountable for their crimes, some survivors of the experiments—often referred to as "victims"—shared their stories and experiences after the war. However, details about these individuals and their fates vary, and some may have faced significant stigma and trauma related to their experiences.
The legacy of Unit 731 remains a sensitive and controversial topic in Japan and among historians studying wartime atrocities.