Koreans , along with many other Asians , were experimented on in Unit 731 , a secret military medical experimentation unit in World War II . The victims who died in the camp included at least 25 victims from the former Soviet Union and Korea . General Shiro Ishii , the head of Unit 731 , revealed during the Tokyo War Crime Trials that 254 Koreans were killed in Unit 731 . Some historians estimate up to 250,000 total people were subjected to human experiments . A Unit 731 veteran attested that most that were experimented on were Chinese , Koreans and Mongolians
Unit 731
Unit 731
Korea under Japanese rule