Watch full movie online. Japanese imperialism launched the September 18th Incident in China, and the criminal guns and guns were stained with the blood of the Chinese people. Simultaneously with the armed aggression, a bacteriological unit code-named 731 was established along the Su-Manchu border. They inhumanly used the Chinese, Koreans, and Soviets to carry out brutal experiments on living bodies, and committed horrific brutality in concentration camps, occupied areas, and prisoner-of-war camps; massacres, perverted adultery and humiliation, poison gas and bacteria experiments , sex experiments, etc...