In 1942 , he was appointed the second commander of Unit 731 . His predecessor was Shiro Ishii . In April 1945 , he was promoted to lieutenant surgeon general and appointed commander of the 13th Army Medical Corps . After the Japanese surrender in August 1945 , he was detained in a POW camp in Shanghai . Like all involved with Unit 731 or Japanese biological warfare , he was repatriated to Japan in January 1946
Unit 731
Unit 731
Masaji Kitano