Background
Tatsuo Osumi was born in 1894 in Tokyo, Japan.
Tatsuo Osumi was born in 1894 in Tokyo, Japan.
He graduated from Tokyo Higher Commercial School in 1916.
He entered Mitsubishi Soko Kaisha and became its director (1944), managing director (1947) and then president. He was appointed counselor of Homu-cho (Attorney General's Office) (1948) and member of Rohan Shingikai (Judicial Judgment Committee) (1949).