He graduated from Nagoya Higher Commercial School (1918).
Soeta Shumpei served with Toyo Spinning Company and Toyota Spinning Company. Became factory superintendent of the newly established Chiio Spinning & Weaving Company (1930). He appointed director and chief of Labor Department (1935).
After the company was merged into Toyota Motorcar Company became its director (1943). Appointed director of Toyota Jido-shokki Seisakujo (Toyota Automatic Weaving Machinery Manufactory) (1944) and chief of Technical Department of the same company thereafter became managing director of Minsei Spinning Company (since 1950).