Ogata Tomosaburo graduated from the Medical Department, Tokyo University (1908).
Ogata Tomosaburo became instructor and assistant professor (1914) of his alma mater and visited Europe and America several times. Received his doctorate (1915) and became a professor (1923) of his alma mater. Retired under age limit (1943). A specialist in pathological anatomy, he was given an Academy prize for his research in tumors and vitamin deficiency disease.