After he studied abroad at Humboldt University of Berlin, and worked as a professor of the first course for internal medicine in Medical College at Tokyo University, which was known as 'Aoyama Internal Medicine'; he also held posts as president of Medical College at Tokyo Imperial University and head of the Institute of Infectious Disease (present the Institute of Medical Science of the University of Tokyo).
ベルリン大学留学等を経て、東京大学医科大学校内科学第一講座（青山内科として君臨）教授、東京帝国大医科大学校長、伝染病研究所（現東京大学医科学研究所）所長等を歴任。