He served as a professor at the Faculty of Engineering, Tokyo University of Science, and the Graduate School of Keio University. He then served as a professor at the Faculty of Business Administration, Mejiro University, and is currently a visiting professor at the Institute of Statistical Mathematics, where he continues his research and education in data science. His research includes proposing a new design paradigm, "super-design," in the field of engineering, and new analytical methods, such as two-sided causal analysis and virtual experiments, in the field of social science. While studying his specialty, during his graduate studies, he developed theories for competitive skiing (primarily slalom and giant slalom) and provided practical instruction for a university ski club for several years, publishing the results of these efforts in a book on competitive skiing theory. Building on this experience, he has taught active data science, a practical exercise-based statistical education, at universities, graduate schools, companies, and various seminars for nearly half a century. During his sabbatical, he furthered his research on super-design at Yale University in the United States and developed a prototype teaching material, an assembled paper biplane helicopter. The former is the main theme of his research, while the latter is a fully-fledged, prototype teaching material capable of handling over a dozen variables (factors) and quadratic models. In addition, we have developed paper gliders as highly advanced real-life teaching materials and coin shooting as a general-purpose real-life teaching material aimed at beginners to experts.
