In 1972, he designed a solar-heated house for his family, which attracted public attention after the oil crisis of 1973.
He has also enjoyed a long career in academia, and has authored a variety of publications.
Then he joined the Solar Energy Project, and, from 1960–62, he worked as a research assistant at the Massachusetts Institute of Technology (MIT) through the Fulbright Program, with Prof. Lawrence B. Anderson as his adviser.
There he worked on developing the use of computers in environmental engineering, particularly in relation to regulating buildings' heating and cooling loads.
At that point, he left the Department of Architecture and became a professor at Waseda's Advanced Research Institute for Science and Engineering.