Bachelor's degree, Tokyo Institute of Technology, 1946. Doctor in Engineering, Kyoto University, 1961.
Research assistant, Tokyo (Japan) Institute Technology, 1946-1955; assistant professor, Musashi Institute Technology, Tokyo, 1955-1960; professor, Musashi Institute Technology, Tokyo, 1960-1989; president, Musashi Institute Technology, Tokyo, 1989-1998; professor emeritus, Musashi Institute Technology, Tokyo, since 1998. Chairman Japanese Committee of International Standards Organisation/Technology committee 197, Tokyo, since 1992.
Committee member World Hydrogen Energy Network Project Subtask 1, Tokyo, 1994. Fellow Society Automotive Engineers, Japan Society Mechanical Engineers (board directors 1987-1988), Hydrogen Energy Systems Society (president 1987-1998), International Association Hydrogen Energy (directive board member since 1994). Member American Society of Mechanical Engineers (life, Soichiro Honda medal 1985, Calvin W. Rice Lecture award 1995).
Married Mitsuko Iimuro, May 5, 1950. 1 child, Kokichi.