Bachelor of Engineering, Kyoto University, 1981. M of Engineering, Kyoto University, 1983. D of Engineering, Kyoto University, 1986.
Instructor Kyoto University, 1986—1988, Kanazawa University, Japan, 1988—1993, associate professor Japan, 1993—1997, Kobe University, Japan, 1997—2005, professor, since 2005. Visiting research fellow University Colorado, Boulder, 1990—1991. Visiting associate professor Asian Institute of Technology, Bangkok, 1993, Virginia Polytechnic Institute, Blackburg, 1996.
Member of American Society of Civil Engineers, Society of Vegetation Science, Japanese Geotechnical Society, Japan Society of Civil Engineers.
Married Noriko Iizuka, January 2, 1962. Children: Satoru, Makoto.