Bachelor of Science, Tokyo University, 1978. Master of Science, Tokyo University, 1980. Doctor in Natural Science, Innsbruck University, Austria, 1982.
Environmental specialist Overseas Economic Cooperative Fund, Chiyodaku, 1991—1993. Deputy director Environment Agency, 1993—1995. Associate professor Kyushu University, Fukuoka, Japan, 1995—1999.
Professor Ritsumeikan University, Kusatsu, Japan, 1999—2003, Hosei University, Tokyo, since 2003. Director International Lake Environment Committee, Kusatsu, Shiga, Japan, since 2001.
Married Manami Masuda, December 1980. 1 child Kai.