Doctor of Medicine, Tokyo University, 1983. Doctor of Philosophy, Tokyo University, 1992.
Resident Tokyo University, 1983-1985, instructor, 1988-1990, assistant professor, 1993-1999, associate professor, 1999—2007. Professor.2007, since 2007. Resident Takeda General Hospital, Fukushima, Japan, 1985-1986.
Division head Hitachi General Hospital, Tokyo, 1987-1988, Kameda General Hospital, Chiba, Japan, 1991-1993.
Member Association for Research in Otolaryngology, Equilibrium Society Japan, Prosper Meniere Society.
Married Keiko Yamasoba, October 10, 1984. 2 children.