Doctor of Medicine, Sapporo Medical University, 1980; Doctor of Philosophy, Sapporo Medical University, 1985.
Staff pediatrician Hokkaido Children's Hospital, 1985—1986. Postdoctoral fellow McGill University, Montreal, Canada, 1986-1989, Adjunct Professor, 1994—2004. Senior Lecturer Sapporo Medical University, 1990—1993, Assistant Professor, 1993—2004, Associate Professor, 2004.
Chief measles laboratory virology III National Institute Infectious Diseases, Tokyo, 2004-2008. Head Regional Reformed Laboratory and Global Specialized Laboratory World Health Organization, 2005-2008, Professor & Chair, International University of Health and Welfare Graduate School, since 2008.
Member American Society Microbiology, New York Academy of Sciences.
Son of Kazuji and Fumi (Otsuka) N. Married Asako Muragishi, April 7, 1985. Children: Eu, Ryo, Ken.