Born in Koshigaya, Saitama on 17 June 1961.

1974-1977 Kaisei Junior High School.

1977-1980 Kaisei High School.

1980-1984 Dept of Naval Architecture, Faculty of Engineering, University of Tokyo.

B.Eng. from University of Tokyo in 1984

1984-1986 Dept of Naval Architecture, Postgraduate School of Engineering, University of Tokyo.

M.Eng. from University of Tokyo in 1986

1986-1996 Research Engineer at Bridgestone Corporation.

1990-1993 Dept of Chemical Engineering and Chemical Technology, Imperial College, London.

Ph.D. from University of London in 1993

1996-2004 Associate Professor at Department of Environmental and Ocean Engineering, School of Engineering, University of Tokyo.

2004-2007 Professor at Department of Environment Systems, School of Frontier Sciences, University of Tokyo.

2008-now Professor at Department of Ocean Technology, Policy, and Environment, School of Frontier Sciences, University of Tokyo.