EDUCATIONGraduated from University of Tokyo in March, 1990, with the degree of Bachelor of Engineering. Obtained a Master of Engineering in March, 1992. Received a Doctor of Engineering in March, 1997 from University of Tokyo for a thesis entitled: OCCUPATION: Research assistant of Tokyo Institute of Technology, from April, 1993, to March, 1995. Research Fellow of the Japan Society for the Promotion of Science, from April, 1997 to February, 1999. Visiting Researcher of Laboratoire 3S, Grenoble, France, from September, 1997 to August, 1998. Assistant Professor of Institute of Engineering Mechanics and Systems, University of Tsukuba from February, 1999. Visiting Researcher of Department of Civil and Environmental Engineering, University of Massachusetts, Amherst, USA, from December, 2000 to August, 2001. Associate Professor of Institute of Engineering Mechanics and Systems, University of Tsukuba from July, 2002 to present.Visiting scholar of Cavendish Laboratory, University of Cambridge, UK, from August, 2011 to August, 2012 (with the grant for the international exchange of scientist by the Kajima foundation)RESEARCH FIELDS:Granular physics (Micromechanics of granular materials)Geotechnical and earthquake engineeringEarth and planetary science

• 1. Introduction: Geological materials2. Basic properties of grains and their packing3. Basic mechanical behaviour of granular materials4. Grain comminution5. Grain transformation and abrasion6. Sedimentation and packing structure7. Caking: formation of sedimentary rocks8. Summary: Evolution and critical state of geological materials