2000.11.01 - 2003.09.30, Graduate School of Engineering, Associate Professor 2003.10.01 - 2005.03.31, Graduate School of Engineering, Associate Professor 2005.04.01 - 2007.03.31, Science and Technology Center for Atoms,Molecules and Ions Control, Graduate School of Engineering, Associate Professor 2007.04.01 - , Department of Mechanical Science and Bioengineering, Graduate School of Engineering Science, Professor 2007.10.01 - , Global Collaboration Center, Professor 2008.04.01 - 2010.03.31, International Student Center, Professor 2009.04.01 - 2011.03.31, Institute for Higher Education Research and Practice 2010.04.01 - , Center for International Education and Exchange, Professor