BRIEF HISTORY 2004: Ph.D., Institute of Applied Physics, University of Tsukuba, Japan.2004-now Research Associate(-2007) and Associate Professor(2007-), Tokyo University of Sciece, Japan. MAIN RESEARCH SUBJECTS Fabrication of thin film solar cells (CIGS, SnS, CTS, Cu2O etc.); crystal growth and characterization of several semiconductors (chalcogenide and oxide) and transparent conducting oxides (ZnO, ITO, IZO, NiO etc.); and material science and engineering of semiconductors.