He received the B.E., M.E., and Dr. of Engineering, in 1993, 1995, 1998 respectively from the University of Tokyo. In 1998, he joined the Australian National University as a research fellow, where he developed a real-time vision system for gaze measurement. In 1999 he joined the Graduate School of Information Science, Nara Institute of Science and Technology. His research interests include real-time vision processing technology in real-world which can be applied to robotics and human interfaces.