Hirokazu Kato is a Professor at Nara Institute of Science and Technology (NAIST), Japan. He received his Dr. Eng. degree from Osaka University in Japan in 1996. He joined the Faculty of Engineering Science at Osaka University from 1989 to 1999. In 1999, he joined the Faculty of Information Sciences at Hiroshima City University in Japan. In 2003, he joined the Graduate School of Engineering Science at Osaka University. Since 2007, he has been with the Graduate School of Information Science at NAIST. He received the Virtual Reality Technical Achievement Award from IEEE VGTC in 2009.