He received a PhD in Computer Science from the Tokyo Institute of Technology in 2008. His research concerns characterizing changes in behavior following virtual reality-based rehabilitation/assessment for cognitive and motor disorders. Takehiko Yamaguchi is an assistant professor at department of applied electronics, Tokyo University of Science, Japan. He received a PhD in Computer Science from the Tokyo Institute of Technology in 2008. His research concerns characterizing changes in behavior following virtual reality-based rehabilitation/assessment for cognitive and motor disorders.