received the B.E. degree from the University of Electro-Communications, Tokyo, Japan in 1990.
He received the M.E. and Ph.D. degrees in communications engineering both from Osaka University, Osaka, Japan in 1992 and 1998, respectively. Since 1993, he worked at Osaka University as an assistant professor. He moved to Nara Institute of Science and Technology in 2000 as an associate professor. He is now a professor at the same institute. He is a member of IEEE, IEICE and ITEJ.