Hideyuki Kawashima received Ph.D from Keio University at 2004. From 2004 to 2007, he was an assistant professor in the department of information and computer science, Keio University. From 2007 to now, he has been an assistant professor both in the graduate school of systems and information engineering and center for computational sciences, University of Tsukuba. His research interest lies in real time data processing, stream data processing, sensor data management.