received B.E., M.E., and D.E. degrees in Information Engineering all from Niigata University, in 1994, 1995, and 1998, respectively. In his theses research, he was engaged in radar polarimetry and polarimetric radar sensing of buried objects. He was with Fujitsu System Integration Laboratories Ltd from 1998 to 2003, the National Institute of Information and Communications Technology, Japan (NICT) from 2003 to 2005, and the Earth Observation Research and Application Center (EORC), Japan Aerospace and Exploration Agency (JAXA) in 2006, respectively. He is now an assistant professor at Nagasaki University. He is involved in research activities in collaboration with ELEDIA Research Center, and he is the Director of the ELEDIA@UniNAGA. His interests are in inverse scattering, radar polarimetry, microwave remote sensing, and wireless sensor networks.