is affiliated with the National Institute of Advanced Industrial Science and Technology, Japan. Previously he was involved in the research of GaN and SiC power devices at the Central Research Laboratory, Hitachi Ltd., Tokyo, Japan. He is a senior member of IEEE and a member of the Japan Society of Applied Physics. He is also a lecturer at the University of Electro-Communications, Tokyo, Japan and Hosei University, Tokyo, Japan. He received his B.S., M.S., and Ph.D. in electronic engineering from the University of Tokyo, Japan.