His research interests include ultrafast electronics and millimeter-wave and terahertz photonics.,Dr. Nagatsuma is a Fellow of the Institute of Electronics, Information and Communication Engineers (IEICE), Japan, and a Fellow of the Electromagnetics Academy. He is currently an Associate Editor for IEEE Transactions Terahertz Science and Technology, and a President of the Terahertz Systems Consortium and a Past-Vice President of the IEICE. He was the recipient of numerous awards, including the 1989 IEICE Young Engineers Award, 1992 IEEE Andrew R. Chi Best Paper Award, 1997 Okochi Memorial Award, 1998 Japan Microwave Prize, 2000 Ministers Award of the Science and Technology Agency, 2002 and 2011 Asia–Pacific Microwave Conference Prize, 2004 YRP (Yokosuka Research Park) Award, 2006 Asia–Pacific Microwave Photonics Conference Award, 2006 European Microwave Conference Prize, 2007 Achievement Award presented by the IEICE, 2008 Maejima Award, 2011 Recognition from Kinki Bureau of Telecommunications, Ministry of Internal Affairs and Communications, 2011 Commendation for Science and Technology by the Ministry of Education, Culture, Sports, Science and Technology, 2014 IEEE Tatsuo Ito Award, and 2020 Distinguished Achievement and Contributions Award by the IEICE.