**Motoichi Ohtsu**

Motoichi Ohtsu (Director-in-chief of the Research Origin for Dressed Photon; Professor Emeritus, University of Tokyo and Tokyo Institute of Technology) received his Dr. Eng. Degree from the Tokyo Institute of Technology, Tokyo, in 1978. He was first appointed as a research associate, then an associate professor in 1982. From 1986 to 1987, while on leave from the Tokyo Institute of Technology, he joined the Crawford Hill Laboratory, AT&T Bell Laboratories, Holmdel, New Jersey, USA. In 1991, he became a professor at the Tokyo Institute of Technology. In 2004, he moved to the University of Tokyo as a professor. He has been the leader of the "Photon Control" project (1993–1998: the Kanawaga Academy of Science and Technology, Kanagawa, Japan), the "Localized Photon" project (1998–2003: ERATO, JST, Japan), the "Terabyte Optical Storage Technology" project (2002–2006: NEDO, Japan), the Near Field Optical Lithography System" project (2004–2006: Ministry of Education, Japan), the "Nanophotonics" team (2003–2009: SORST, JST, Japan), the "Innovative Nanophotonics Components Development" project (2006–2011: NEDO, Japan), the "Nanophotonics Total Expansion: Industry-University Cooperation and Human Resource Development" project (2006–2011: NEDO, Japan), and the "Development of a solar cell technology using dressed photons" project (2012–2014, NEDO, Japan).

Dr. Ohtsu has written over 588 papers and received 83 patents. He is the author, co-author, and editor of 85 books, including 46 in English. In 2000, He was appointed as President of the IEEE LEOS Japan Chapter. From 2000, he has been an executive director of the Japan Society of Applied Physics. His main fields of interests are off-shell science and dressed photon technology. He is a fellow of the Optical Society of America. He is also a fellow and life member of the Japanese society of Applied Physics. He is a member of the American Physical Society and the Laser Society of Japan. He has been awarded 21 prizes from academic institutions, including the Issac Koga Gold Medal of URSI in 1984; the Japan IBM Science Award in 1988; two awards from the Japan Society of Applied Physics in 1982 and 1990; the Inoue Science Foundation Award in 1999; the Japan Royal Medal with Purple Ribbon from the Japanese Government in 2004; the H. Inoue Award From JST in 2005; the Distinguished Achievement Award from the Institute of Electronics, Information and Communication, Engineering of Japan in 2007; the Julius Springer Prize for Applied Physics in 2009; the Okawa Publications Prize in 2016; and the IAAM Medal from the International Association of Advanced Materials in 2018.

He served as the committee member of 18 international conferences, including the Chair of the Executive Committee, the German–Japanese Symposium on Nanophotonics; the Chair of the Executive Committee, The US–Japan Symposium on Nanophotonics; the Chair of the Program Committee, the International Near-Field Optics Conference; the Chair of the Organizing Committee, the Asia-Pacific Near Field Optics Workshop; and the Chair of the Program Committee, the Pacific Rim Conference on Lasers and Electro-Optics.
