He was a YSSP participant in 2000 in IIASA’s Dynamic Systems Program. In 2002 he contributed, with three co-authors, a chapter “Inter-Firm Technology Spillover and the ‘Virtuous Cycle’ of Photovoltaic Development in Japan,” to the book Technological Change and the Environment, edited by Grübler and Nakicenovic of IIASA and Nordhaus of Yale. Dr. Nagamatsu now works in the Production Engineering Research Laboratory of Hit achi. He began his affiliation with Hitachi in 2002 and has carried out wide-ranging research in the field of business administration, quality management, and project management.