Mr. Ishizuka was appointed Chairman of the New Energy and Industrial Technology Development Organization (NEDO) by the Minister of Economy, Trade and Industry in 2018. NEDO is a national research and development agency that creates innovation by promoting technological development necessary for the realization of a sustainable society.

Prior to his current position, he served as Member of the Board, President and Chief Executive Officer at Mitsubishi Chemical Corporation from 2012. He also served to lead various public organizations such as The Society of Polymer Science, the Japan Institute of Invention and Innovation, The Dia Foundation for Research on Ageing Societies, the Japan BioPlastics Association, the Japan Association for Chemical Innovation, The Japan Plastics Industry Federation, the Keidanren (Japan Business Federation) Committee on Europe, the Plastic Waste Management Institute, and the Japan Hygienic Olefin and Styrene Plastics Association during his business carrier.

Mr. Ishizuka joined Mitsubishi Chemical Industries Limited (currently known as Mitsubishi Chemical Corporation) after graduating from the Department of Chemistry in the School of Science at The University of Tokyo.