Junpei Tsuji graduated with an M.S. in Catalysis Chemistry from Hokkaido University. In April 1994, he joined Sumitomo Chemical Co., Ltd. and worked at its Petrochemicals Research Laboratory. His experience includes several positions in the Petrochemicals Research Laboratory and the Planning & Coordination Office in Petrochemicals & Plastics Sector, including work on the Rabigh Project between 2007-2009. He became General Manager of the Planning and Coordination Office in the Petrochemicals & Plastic Section in 2013, and held the equivalent position in the Energy & Functional Materials Sector in 2015. In 2020, he became Associate Officer and General Manager of the Research Planning and Coordination Dept. He became Secretary-General of the Carbon Neutral Strategy Council in 2021, and became Executive Officer, in addition to Secretary-General of the Carbon Neutral Strategy Council, and General Manager of Research Planning and Coordination Dept., in 2022.