1977, Bachelor's, 1979, Master's and 1983, PhD, University of Tokyo. With University of Tokyo: 1981, Department of Urban Engineering; 1987-89, seconded to Asian Institute of Technology, Thailand by Japanese government; 1995, Professor; 2003-07, Director, Environmental Science Centre; research and development in advanced treatment and reclamation technologies, including membrane technology, hydrothermal water technology for decentralized water and waste management system in urban area. Visiting Professor, Institute of Statistical Mathematics, Japan. President, Japan Society of Material Cycles and Waste Management, Chief Director, Japan Association of Container and Packaging Recycling. Recipient of Sidney Loeb Award, European Desalination Society, for invention of submerged membrane bioreactor concept (2008).