Born at Tokyo in 1959. Graduated doctor course in computer engineering of Graduate School of The University of Tokyo in 1986. Entered Electrotechnical Laboratoy in 1986. Professor of The Future University in 2000. Professor of The University of Tokyo in 2020. From 2014 to 2016 the president of Japanese Society of Artificial Intelligence. From 2022 to now the vice president of Information Procsssing Society of Japan.