Research Summary

My research focuses on high voltage and discharge phenomena. High voltage engineering is a fundamental technology for electric power systems, which are social infrastructure. In recent years, electric power systems are undergoing a period of great technical and institutional change with the massive introduction of renewable energy and distributed power sources, high ageing of existing equipment, and the separation of power transmission and distribution. We are conducting research related to high-voltage insulation and current interruption technology for the development of high-voltage DC transmission networks and the upgrading of existing AC transmission networks. We use optical technology for discharge measurement, information technology for simulation, and even chemistry to elucidate the properties of insulating materials and to design materials. We believe that this is a field in which students can learn a wide range of fundamentals and apply them in society.

Laboratory Website

https://www.hvg.t.u-tokyo.ac.jp/

Biography

1999
Dr. Degree from the University of Tokyo, Japan
1999 - 2001
Research Associate at the Dept. of Advanced Energy, School of Engineering, The University of Tokyo
2001 - 2003
Researcher at R & D Center, Tokyo Electric Power Company Ltd.
2003 - 2004
Lecturer at the Dept. of Electrical Engineering, School of Engineering, The University of Tokyo
2004 - 2017
Associate Professor at the Dept. of Electrical Eng. and Information Systems, School of Engineering, The University of Tokyo
2017 -
Professor at the Dept. of Electrical Engineering and Information Systems, School of Engineering, The University of Tokyo
2020, 2022
Special Advisor to the Dean of the school of Engineering at the University of Tokyo
2023 - 2025
Vice Dean of the school of Engineering at the University of Tokyo

Major Awards

• Best Paper Award, The Institute of Electrical Engineers of Japan (2022, 2016, 2007, 2000)
• The Institute of Electrical Engineers of Japan, Award for Advancement of Electricity (2021, 2015, 2004)
• ISDEIV2018　Best Paper Award Japan Award
• CIGRE2018　 BestSession Papers in Cigre Science & Engineering

Selected Publications

• Takenao Sato, Takahiro Umemoto, Masahiro Sato, Takashi Fujii, Akiko Kumada - Show less: Phase-resolved measurement of electric-field-induced second harmonics and its application to noninvasive electric field sensing, Plasma Sources Science and Technology, 34, 105019 (13pp), https://doi.org/10.1088/1361-6595/ae1059,  (2025)
• Weihao Wang, Hajime Shimakawa, Bo Jie, Masahiro Sato, Akiko Kumada: Be-LSTM: An LSTM-Based Framework for Feature Selection and Building Electricity Consumption Prediction on Small Datasets, Journal of Building Engineering, online,  https://doi.org/10.1016/j.jobe.2025.111910, (2025-5)
• Shin Nakamura, Masataka Sogame, Masahiro Sato, Takashi Fujii, and Akiko Kumada: Electric field measurement in DC corona discharge in atmospheric pressure air using E-FISHG and laser-triggering methods, Plasma Sources Science and Technology, Vol.33, 055010,  https://doi.org/10.1088/1361-6595/ad4670, (2024-5)
• H. Shimakawa, A. Kumada, and M. Sato: Extrapolative prediction of small-data molecular property using quantum mechanics-assisted machine learning, npj Computational Materials, Vol.10, No.11, https://doi.org/10.1038/s41524-023-01194-2, (2024-1)
• M. Sato, A. Kumada and K. Hidaka: Atomistic Modeling of Charge Injection Into Dielectric Polymers, IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 30, No.6, pp.2673 - 2678, https://doi.org/10.1109/TDEI.2023.3324894, (2023-11)
• S. Nakamura, M. Sato, T. Fujii, A. Kumada and Y. Oishi: Electric-field-profile measurement along a probing laser path based on electric-field-induced second-harmonic generation, Physical Review A, Vol. 104, Issue 5, p. 053511 44501 (2022)
• H. Suzuki, H. Shimakawa, A. Kumada, M. Sato: Molecular Dynamics Study of Ionic Conduction in Epoxy Resin, IEEE Transactions on Dielectrics and Electrical Insulation, Vol.29 No.1, pp.170-177 44593 (2022)