PEAK Staff Profile

Masakazu Sugiyama, MA (The University of Tokyo)
Professor – Environmental Sciences

Contact : sugiyama[at]


Prof. Sugiyama

Masakazu Sugiyama is the director and a professor at Research Center for Advanced Science and Technology (RCAST), The University of Tokyo. He received the B.E., M.S., and Ph.D. degrees in Chemical Systems Engineering, all from the University of Tokyo, Japan, in 1995, 1997, and 2000, respectively. In 2000, he became a Research Associate at the Department of Chemical System Engineering, the University of Tokyo. In 2002, he joined the Department of Electronic Engineering as a Lecturer. He became an Associate Professor in 2005. In 2016, he was promoted to a full professor and then moved to RCAST in 2017.

Research Interests

  • High-efficiency photovoltaic
  • Hydrogen energy systems
  • CO2 utilization based on electrochemistry
  • Energy transition scenario for carbon neutrality.

Selected Publications


  1. M. Sugiyama, K. Fujii and S. Nakamura (eds.), “Solar to Chemical Energy Conversion — Theory and Applications —,” Springer, ISSN 2195-1284 (2016).

International Journals

  1. S. Yamaguchi, K. Watanabe, T. Minegishi, M. Sugiyama, "Solar to hydrogen efficiency of 28.2% under natural sunlight achieved by a combination of five-junction concentrator photovoltaic modules and electrolysis cells", Sustainable Energy & Fuels, 7, 6, 1377-1381 (2023)
  2. M. Asami, K. Watanabe, R. Yokota, Y. Nakano, M. Sugiyama, “Comparison of Various Voltage Metrics for the Evaluation of the Nonradiative Voltage Loss in Quantum-Structure Solar Cells,” IEEE. J. Photovoltaic., 13, 95-104 (2023).
  3. T. Endo, T. Minegishi, S. Shizumi, M. Sugiyama, "Ambient Sensitive Charge Transfer from GaN to Pt during a Photocatalytic Reaction," The Journal of Physical Chemistry Letters, 3978-3982 (2022)
  4. K. Kamiya, K. Fujii, M. Sugiyama, S. Nakanishi, “CO2 Electrolysis in Integrated Artificial Photosynthesis Systems,” Chem. Lett., 50, 1, 166-179 (2021)
  5. Y. Kikuchi, T. Ichikawa, M. Sugiyama, M. Koyama, “Battery-assisted low-cost hydrogen production from solar energy: Rational target setting for future technology systems,” Int. J. Hydrogen Energy, 44, 1451-1465 (2019)
  6. K. Toprasertpong, T. Inoue, Y. Nakano, M. Sugiyama, “Investigation and modeling of photocurrent collection process in multiple quantum well solar cells,” Solar Energy Materials and Solar Cells, v 174, p 146-156 (2018)
  7. M. Sugiyama, H. Fujii, T. Katoh, K. Toprasertpong, H. Sodabanlu, K. Watanabe, D. Alonso-Álvarez, N. J. Ekins-Daukes and Y. Nakano, “Quantum Wire-on-Well (WoW) Cell with Long Carrier Lifetime for Efficient Carrier Transport,” Prog. Photovoltaics Res. Appl., 24, 1606-14 (2016).