About

3 October 2025

Education

  • April 2026 – Present
    Ph.D. course, Mathematical informatics & Design Engineering Laboratory, Department of Mechanical Engineering, Graduate School of Engineering, The University of Tokyo
  • April 2024 – March 2026
    Master’s course, Mathematical informatics & Design Engineering Laboratory, Department of Mechanical Engineering, Graduate School of Engineering, The University of Tokyo
  • April 2022 – March 2024
    Department of Mechanical Engineering, Faculty of Engineering, The University of Tokyo
  • April 2020 – March 2022
    Natural Sciences I, College of Arts and Sciences, The University of Tokyo

Research Experience

  • Mathematical Design Engineering Laboratory (Yamada Laboratory)
    • October 2022 – Present
    • Working on the mathematical design of acoustic and elastic devices under the supervision of Prof. Takayuki Yamada at the Graduate School of Engineering, The University of Tokyo.
  • Tachi Laboratory
    • March 2022 – Present
    • Working on the design of geometric structures under the supervision of Prof. Tomohiro Tachi at the Graduate School of Arts and Sciences, The University of Tokyo.
  • Paulose Group
    • September 2025 – December 2025
    • Researching mechanical metamaterials under the supervision of Prof. Jayson Paulose at the Department of Physics, University of Oregon.
  • Nature Architects Inc.
    • March 2023 – June 2023, October 2023 – September 2024
    • Engaged in performance evaluation tasks based on numerical analysis as an intern.
  • RoboTech, The University of Tokyo
    • April 2020 – June 2023
    • Participated in the NHK Student Robot Contest.
    • Contributed to robot design and manufacturing as a member of the mechanical team, and to club management as vice president.

Fellowships, etc.

Awards

Publications

International Journals

  • Deguchi, H., Matsushima, K., Yamada, T.,
    Observation of exceptional points in a spherical open elastic system, Journal of Sound and Vibration, Vol. 611 (2025.9), No. 119114.
    doi:10.1016/j.jsv.2025.119114

Domestic Journals

  • Deguchi, H., Matsushima, K., Yamada, T.,
    Realization of viscoelastic modulus bounds via numerical investigation and topology optimization based on homogenization of 6mm hexagonal lattices, Journal of JASCOME, Vol.25 (2025.12), No.15-251219, pp.121-127.
    doi:10.60443/jascome.25.0_121

Preprints

  • Deguchi, H., Matsushima, K., Yamada, T.,
    Topology optimization of isotropic viscoelastic microstructures based on periodic homogenization, arXiv preprints.
    arXiv:2505.05217

Presentations

International Conferences

  • Deguchi, H., 〇Matsushima, K., Yamada, T.,
    Numerical study of exceptional points in two- and three-dimensional elastic solids, 7th Australasian Conference on Wave Science (KOZWaves 2026), January 28-30, 2026, Sydney, Australia.
  • 〇Deguchi, H., Matsushima, K., Yamada, T., Topology optimization of viscoelastic composites using complex-valued homogenization, 16th Conference on Evolutionary and Deterministic Methods for Design, Optimization, and Control with Applications (EUROGEN 2025), ECCOMAS, September 16-18, 2025, Lahti, Finland.
  • 〇Deguchi, H., Matsushima, K., Yamada, T.,
    Controlling the Acoustic Impedance of Viscoelastic Materials Using Topology Optimization, 16th World Congress on Structural and Multidisciplinary Optimization (WCSMO2025), May 18-23, 2025, Kobe, Japan, No. K6-3.
  • 〇Deguchi, H., 〇Minami, H., 〇Nishimoto, S., 〇Tendo, T., 〇Warisaya, K., 〇Tachi, T.,
    Kids workshop, 30th Annual Conference on Computer-Aided Architectural Design Research in Asia (CAADRIA2025), March 26-28, 2025, Tokyo, Japan.
  • 〇Deguchi, H., Matsushima, K., Yamada, T.,
    Identification of exceptional points in a spherical open elastic system based on a recursive algorithm, 16th International Conference on Mathematical and Numerical Aspects of Wave Propagation (WAVES2024), June 30 - July 6, 2024, Berlin, Germany, 280.

Domestic Conferences

  • 〇Deguchi, H., Matsushima, K., Yamada, T.,
    Realization of viscoelastic modulus bounds via numerical investigation and topology optimization based on homogenization of 6mm hexagonal lattices, JASCOME Symposium 2025 (JASCOME Symposium 2026), The Japan Society for Computational Engineering and Science, December 19-20, 2025, Himeji, No.15-251219.
  • 〇Deguchi, H., Matsushima, K., Yamada, T., Sensitivity analysis for topology optimization of viscoelastic composite materials based on the homogenization method, The 38th Conference on Computational Mechanics (CMD2025), JSME, September 24-26, 2025, Shinshu University, OS1-2.
  • 〇Deguchi, H., Matsushima, K., Yamada, T.,
    Evaluation of sound absorption characteristics for designing sound absorbers using the homogenization method for viscoelastic composite materials, The 35th Design & Systems Conference (D&S2025), JSME, September 3-5, 2025, Meiji University, 2301.
  • 〇Deguchi, H., Matsushima, K., Yamada, T.,
    Sensitivity analysis for topology optimization of non-Hermitian acoustic phononic crystals, The 15th Optimization Symposium (OPTIS2024), JSME, October 26-27, 2024, Hokkaido University, A14-1.
  • 〇Deguchi, H., Matsushima, K., Yamada, T.,
    Decomposition of the displacement field of a spherical elastic body into scalar potentials and its orthogonality, The 37th Conference on Computational Mechanics (CMD2024), JSME, October 18-20, 2024, T-NET HALL SENDAI, OS-0114.
  • 〇Deguchi, H., Matsushima, K., Yamada, T.,
    A study on the complex eigenfrequencies of a spherical elastic body, The 36th Conference on Computational Mechanics (CMD2023), JSME, October 25-27, 2023, Toyohashi Chamber of Commerce and Industry (Aichi), OS-2604.
  • 〇Deguchi, H., Tomohiro, T.,
    Bendron ― A Part with Duality of Rigidity and Flexibility ―, The 15th Digital Modeling Contest, The Japan Society for Graphic Science, November 25-26, 2023, Kurobe, Toyama.