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RIKEN Information R&D and Strategy Headquarters Psychological Process Research Team

Team Leader: Wataru Sato (Ph.D.)

Research Summary

Wataru Sato (Ph.D.)

We conduct research to elucidate the computational mechanisms of human mind (emotions, cognition, and behavior) to develop robots with mind.

Specifically, we conduct the following research.

  • Computational elucidation of human mind; its implementation in robots collaborating with engineers.
  • Psychological evaluation of robots' functions.
  • Interdisciplinary research across psychology, informatics, and robotics, especially on emotional communication.

Main Research Fields

  • Complex Systems

Related Research Fields

  • Engineering
  • Informatics
  • Humanities & Social Sciences
  • Humanities
  • Social Sciences
  • Interdisciplinary Science & Engineering
  • Mathematical & Physical Sciences
  • Biological Sciences
  • Biology
  • Medicine, Dentistry & Pharmacy
  • Experimental psychology
  • Basic / Social brain science
  • Intelligent robotics


  • Emotion
  • Facial expression
  • Social interaction
  • Human-robot interaction
  • Neuroimaging

Selected Publications

  • 1. Hsu, C.-T., Sato, W., & Yoshikawa, S.
    "An investigation of the modulatory effects of empathic and autistic traits on emotional and facial motor responses during live social interactions."
    PLoS One (in press)
  • 2. Saito, A., Sato, W., & Yoshikawa, S.
    "Altered emotional mind-body coherence in older adults."
    Emotion(in press)
  • 3. Diel, A., Sato, W., Hsu, C.-T., & Minato, T.
    "The inversion effect on the cubic humanness-uncanniness relation in humanlike agents."
    Frontiers in Psychology, 14, 1222279. (2023)
  • 4. Sato, W., Nakazawa, A., Yoshikawa, S., Kochiyama, T., Honda, M., & Gineste, Y.
    "Behavioral and neural underpinnings of empathic characteristics in a Humanitude-care expert."
    "Frontiers in Medicine, 10, 1059203. (2023)
  • 5. Sato, W., & Kochiyama, T.
    "Crosstalk in facial EMG and its reduction using ICA."
    Sensors, 23, 2720. (2023)
  • 6. Sato, W.*, Kochiyama, T.*, & Yoshikawa, S. (* equal contributors)
    "The widespread action observation/execution matching system for facial expression processing."
    Human Brain Mapping, 44, 3057-3071. (2023)
  • 7. Ishikura, T., Yuki, K., Sato, W., Takamatsu, J., Yuguchi, A., Cho, S. G.. Ding, M., Yoshikawa, S., & Ogasawara, T.
    "Pleasant stroke touch on human back by a human and a robot."
    Sensors, 23, 1136. (2023)
  • 8. Saito, A., Sato, W., Ikegami, A., Ishihara, S., Nakauma, M., Funami, T., Fushiki, T., & Yoshikawa, S.
    "Subjective-physiological coherence during food consumption in older adults.
    Nutrients, 14, 4736. (2022)
  • 9. Hsu, C.-T., Sato, W., Kochiyama, T., Nakai, R., Asano, K., Abe, N., & Yoshikawa, S.
    "Enhanced mirror neuron network activity and effective connectivity during live interaction among female subjects.
    Neuroimage, 263, 119655 (2022)
  • 10. Sato, W., & Kochiyama, T.
    "Exploration of emotion dynamics sensing using trapezius EMG and fingertip temperature.
    Sensors, 22, 6553. (2022)

Recent Research Results

Lab Members

Principal investigator

Wataru Sato
Team Leader

Core members

Chun-Ting Hsu
Research Scientist
Akie Saito
Research Scientist
Koh Shimokawa
Technical Staff I

Contact Information

3rd Floor, Advanced Telecommunications Research Institute International
2-2-2 Hikaridai Seika-cho, Sorakugun, Kyoto
619-0288 Japan (Kansai Science City)
Email: wataru.sato.ya [at] riken.jp