About me

I am a PhD student at the Department of Computing, Imperial College London, on a study-abroad programme from Canon Inc., where I am a researcher, jointly supervised by Prof. Yingzhen Li and Prof. Edward Johns. I previously earned a BSc in Physics from Tokyo University of Science under Prof. Hideaki Sakata and an MSc in Materials Science at The University of Tokyo under Prof. Satoru Nakatsuji. At Canon, I conduct R&D in machine learning and fluid–structure analysis for medical systems and semiconductor manufacturing equipment.

My research focuses on sequential models and time-series learning, with an emphasis on continuous-time modelling, such as ordinary/stochastic differential equations and state-space models (including HiPPO, S4, and Mamba). I develop Bayesian methods for uncertainty quantification and inference, and design model-based reinforcement learning and planning algorithms. I am particularly interested in applying machine learning to problems in science and engineering.

Selected Publications

For a complete list of publications, see Google Scholar.

• Neural Stochastic Flows: Solver-Free Modelling and Inference for SDE Solutions
  Naoki Kiyohara, Edward Johns, Yingzhen Li
  Neural Information Processing Systems (NeurIPS), 2025
  Project | Paper | Code

• Recurrent Memory for Online Interdomain Gaussian Processes
  Wenlong Chen*, Naoki Kiyohara*, Harrison Bo Hua Zhu*, Jacob Curran-Sebastian, Samir Bhatt, Yingzhen Li (* equal contribution)
  Neural Information Processing Systems (NeurIPS), 2025
  Paper | Code

• An In Silico Model for Predicting the Efficacy of Edge-to-Edge Repair for Mitral Regurgitation
  Junichi Ooida, Naoki Kiyohara, Hironaga Noguchi, Yuichiro Oguchi, Kohei Nagane, Takuya Sakaguchi, Gakuto Aoyama, Fumimasa Shige, James V. Chapman, Masahiko Asami, Klaus F. Kofoed, Michael H. C. Pham, Koshiro Suzuki
  Journal of Biomechanical Engineering, 146(2):021004, 2024
  Paper

• Enabling nanoimprint simulator for quality verification; process-design co-optimization toward high volume manufacturing
  J. Seki, Y. Oguchi, N. Kiyohara, K. Suzuki, K. Nagane, S. Narioka, T. Nakayama, Y. Shiode, S. Aihara, T. Asano
  Journal of Micro/Nanopatterning, Materials, and Metrology, Vol. 21, Issue 1, 011005, 2022
  Paper

• Giant Anomalous Hall Effect in the Chiral Antiferromagnet Mn3Ge
  Naoki Kiyohara, Takahiro Tomita, Satoru Nakatsuji
  Phys. Rev. Applied 5, 064009, 2016
  Paper

• Large anomalous Hall effect in a non-collinear antiferromagnet at room temperature
  Satoru Nakatsuji, Naoki Kiyohara, Tomoya Higo
  Nature, 527(7577):212–215, 2015
  Paper

Contact

Feel free to reach out to me at: n.kiyohara23 [at] imperial [dot] ac [dot] uk