Ibaraki University's
College of Engineering
Department of Intelligent Systems Engineering




  1. Assistant Professor, Department of Intelligent System Engineering, Ibaraki University 1996/05/01-2014/03/31
  2. 茨城大学 工学部 知能システム工学科 講師 2014/04/01-Present

Academic background

  1. Keio University Faculty of Science and Engineering Department of Physics 1991/03 Graduated
  2. Keio University Graduate School, Division of Science and Engineering Physics Doctor later 1996/03 Withdrawn after completion of required course credits

Academic degrees

  1. Ph.D. Keio University 1999/03

Current state of research and teaching activities

Numerical study on behavior and neural network of C. elegans
On the Nematode C. elegans, synaptic connectivity of the nervous system have been determined. I numerically study on the neural network of C. elegans on the basis of its behavior.

Research Areas

  1. Mathematical Physics/Fundamental Theory of Physical Properties
  2. Living Organism Physics/Chemical Physics

Research keywords

  1. Neural Network, Behavior, Learning, C.elegans, Theoretical Biophysics

Subject of research

  1. Numeral Study on Behavior and Neural Network of Nematode C.elegans On the Nematode C. elegans, synaptic connectivity of the nervous system have been determined. On the basis of behavior,I numerically study on the neural network of C. elegans. 1999/04-Present


  1. Effective Modeling of a Partial Neural Network of C.elegans: Theory and Application Yuishi Iwasaki International Congress Series 2006/06


  1. Research paper (scientific journal) Joint Calcium dynamics regulating the timing of decision-making in C. elegans Yuki Tanimoto, Akiko Yamazoe-Umemoto, Kosuke Fujita, Yuya Kawazoe, Yosuke Miyanishi, Shuhei J. Yamazaki, Xianfeng Fei, Karl Emanuel Busch, Keiko Gengyo-Ando, Junichi Nakai, Yuichi Iino, Yuishi Iwasaki, Koichi Hashimoto, Koutarou D. Kimura eLife 6, e21629 2017/05/23 10.7554/eLife.21629 URL 線虫C.エレガンスが嫌いな匂いから遠ざかるために「意思決定」を行うこと、この意思決定のために特定の神経細胞が匂い濃度の情報の積分を計算して濃度情報を蓄積すること、さらにこの積分に関わる遺伝子がヒトにも存在する重要な遺伝子(L型電位依存性カルシウムチャネル)であることを発見した。
  2. Research paper (scientific journal) Joint Modulation of different behavioral components by neuropeptide and dopamine signalings in non-associative odor learning of Caenorhabditis elegans Akiko Yamazoe-Umemoto, Kosuke Fujita, Yuichi Iino, Yuishi Iwasaki and Koutarou Kimura Neuroscience Research 99, 22-33 2015/06/08 10.1016/j.neures.2015.05.009
  3. Research paper (scientific journal) Joint Stochastic Formulation for a Partial Neural Circuit of C. elegans Yuishi Iwasaki, Sohei Gomi Bulletin of Mathematical Biology 66/ 4, 727-743 2004/07
  4. Research paper (scientific journal) Joint Evaluation of head movement periodicity and irregularity during locomotion of Caenorhabditis elegans Ryuzo Shingai, Morimichi Furudate, Katsunori Hoshi and Yuishi Iwasaki Frontiers in Behavioral Neuroscience 7, Article 20 2013/03/21 10.3389/fnbeh.2013.00020
  5. Research paper (scientific journal) Numerical Study on Error Catastrophe of Adaptive Mutants and Their Stability(共著) Journal of Physical Soicety of Japan 68/ 5, 1751-1759 1999/05

Research presentations

  1. Oral presentation(general) Large Graph Laplacian Matrix and Functional Map of Whole Brain of C. elegans The 2016 International Symposium on Nonlinear Theory and Its Applications 2016/11/30
  2. Poster presentation Phase synchronization analysis of whole-brain imaging data of C. elegans 第54回日本生物物理学会大会 2016/11/27
  3. Oral presentation(general) Whole Brain Imaging of Caenorhabditis Elegans × Machine Learning 第5回生命医薬情報学連合大会 2016/09/30
  4. Poster presentation Collective dynamics in whole-brain of C. elegans The 17th International Conference on Systems Biology 2016/09/17
  5. Poster presentation Correlation clustering reveals intrinsic graph structure of whole-brain imaging data C. elegans Topic Meeting: Neuronal Development, Synaptic Function and Behavior 2016/07/29

Alloted class

  1. Programming Exercise I
  2. Introduction to Intelligent Systems
  3. Information System I
  4. Numerical Simulation
  5. Numerical Simulation

Memberships of academic societies

  1. The Biophysical Society of Japan
  2. The Physical Society of Japan