Ibaraki University's
Graduate School of Science and Engineering (Engineering)
Department of Mechanical 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 Keio University Graduate School, Division of Science and Engineering Physics Doctor later 1996/03 Withdrawn after completion of required course credits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 Measuring Spatiotemporal Dynamics of Odor Gradient for Small Animals by Gas Chromatography Akiko Yamazoe-Umemoto, Yuishi Iwasaki and Koutarou D. Kimura Bio-protocol 8/ 7, e2797 2018/04/05 10.21769/BioProtoc.2797
  3. 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
  4. 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
  5. 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

Research presentations

  1. Poster presentation Causality analysis on whole-brain imaging data of C. elegans 第55回日本生物物理学会年会 2017/09/19
  2. Oral presentation(general) Neuronal signaling pathways estimated from whole-brain imaging data of C. elegans 19th IUPAB Congress and 11th EBSA Congress 2017/07/18
  3. Oral presentation(general) 線虫の全脳活動データに対する位相解析 日本物理学 第72回年次大会 2017/03/17
  4. 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
  5. 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

Alloted class

  1. 大学入門ゼミ【機械システムF】
  2. 情報システム特論
  3. 多変数の微積分学【機械システムF】
  4. 数値シミュレーション【知能A】
  5. 数値シミュレーション【知能B】

Memberships of academic societies

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