KOICHI FUJIMOTO

Last Updated :2023/11/02

Affiliations, Positions
Hiroshima University, Full Professor
Web Site
https://home.hiroshima-u.ac.jp/kfjmt/
https://scholar.google.co.jp/citations?user=DiHpVKwAAAAJ
https://jglobal.jst.go.jp/en/detail?JGLOBAL_ID=201101083147200705
E-mail
kfjmthiroshima-u.ac.jp
Self-introduction
Theoretical study (mathematical modeling and data analysis) of evolving multi-level dynamics (gene expression, shape, and behaviors) in plants, animals, and microbes.

Basic Information

Academic Degrees

  • The University of Tokyo
  • The University of Tokyo
  • The University of Tokyo

Research Keywords

  • symmetry
  • fluctuation
  • morphogenesis
  • mechanobiology
  • flower

Educational Activity

Course in Charge

  1. 2023, Liberal Arts Education Program1, 3Term, Linear AlgebraII
  2. 2023, Undergraduate Education, First Semester, Special Study of Mathematics and Informatics for Graduation
  3. 2023, Undergraduate Education, Second Semester, Special Study of Mathematics and Informatics for Graduation
  4. 2023, Graduate Education (Master's Program) , 3Term, Mathematical Biology

Research Activities

Academic Papers

  1. Patterned proliferation orients tissue-wide stress to control root vascular symmetry in Arabidopsis, Current Biology, 33(5), 886-898.e8, 202303
  2. GRAS transcription factors regulate cell division planes in moss overriding the default rule., Proceedings of the National Academy of Sciences of the United States of America, 120(4), e2210632120, 20230124
  3. Neural mechanism of experience-dependent sensory gain control in C. elegans, Neuroscience Research, 202301
  4. Collective Cell Movement under Cell-Scale Tension Gradient at Tissue Interface, Journal of the Physical Society of Japan, 91(5), 20220515
  5. Traveling wave of inflammatory response to regulate the expansion or shrinkage of skin erythema., PloS one, 17(2), e0263049, 2022
  6. Polymorphism in the symmetries of gastric pouch arrangements in the sea anemone D. lineata., Zoological letters, 7(1), 12-12, 20210906
  7. Polarity Fluctuation Inhibition by Memory in Collective Cell Motion, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 90(5), 202105
  8. Rotation angle of stem cell division plane controls spiral phyllotaxis in mosses., Journal of plant research, 134(3), 457-473, 202105
  9. Tissue growth constrains root organ outlines into an isometrically scalable shape., Development (Cambridge, England), 148(4), 20210226
  10. A Mechanical Instability in Planar Epithelial Monolayers Leads to Cell Extrusion., Biophysical journal, 118(10), 2549-2560, 20200519
  11. Perianth Phyllotaxis Is Polymorphic in the Basal Eudicot Anemone and Eranthis Species, Frontiers in Ecology and Evolution, 8, 20200327
  12. A design principle for floral organ number and arrangement in flowers with bilateral symmetry., Development (Cambridge, England), 147(3), 20200204
  13. Crowding-Boosting Polarity and Motion Order of Cells, Proceedings of the Symposium on Simulation of Traffic Flow, 25, 21-24, 201912
  14. Optimal Scaling of Critical Size for Metamorphosis in the Genus Drosophila., iScience, 20, 348-358, 20191025
  15. Cell Motion Alignment as a Polarity Memory Effect, Journal of the Physical Society of Japan, 88(10), 103801-103801, 20191015
  16. Curved surface geometry-induced topological change of an excitable planar wavefront., Chaos (Woodbury, N.Y.), 29(9), 093120-093120, 201909
  17. Lateral Inhibition by a Peptide Hormone-Receptor Cascade during Arabidopsis Lateral Root Founder Cell Formation., Developmental cell, 48(1), 64-75, 20190107
  18. Cell Migration driven by Receptor Density Polarity of Cell-Matrix Adhesion, Proseeding of the Symposium on Simulation of Traffic Flow, 24, 5-8, 201812
  19. Competition for Space Is Controlled by Apoptosis-Induced Change of Local Epithelial Topology., Current biology : CB, 28(13), 2115-2128, 20180709
  20. A quantitative study of the diversity of stripe-forming processes in an arthropod cell-based field undergoing axis formation and growth., Developmental biology, 437(2), 84-104, 20180515
  21. Spiral phyllotaxis underlies constrained variation in Anemone (Ranunculaceae) tepal arrangement., Journal of plant research, 131(3), 459-468, 201805
  22. Plant-inspired pipettes., Journal of the Royal Society, Interface, 15(140), 201803
  23. Mouse spermatozoa with higher fertilization rates have thinner nuclei., PeerJ, 5, e3913, 2017
  24. Inference of Cell Mechanics in Heterogeneous Epithelial Tissue Based on Multivariate Clone Shape Quantification., Frontiers in cell and developmental biology, 5, 68-68, 2017
  25. Stochastic occurrence of trimery from pentamery in floral phyllotaxis of Anemone (Ranunculaceae), Acta Societatis Botanicorum Poloniae, 85(4), 201612
  26. Relationship between the species-representative phenotype and intraspecific variation in Ranunculaceae floral organ and Asteraceae flower numbers., Annals of botany, 117(5), 925-35, 201604
  27. Neural field dynamics for growing brains, Nonlinear Theory and Its Applications, IEICE, 7(2), 226-233, 2016
  28. A dynamical phyllotaxis model to determine floral organ number., PLoS computational biology, 11(5), e1004145, 201505
  29. A developmental basis for stochasticity in floral organ numbers., Frontiers in plant science, 5, 545-545, 2014
  30. Robustness of self-organizing chemoattractant field arising from precise pulse induction of its breakdown enzyme: a single-cell level analysis of PDE expression in Dictyostelium., Biophysical journal, 104(5), 1191-202, 20130305
  31. A design principle of group-level decision making in cell populations., PLoS computational biology, 9(6), e1003110, 2013
  32. COLLECTIVE DECISION-MAKING AND OSCILLATORY BEHAVIORS IN CELL POPULATIONS, ENGINEERING OF CHEMICAL COMPLEXITY, 11, 279-297, 2013
  33. Collective oscillations in developing cells: insights from simple systems., Development, growth & differentiation, 53(4), 503-17, 201105
  34. Inter-origin cooperativity of geminin action establishes an all-or-none switch for replication origin licensing., Genes to cells : devoted to molecular & cellular mechanisms, 16(4), 380-96, 201104
  35. The onset of collective behavior in social amoebae., Science (New York, N.Y.), 328(5981), 1021-5, 20100521
  36. Network evolution of body plans., PloS one, 3(7), e2772, 20080723
  37. Emergence of multi-time scales in coupled oscillators with plastic frequencies, Europhysics Letters (EPL), 78(2), 20004, 200704
  38. Relation between Adaptation and Irreversible Circulation in Bacteria Chemotaxis, Progress of Theoretical Physics Supplement, 161(161), 251-254, 2006
  39. Cross talking of network motifs in gene regulation that generates temporal pulses and spatial stripes., Genes to cells : devoted to molecular & cellular mechanisms, 10(11), 1025-1038, 200511
  40. Noisy signal amplification in ultrasensitive signal transduction., Proceedings of the National Academy of Sciences of the United States of America, 102(2), 331-336, 20050101
  41. Convective instability with time scale translation of the transmitted fluctuation, Physica D: Nonlinear Phenomena, 196(1-2), 67-89, 200409
  42. Bifurcation cascade as chaotic itinerancy with multiple time scales., Chaos (Woodbury, N.Y.), 13(3), 1041-1056, 200309
  43. How fast elements can affect slow dynamics, Physica D: Nonlinear Phenomena, 180(1-2), 1-16, 200306
  44. Sensitive boundary condition dependence of noise-sustained structure., Physical Review E, 63(3 Pt 2), 036218, 200103
  45. Noise-induced input dependence in a convectively unstable dynamical system, Physica D: Nonlinear Phenomena, 129(3-4), 203-222, 199905