Faculty Members

LANGUAGE ≫ Japanese


PhD, Kyoto University, Japan, 1997

Areas of specialization Functional Brain Imaging
Laboratory/research office Laboratory of Cognitive Neuroscience
Episodic memory, the memory of personal experiences, can weave the fabric of our lives. The retrieval of episodic memories can be compared to "mental time travel," which involves related sensations such as time, place, emotion, and perceptions.
One of our central research themes is the brain mechanisms underlying episodic memory. Our recent studies used functional magnetic resonance imaging (fMRI) and revealed how "remote memories" from more than ten years ago, as well as temporal and spatial contexts of episodic memory, can be represented in the brain.
We will continue to use fMRI and other techniques to challenge central questions about memory.
Current research topics
Educational background
Professional background 2014-: Professor, School of Information, Kochi University of Technology
2013-: Professor, Research Institute, Kochi University of Technology
Academic societies The Organization for Human Brain Mapping
The Physiological Society of Japan

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* Courses provided in English are shown with (E) mark

Undergraduate school
  • Project Research 1
  • Project Research 2
  • Project Research 3
  • Seminars on the School of Information
  • Graduation Thesis
  • Cognitive Neuroscience
Graduate school
  • Seminar on Infomatics I
  • Seminar on Infomatics II
  • Advanced Seminar 1
  • Advanced Seminar 2
  • Individual Work for Graduate
  • Brain Information Science

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Research activities

Research papers
  1. Authors: Moe Okayasu, Tensei Inukai, Daiki Tanaka, Kaho Tsumura, Reiko Shintaki, Masaki Takeda, Kiyoshi Nakahara, Koji Jimura
    Title: The Stroop effect involves an excitatory–inhibitory fronto–cerebellar loop
    Journal: Nature Communications, Vol. 14, No. 27, Springer Nature
    Year: 2023
  2. Authors: TSUMURA Kaho , SHINTAKI Reiko , TAKEDA Masaki, CHIKAZOE Junichi, NAKAHARA Kiyoshi, JIMURA Koji
    Title: Perceptual uncertainty alternates top-down and bottom-up fronto-temporal network signaling during response inhibition
    Journal: The Journal of Neuroscience, Vol. 42, No. 22, pp. 4567-4579, Society for Neuroscience
    Year: 2022
  3. Authors: Hisashi Tanigawa, Kei Majima, Ren Takei, Keisuke Kawasaki, Hirohito Sawahata, Kiyoshi Nakahara, Atsuhiko Iijima, Takafumi Suzuki, Yukiyasu Kamitani, Isao Hasegawa
    Title: Decoding distributed oscillatory signals driven by memory and perception in the prefrontal cortex
    Journal: Cell Reports, Vol. 39, No. 2, p. 110676, CellPress
    Year: 2022
  4. Authors: Teppei Matsui, Yoshiki Hattori, Kaho Tsumura, Ryuta Aoki, Masaki Takeda, Kiyoshi Nakahara, Koji Jimura
    Title: Executive control by fronto-parietal activity explains counterintuitive decision behavior in complex value-based decision-making.
    Journal: NeuroImage, Vol. 249, p. 118892, Elsevier
    Year: 2022
  5. Authors: Kaho Tsumura, Keita Kosugi, Yoshiki Hattori, Ryuta Aoki, Masaki Takeda, Kiyoshi Nakahara, Koji Jimura
    Title: Reversible Fronto-occipitotemporal Signaling Complements Task Encoding and Switching under Ambiguous Cues.
    Journal: Cerebral Cortex, Vol. bhab324, Oxford Academic
    Year: 2021
  6. Authors: Ruedeerat Keerativittayayut, Ryuta Aoki, Taghizadeh Sarabi Mitra, Koji Jimura, Kiyoshi Nakahara
    Title: Large-scale network integration in the human brain tracks temporal fluctuations in memory encoding performance.
    Journal: eLife, Vol. doi: 10.7554/eLife.32696., eLife Sciences Publications
    Year: 2018
  7. Authors: NAKAHARA Kiyoshi, ADACHI Ken, KAWASAKI Keisuke, MATSUO Takeshi, SAWAHATA Hirohito, MAJIMA Kei, TAKEDA Masaki, SUGIYAMA Sayaka, IIJIMA Atsuhiko, TANIGAWA Hisashi, SUZUKI Takafumi, KAMITANI Yukiyasu, HASEGAWA Isao
    Title: Associative-memory representations emerge as shared spatial patterns of theta activity spanning the primate temporal cortex
    Journal: Nature Communications, Vol. doi: 10.1038/ncomms11827, Nature Publishing Group
    Year: 2016
  8. Authors: Masamizu Y., Okada T., Kawasaki K., Ishibashi H., Yuasa S., Takeda S., Hasegawa I., Nakahara K.
    Title: Local and retrograde gene transfer into primate neuronal pathways via adeno-associated virus serotype 8 and 9.
    Journal: Neuroscience
    Year: 2011
  9. Authors: Matsui T., Koyano KW., Koyama M., NAKAHARAKiyoshi, Takeda M., Ohashi Y., Naya Y., Miyashita Y.
    Title: MRI-based localization of electrophysiological recording sites within the cerebral cortex at single-voxel accuracy.
    Journal: Nature Methods
    Year: 2007
  10. Authors: Koyama M., Hasegawa I., Osada T., Adachi Y., NAKAHARAKiyoshi, Miyashita Y.
    Title: Functional magnetic resonance imaging of macaque monkeys performing visually guided saccade tasks: Comparison of cortical eye fields with humans.
    Journal: Neuron
    Year: 2004
  11. Authors: NAKAHARAKiyoshi, Hayashi T., Konishi S., MIyashita Y.
    Title: Functional MRI of macaque monkeys performing a cognitive set-shifting task.
    Journal: Science
    Year: 2002
  12. Authors: Tomita H., Ohbayashi M., NAKAHARAKiyoshi, Hasegawa I., Miyashita Y.
    Title: Top-down signal from prefrontal cortex in executive control of memory retrieval.
    Journal: Nature
    Year: 1999
  13. Authors: Konishi S., Nakajima K., Uchida I., Kameyama M., NAKAHARAKiyoshi, Sekihara K., Miyashita Y.
    Title: Transient activation of inferior prefrontal cortex during cognitive set shifting.
    Journal: Nature Neuroscience
    Year: 1998
Grants-in-Aid for Scientific Research from the Japanese government
  1. Project title: Research on memory retrieval mechanisms in the primate medial temporal lobe using high-density electrocorticography
    Category: Grant-in-Aid for Scientific Research (B)
    Project number: 25282249
    Project period: 2013-2016
    Total budget amount: 19,760,000 yen
  2. Project title: Exploration of relationship between gamma-band activity and memory function in the temporal lobe
    Category: Grant-in-Aid for Challenging Exploratory Research
    Project number: 25560433
    Project period: 2013-2015
    Total budget amount: 3,770,000 yen
  3. Project title: Exploration of brain activation patterns as memory engrams
    Category: Grant-in-Aid for Challenging Exploratory Research
    Project number: 15K12777
    Project period: 2015-2017
    Total budget amount: 3,640,000 yen
  4. Project title: Investigation of functional roles of ongoing brain activity in cognition and consciousness
    Category: Grant-in-Aid for Scientific Research (A)
    Project number: 17H00891
    Project period: 2017-2020
    Total budget amount: 43,420,000 yen
  5. Project title: Reactivation of memory representation by pattern stimulation of the brain
    Category: Grant-in-Aid for Challenging Research (Pioneering)
    Project number: 17H06268
    Project period: 2017-2019
    Total budget amount: 26,000,000 yen

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Social activities

Committee roles
  1. Academic editor, Editorial board, PLOS ONE, PLOS, 2019-
  2. Review Editor on the Editorial Board of Brain Health and Clinical Neuroscience, Frontiers in Human Neuroscience, 2023-
  3. "Neuroscience of Eating: From Physiology to Pathology", Chief topic editor, Frontiers in Human Neuroscience, Frontiers in Human Neuroscience, 2019-2022
  4. Academic editor, Editorial board, PLOS ONE, PLOS, 2018-
  5. Review editor, Editorial board, Frontiers in Human Neuroscience, Frontiers in Neuroscience, 2018-2023
Published books
  1. Visual Associative Memory. In: Squire L. R. (ed.) Encyclopedia of Neuroscience., 2008

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