Ryoichi Ichikawa

1.3k total citations
19 papers, 1.0k citations indexed

About

Ryoichi Ichikawa is a scholar working on Cellular and Molecular Neuroscience, Developmental Neuroscience and Molecular Biology. According to data from OpenAlex, Ryoichi Ichikawa has authored 19 papers receiving a total of 1.0k indexed citations (citations by other indexed papers that have themselves been cited), including 16 papers in Cellular and Molecular Neuroscience, 8 papers in Developmental Neuroscience and 6 papers in Molecular Biology. Recurrent topics in Ryoichi Ichikawa's work include Neuroscience and Neuropharmacology Research (15 papers), Neurogenesis and neuroplasticity mechanisms (7 papers) and Hearing, Cochlea, Tinnitus, Genetics (2 papers). Ryoichi Ichikawa is often cited by papers focused on Neuroscience and Neuropharmacology Research (15 papers), Neurogenesis and neuroplasticity mechanisms (7 papers) and Hearing, Cochlea, Tinnitus, Genetics (2 papers). Ryoichi Ichikawa collaborates with scholars based in Japan and Germany. Ryoichi Ichikawa's co-authors include Masahiko Watanabe, Masanobu Kano, Yoshiro Inoue, Kenji Sakimura, Kouichi Hashimoto, Masayoshi Mishina, Tsutomu Hashikawa, Haruyuki Tatsumi, Taisuke Miyazaki and K. Kitamura and has published in prestigious journals such as Proceedings of the National Academy of Sciences, Circulation and Neuron.

In The Last Decade

Ryoichi Ichikawa

17 papers receiving 1.0k citations

Peers

Ryoichi Ichikawa

CMN

NEURO

Alessandra L. Scotti Switzerland

Richard M. Devon Canada

Clemens Neusch Germany

Chien-ping Wu China

Marie Simard United States

Stephanie J. Fischer United States

P. Elyse Schauwecker United States

York Rudhard Germany

Esperanza R. Matarredona Spain

Ezekiel P. Carpenter‐Hyland United States

Alessandra L. Scotti Switzerland

Ryoichi Ichikawa

573 ×0.8

CMN

373 ×0.9

188 ×0.7

197 ×0.8

NEURO

68 ×0.6

Citations per year, relative to Ryoichi Ichikawa Ryoichi Ichikawa (= 1×) peers Alessandra L. Scotti

Countries citing papers authored by Ryoichi Ichikawa

Since Specialization

Citations

This map shows the geographic impact of Ryoichi Ichikawa's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Ryoichi Ichikawa with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ryoichi Ichikawa more than expected).

Fields of papers citing papers by Ryoichi Ichikawa

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ryoichi Ichikawa. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Ryoichi Ichikawa. The network helps show where Ryoichi Ichikawa may publish in the future.

Co-authorship network of co-authors of Ryoichi Ichikawa

This figure shows the co-authorship network connecting the top 25 collaborators of Ryoichi Ichikawa. A scholar is included among the top collaborators of Ryoichi Ichikawa based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Ryoichi Ichikawa. Ryoichi Ichikawa is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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19 of 19 papers shown

Ohtani, Hiroyuki, et al.. (2025). Single-molecule DNA analysis implicates brain mitochondria pathology in bipolar disorder. Molecular Psychiatry. 30(10). 4764–4775.

Ishida, Miki, Ryoichi Ichikawa, Katsuya Ohbuchi, et al.. (2025). A tardive dyskinesia drug target VMAT-2 participates in neuronal process elongation. Scientific Reports. 15(1). 12049–12049.

Ichikawa, Ryoichi, Kenji Sakimura, & Masahiko Watanabe. (2016). GluD2 Endows Parallel Fiber–Purkinje Cell Synapses with a High Regenerative Capacity. Journal of Neuroscience. 36(17). 4846–4858. 21 indexed citations

Ichikawa, Ryoichi, Kouichi Hashimoto, Taisuke Miyazaki, et al.. (2016). Territories of heterologous inputs onto Purkinje cell dendrites are segregated by mGluR1-dependent parallel fiber synapse elimination. Proceedings of the National Academy of Sciences. 113(8). 2282–2287. 54 indexed citations

Ichikawa, Ryoichi, Miwako Yamasaki, Taisuke Miyazaki, et al.. (2011). Developmental Switching of Perisomatic Innervation from Climbing Fibers to Basket Cell Fibers in Cerebellar Purkinje Cells. Journal of Neuroscience. 31(47). 16916–16927. 43 indexed citations

Hashimoto, Kouichi, Ryoichi Ichikawa, K. Kitamura, Masahiko Watanabe, & Masanobu Kano. (2009). Translocation of a “Winner” Climbing Fiber to the Purkinje Cell Dendrite and Subsequent Elimination of “Losers” from the Soma in Developing Cerebellum. Neuron. 63(1). 106–118. 124 indexed citations

Shibata, Takashi, Masahiko Watanabe, Ryoichi Ichikawa, Kaname Ameda, & Tomohiko Koyanagi. (2003). Transient neonatal expression of NR2B/2D subunit mRNAs of the N-methyl-d-aspartate receptor in the parasympathetic preganglionic neurons in the rat spinal cord. Developmental Brain Research. 140(2). 263–268. 3 indexed citations

Liu, Mingyue, Yuichi Hattori, Atsushi Sato, et al.. (2002). Ovariectomy Attenuates Hyperpolarization and Relaxation Mediated by Endothelium-Derived Hyperpolarizing Factor in Female Rat Mesenteric Artery: A Concomitant Decrease in Connexin-43 Expression. Journal of Cardiovascular Pharmacology. 40(6). 938–948. 48 indexed citations

Ichikawa, Ryoichi, Taisuke Miyazaki, Masanobu Kano, et al.. (2002). Distal extension of climbing fiber territory and multiple innervation caused by aberrant wiring to adjacent spiny branchlets in cerebellar Purkinje cells lacking glutamate receptor delta 2.. PubMed. 22(19). 8487–503. 140 indexed citations

10.

Ichikawa, Ryoichi, Masanobu Kano, Tsutomu Hashikawa, et al.. (2002). Distal Extension of Climbing Fiber Territory and Multiple Innervation Caused by Aberrant Wiring to Adjacent Spiny Branchlets in Cerebellar Purkinje Cells Lacking Glutamate Receptor δ2. Journal of Neuroscience. 22(19). 8487–8503. 132 indexed citations

11.

Nakamura, Kazuhiro, Toshiya Manabe, Masahiko Watanabe, et al.. (2001). Enhancement of hippocampal LTP, reference memory and sensorimotor gating in mutant mice lacking a telencephalon‐specific cell adhesion molecule. European Journal of Neuroscience. 13(1). 179–189. 69 indexed citations

12.

Hashimoto, Kouichi, Ryoichi Ichikawa, Hajime Takechi, et al.. (2001). Roles of Glutamate Receptor δ2 Subunit (GluRδ2) and Metabotropic Glutamate Receptor Subtype 1 (mGluR1) in Climbing Fiber Synapse Elimination during Postnatal Cerebellar Development. Journal of Neuroscience. 21(24). 9701–9712. 139 indexed citations

13.

Shibata, Takashi, Masahiko Watanabe, Ryoichi Ichikawa, Yoshiro Inoue, & Tomohiko Koyanagi. (1999). Different expressions of ?-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid andN-methyl-D-aspartate receptor subunit mRNAs between visceromotor and somatomotor neurons of the rat lumbosacral spinal cord. The Journal of Comparative Neurology. 404(2). 172–182. 30 indexed citations

14.

Watanabe, Masahiko, et al.. (1999). Early establishment of lesion-insensitive mature barrelettes corresponding to upper lip vibrissae in developing mice. Neuroscience Research. 33(1). 9–15. 5 indexed citations

15.

Sugihara, Tsuneki, Yuichi Hattori, Fazhi Qi, et al.. (1999). Preferential Impairment of Nitric Oxide–Mediated Endothelium-Dependent Relaxation in Human Cervical Arteries After Irradiation. Circulation. 100(6). 635–641. 107 indexed citations

16.

Tanaka, Jun, Ryoichi Ichikawa, Masahiko Watanabe, Kohichi Tanaka, & Yoshiro Inoue. (1997). Extra-junctional localization of glutamate transporter EAAT4 at excitatory Purkinje cell synapses. Neuroreport. 8(11). 2461–2464. 54 indexed citations

17.

Watanabe, Masahiko, Shin Nakagawa, Chitoshi Takayama, et al.. (1995). Cerebellum of the adult reeler mutant mouse contains two Purkinje cell populations with respect to gene expression for the N-methyl-d-aspartate receptor channel. Neuroscience Research. 22(3). 335–345. 13 indexed citations

18.

Inoue, Yoshiro, et al.. (1993). Abnormal synaptic architecture in the cerebellar cortex of a new dystonic mutant mouse, Wriggle Mouse Sagami. Neuroscience Research. 16(1). 39–48. 23 indexed citations

19.

Terashima, Toshio, Toshiaki Katada, Ryoichi Ichikawa, Michio Ui, & Yoshiro Inoue. (1993). Distribution of guanine nucleotide-binding protein in the brain of the reeler mutant mouse. Brain Research. 601(1-2). 136–142. 5 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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