Ken‐Ichi Nishikawa

300 total papers · 2.2k total citations
116 papers, 1.4k citations indexed

About

Ken‐Ichi Nishikawa is a scholar working on Astronomy and Astrophysics, Nuclear and High Energy Physics and Electrical and Electronic Engineering. According to data from OpenAlex, Ken‐Ichi Nishikawa has authored 116 papers receiving a total of 1.4k indexed citations (citations by other indexed papers that have themselves been cited), including 86 papers in Astronomy and Astrophysics, 63 papers in Nuclear and High Energy Physics and 21 papers in Electrical and Electronic Engineering. Recurrent topics in Ken‐Ichi Nishikawa's work include Ionosphere and magnetosphere dynamics (53 papers), Solar and Space Plasma Dynamics (45 papers) and Astrophysics and Cosmic Phenomena (39 papers). Ken‐Ichi Nishikawa is often cited by papers focused on Ionosphere and magnetosphere dynamics (53 papers), Solar and Space Plasma Dynamics (45 papers) and Astrophysics and Cosmic Phenomena (39 papers). Ken‐Ichi Nishikawa collaborates with scholars based in United States, Japan and Germany. Ken‐Ichi Nishikawa's co-authors include Yosuke Mizuno, Philip E. Hardee, Torsten Neubert, Jun-ichi Sakai, Yoshio Inoue, Koji Yazawa, J. Niemiec, M. Pohl, Yuri Lyubarsky and O. Buneman and has published in prestigious journals such as Physical Review Letters, Journal of Geophysical Research Atmospheres and SHILAP Revista de lepidopterología.

In The Last Decade

Ken‐Ichi Nishikawa

107 papers receiving 1.3k citations

Author Peers

Peers are selected by citation overlap in the author's most active subfields. citations · hero ref

Author Last Decade Papers Cites
Ken‐Ichi Nishikawa 939 703 163 155 138 116 1.4k
Huasheng Xie 376 0.4× 278 0.4× 68 0.4× 348 2.2× 31 0.2× 78 1.1k
Thomas Stringer 682 0.7× 847 1.2× 17 0.1× 241 1.6× 44 0.3× 51 1.3k
Takumi Yamamoto 238 0.3× 91 0.1× 32 0.2× 206 1.3× 121 0.9× 79 1.1k
Suresh C. Sharma 286 0.3× 225 0.3× 17 0.1× 249 1.6× 76 0.6× 163 1.2k
Junfeng Wang 998 1.1× 253 0.4× 99 0.6× 19 0.1× 26 0.2× 94 1.4k
P. Blanchard 260 0.3× 576 0.8× 85 0.5× 129 0.8× 7 0.1× 87 1.2k
K. O’Brien 1.4k 1.5× 375 0.5× 53 0.3× 205 1.3× 6 0.0× 80 1.8k
Yutong Li 154 0.2× 625 0.9× 87 0.5× 329 2.1× 27 0.2× 98 1.3k
Avdhesh Kumar 242 0.3× 626 0.9× 15 0.1× 79 0.5× 18 0.1× 62 1.1k
Jinxing Zheng 182 0.2× 483 0.7× 73 0.4× 472 3.0× 26 0.2× 134 1.8k

Countries citing papers authored by Ken‐Ichi Nishikawa

Since Specialization
Citations

This map shows the geographic impact of Ken‐Ichi Nishikawa'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 Ken‐Ichi Nishikawa with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ken‐Ichi Nishikawa more than expected).

Fields of papers citing papers by Ken‐Ichi Nishikawa

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ken‐Ichi Nishikawa. 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 Ken‐Ichi Nishikawa. The network helps show where Ken‐Ichi Nishikawa may publish in the future.

Co-authorship network of co-authors of Ken‐Ichi Nishikawa

This figure shows the co-authorship network connecting the top 25 collaborators of Ken‐Ichi Nishikawa. A scholar is included among the top collaborators of Ken‐Ichi Nishikawa 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 Ken‐Ichi Nishikawa. Ken‐Ichi Nishikawa is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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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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2026