Kei Hayashida

228 total papers · 3.5k total citations
106 papers, 1.8k citations indexed

About

Kei Hayashida is a scholar working on Emergency Medicine, Critical Care and Intensive Care Medicine and Surgery. According to data from OpenAlex, Kei Hayashida has authored 106 papers receiving a total of 1.8k indexed citations (citations by other indexed papers that have themselves been cited), including 61 papers in Emergency Medicine, 33 papers in Critical Care and Intensive Care Medicine and 22 papers in Surgery. Recurrent topics in Kei Hayashida's work include Cardiac Arrest and Resuscitation (56 papers), Traumatic Brain Injury and Neurovascular Disturbances (21 papers) and Thermal Regulation in Medicine (18 papers). Kei Hayashida is often cited by papers focused on Cardiac Arrest and Resuscitation (56 papers), Traumatic Brain Injury and Neurovascular Disturbances (21 papers) and Thermal Regulation in Medicine (18 papers). Kei Hayashida collaborates with scholars based in Japan, United States and South Korea. Kei Hayashida's co-authors include Masaru Suzuki, Yutaka Kondo, Motoaki Sano, Shingo Hori, Yutaka Umemura, Keiichi Fukuda, Tatsuma Fukuda, Tomoyoshi Tamura, Lance B. Becker and Shigeo Ohta and has published in prestigious journals such as Circulation, SHILAP Revista de lepidopterología and PLoS ONE.

In The Last Decade

Kei Hayashida

100 papers receiving 1.7k citations

Author Peers

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

Author Last Decade Papers Cites
Kei Hayashida 631 618 353 339 255 106 1.8k
Stephan A. Loer 664 1.1× 630 1.0× 429 1.2× 205 0.6× 243 1.0× 152 2.2k
M. Welte 347 0.5× 539 0.9× 440 1.2× 281 0.8× 305 1.2× 77 2.1k
So Yeon Kong 424 0.7× 404 0.7× 551 1.6× 289 0.9× 96 0.4× 70 1.9k
В. В. Ломиворотов 362 0.6× 691 1.1× 258 0.7× 184 0.5× 211 0.8× 155 1.8k
Rolf Ekroth 383 0.6× 780 1.3× 171 0.5× 175 0.5× 107 0.4× 86 1.9k
Matthias Heringlake 337 0.5× 848 1.4× 488 1.4× 201 0.6× 100 0.4× 121 2.2k
Thorsten Annecke 264 0.4× 519 0.8× 649 1.8× 317 0.9× 129 0.5× 76 1.5k
Asger Granfeldt 1.7k 2.6× 398 0.6× 386 1.1× 372 1.1× 107 0.4× 119 2.2k
William J. Greeley 530 0.8× 897 1.5× 369 1.0× 680 2.0× 104 0.4× 101 2.4k
Frederick A. Burrows 297 0.5× 682 1.1× 302 0.9× 415 1.2× 78 0.3× 68 2.0k

Countries citing papers authored by Kei Hayashida

Since Specialization
Citations

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

Fields of papers citing papers by Kei Hayashida

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Kei Hayashida. 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 Kei Hayashida. The network helps show where Kei Hayashida may publish in the future.

Co-authorship network of co-authors of Kei Hayashida

This figure shows the co-authorship network connecting the top 25 collaborators of Kei Hayashida. A scholar is included among the top collaborators of Kei Hayashida 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 Kei Hayashida. Kei Hayashida 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