Zen’ichiro Wajima

87 total papers · 2.9k total citations
67 papers, 2.0k citations indexed

About

Zen’ichiro Wajima is a scholar working on Surgery, Cardiology and Cardiovascular Medicine and Anesthesiology and Pain Medicine. According to data from OpenAlex, Zen’ichiro Wajima has authored 67 papers receiving a total of 2.0k indexed citations (citations by other indexed papers that have themselves been cited), including 30 papers in Surgery, 26 papers in Cardiology and Cardiovascular Medicine and 23 papers in Anesthesiology and Pain Medicine. Recurrent topics in Zen’ichiro Wajima's work include Anesthesia and Sedative Agents (20 papers), Cardiac, Anesthesia and Surgical Outcomes (14 papers) and Anesthesia and Pain Management (13 papers). Zen’ichiro Wajima is often cited by papers focused on Anesthesia and Sedative Agents (20 papers), Cardiac, Anesthesia and Surgical Outcomes (14 papers) and Anesthesia and Pain Management (13 papers). Zen’ichiro Wajima collaborates with scholars based in Japan and United States. Zen’ichiro Wajima's co-authors include Toshiya Shiga, Tetsuo Inoue, Yoko Ohe, Atsuhiro Sakamoto, Christian C. Apfel, Ryo Ogawa, Akira Ogura, Ryo Ogawa, T. Inoue and Ryo Ogawa and has published in prestigious journals such as Brain Research, The American Journal of Medicine and Critical Care Medicine.

In The Last Decade

Zen’ichiro Wajima

64 papers receiving 1.9k citations

Hit Papers

Predicting Difficult Intu... 2005 2026 2012 2019 2005 2008 100 200 300 400 500
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation benchmark for papers published in the same subfield and year, or reaches the top citation threshold in at least one of its specific research topics.

  1. Predicting Difficult Intubation in Apparently Normal Patients
    2005 587 citations Toshiya Shiga, Zen’ichiro Wajima et al. Anesthesiology profile →
  2. Is operative delay associated with increased mortality of hip fracture patients? Systematic review, meta-analysis, and meta-regression
    2008 500 citations Toshiya Shiga, Zen’ichiro Wajima et al. Canadian Journal of Anesthesia/Journal canadien d anesthésie profile →

Author Peers

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

Author Last Decade Papers Cites
Zen’ichiro Wajima 928 854 748 717 226 67 2.0k
Toshiya Shiga 919 1.0× 883 1.0× 914 1.2× 859 1.2× 260 1.2× 79 2.2k
Mary E. Warner 1.3k 1.4× 879 1.0× 544 0.7× 769 1.1× 207 0.9× 69 2.4k
Daniel M. Philbin 1.0k 1.1× 1.0k 1.2× 480 0.6× 619 0.9× 280 1.2× 101 2.6k
M. Ramez Salem 559 0.6× 476 0.6× 716 1.0× 955 1.3× 267 1.2× 108 2.0k
E. Andrew Ochroch 1.1k 1.2× 462 0.5× 984 1.3× 1.2k 1.7× 280 1.2× 69 2.3k
Christoph Konrad 717 0.8× 389 0.5× 396 0.5× 706 1.0× 297 1.3× 69 1.9k
Peter Szmuk 736 0.8× 387 0.5× 964 1.3× 1.2k 1.7× 368 1.6× 104 2.2k
Sergi Sabaté 1.1k 1.1× 948 1.1× 1.0k 1.4× 740 1.0× 123 0.5× 72 2.2k
David M. Polaner 997 1.1× 480 0.6× 551 0.7× 760 1.1× 132 0.6× 50 1.9k
Pankaj Kundra 885 1.0× 420 0.5× 695 0.9× 981 1.4× 213 0.9× 134 1.8k

Countries citing papers authored by Zen’ichiro Wajima

Since Specialization
Citations

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

Fields of papers citing papers by Zen’ichiro Wajima

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Zen’ichiro Wajima. 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 Zen’ichiro Wajima. The network helps show where Zen’ichiro Wajima may publish in the future.

Co-authorship network of co-authors of Zen’ichiro Wajima

This figure shows the co-authorship network connecting the top 25 collaborators of Zen’ichiro Wajima. A scholar is included among the top collaborators of Zen’ichiro Wajima 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 Zen’ichiro Wajima. Zen’ichiro Wajima 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