Keiji Hayata

87 papers and 1.1k indexed citations i.

About

Keiji Hayata is a scholar working on Pulmonary and Respiratory Medicine, Surgery and Gastroenterology. According to data from OpenAlex, Keiji Hayata has authored 87 papers receiving a total of 1.1k indexed citations (citations by other indexed papers that have themselves been cited), including 60 papers in Pulmonary and Respiratory Medicine, 50 papers in Surgery and 28 papers in Gastroenterology. Recurrent topics in Keiji Hayata’s work include Gastric Cancer Management and Outcomes (53 papers), Esophageal Cancer Research and Treatment (29 papers) and Gastrointestinal Tumor Research and Treatment (28 papers). Keiji Hayata is often cited by papers focused on Gastric Cancer Management and Outcomes (53 papers), Esophageal Cancer Research and Treatment (29 papers) and Gastrointestinal Tumor Research and Treatment (28 papers). Keiji Hayata collaborates with scholars based in Japan and United States. Keiji Hayata's co-authors include Hiroki Yamaue, Toshiyasu Ojima, Masaki Nakamura, Masahiro Katsuda, Mikihito Nakamori, Makoto Iwahashi, Takeshi Iida, Junya Kitadani, Toshiaki Tsuji and Akihiro Takeuchi and has published in prestigious journals such as Journal of Clinical Oncology, Gastroenterology and PLoS ONE.

In The Last Decade

Co-authorship network of co-authors of Keiji Hayata i

Fields of papers citing papers by Keiji Hayata

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Countries citing papers authored by Keiji Hayata

Since Specialization
Citations

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

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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2025