Keiichi Maruyama

108 total papers · 4.8k total citations
71 papers, 3.7k citations indexed

About

Keiichi Maruyama is a scholar working on Pulmonary and Respiratory Medicine, Surgery and Gastroenterology. According to data from OpenAlex, Keiichi Maruyama has authored 71 papers receiving a total of 3.7k indexed citations (citations by other indexed papers that have themselves been cited), including 59 papers in Pulmonary and Respiratory Medicine, 37 papers in Surgery and 20 papers in Gastroenterology. Recurrent topics in Keiichi Maruyama’s work include Gastric Cancer Management and Outcomes (53 papers), Metastasis and carcinoma case studies (27 papers) and Gastrointestinal Tumor Research and Treatment (19 papers). Keiichi Maruyama is often cited by papers focused on Gastric Cancer Management and Outcomes (53 papers), Metastasis and carcinoma case studies (27 papers) and Gastrointestinal Tumor Research and Treatment (19 papers). Keiichi Maruyama collaborates with scholars based in Japan, United States and United Kingdom. Keiichi Maruyama's co-authors include Taira Kinoshitá, Mitsuru Sasako, Kenzo Okabayashi, Hitoshi Katai, Takeshi Sano, Peter McCulloch, Peter Gunvén, M. Sasako, Kan Okabayashi and Cornelis J.�H. van de Velde and has published in prestigious journals such as Cancer, Annals of Surgery and British Journal of Cancer.

Co-authorship network of co-authors of Keiichi Maruyama

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

Keiichi Maruyama

70 papers receiving 3.6k citations

Fields of papers citing papers by Keiichi Maruyama

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Countries citing papers authored by Keiichi Maruyama

Since Specialization
Citations

This map shows the geographic impact of Keiichi Maruyama'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 Keiichi Maruyama with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Keiichi Maruyama 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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2026