Koji Sumii

79 papers and 1.9k indexed citations i.

About

Koji Sumii is a scholar working on Surgery, Pulmonary and Respiratory Medicine and Oncology. According to data from OpenAlex, Koji Sumii has authored 79 papers receiving a total of 1.9k indexed citations (citations by other indexed papers that have themselves been cited), including 47 papers in Surgery, 30 papers in Pulmonary and Respiratory Medicine and 19 papers in Oncology. Recurrent topics in Koji Sumii’s work include Helicobacter pylori-related gastroenterology studies (38 papers), Gastric Cancer Management and Outcomes (23 papers) and Gastroesophageal reflux and treatments (13 papers). Koji Sumii is often cited by papers focused on Helicobacter pylori-related gastroenterology studies (38 papers), Gastric Cancer Management and Outcomes (23 papers) and Gastroesophageal reflux and treatments (13 papers). Koji Sumii collaborates with scholars based in Japan, United States and Australia. Koji Sumii's co-authors include Ken Haruma, Masaharu Yoshihara, Goro Kajiyama, Shinji Tanaka, Yasuhiko Kitadai, Fumio Shimamoto, Tomoari Kamada, Kazuaki Chayama, Akira Tari and Hiroyuki Kawaguchi and has published in prestigious journals such as Gastroenterology, Cancer and Oncogene.

In The Last Decade

Co-authorship network of co-authors of Koji Sumii i

Fields of papers citing papers by Koji Sumii

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Countries citing papers authored by Koji Sumii

Since Specialization
Citations

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