Ryoji Ichijima

74 total papers · 669 total citations
38 papers, 425 citations indexed

About

Ryoji Ichijima is a scholar working on Surgery, Pulmonary and Respiratory Medicine and Gastroenterology. According to data from OpenAlex, Ryoji Ichijima has authored 38 papers receiving a total of 425 indexed citations (citations by other indexed papers that have themselves been cited), including 24 papers in Surgery, 22 papers in Pulmonary and Respiratory Medicine and 19 papers in Gastroenterology. Recurrent topics in Ryoji Ichijima’s work include Gastric Cancer Management and Outcomes (18 papers), Anesthesia and Sedative Agents (10 papers) and Gastrointestinal Tumor Research and Treatment (10 papers). Ryoji Ichijima is often cited by papers focused on Gastric Cancer Management and Outcomes (18 papers), Anesthesia and Sedative Agents (10 papers) and Gastrointestinal Tumor Research and Treatment (10 papers). Ryoji Ichijima collaborates with scholars based in Japan, United States and Taiwan. Ryoji Ichijima's co-authors include Hisatomo Ikehara, Sho Suzuki, Chika Kusano, Takuji Gotoda, Hirotaka Ito, Koichi Kawabe, Masashi Kawamura, Motoki Ohyauchi, Yohei Ogata and Masahiko Ohtaka and has published in prestigious journals such as SHILAP Revista de lepidopterología, Gastroenterology and Gut.

In The Last Decade

Co-authorship network of co-authors of Ryoji Ichijima

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

Ryoji Ichijima

35 papers receiving 424 citations

Fields of papers citing papers by Ryoji Ichijima

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Countries citing papers authored by Ryoji Ichijima

Since Specialization
Citations

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