Ko Tomishima

34 papers and 140 indexed citations i.

About

Ko Tomishima is a scholar working on Surgery, Pulmonary and Respiratory Medicine and Oncology. According to data from OpenAlex, Ko Tomishima has authored 34 papers receiving a total of 140 indexed citations (citations by other indexed papers that have themselves been cited), including 28 papers in Surgery, 20 papers in Pulmonary and Respiratory Medicine and 20 papers in Oncology. Recurrent topics in Ko Tomishima’s work include Gallbladder and Bile Duct Disorders (20 papers), Pancreatic and Hepatic Oncology Research (19 papers) and Pediatric Hepatobiliary Diseases and Treatments (15 papers). Ko Tomishima is often cited by papers focused on Gallbladder and Bile Duct Disorders (20 papers), Pancreatic and Hepatic Oncology Research (19 papers) and Pediatric Hepatobiliary Diseases and Treatments (15 papers). Ko Tomishima collaborates with scholars based in Japan, United States and South Korea. Ko Tomishima's co-authors include Shigeto Ishii, Hiroyuki Isayama, Toshio Fujisawa, Hiroaki Saito, Yusuke Takasaki, Akinori Suzuki, Sho Takahashi, Shuichiro Shiina, Koichi Ito and Tadakazu Hisamatsu and has published in prestigious journals such as Journal of Clinical Oncology, Gastroenterology and International Journal of Molecular Sciences.

In The Last Decade

Co-authorship network of co-authors of Ko Tomishima

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

Fields of papers citing papers by Ko Tomishima

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Countries citing papers authored by Ko Tomishima

Since Specialization
Citations

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