Yasumasa Niwa

226 papers and 5.1k indexed citations i.

About

Yasumasa Niwa is a scholar working on Surgery, Pulmonary and Respiratory Medicine and Oncology. According to data from OpenAlex, Yasumasa Niwa has authored 226 papers receiving a total of 5.1k indexed citations (citations by other indexed papers that have themselves been cited), including 142 papers in Surgery, 100 papers in Pulmonary and Respiratory Medicine and 93 papers in Oncology. Recurrent topics in Yasumasa Niwa’s work include Gastric Cancer Management and Outcomes (62 papers), Pancreatic and Hepatic Oncology Research (60 papers) and Gastrointestinal Tumor Research and Treatment (37 papers). Yasumasa Niwa is often cited by papers focused on Gastric Cancer Management and Outcomes (62 papers), Pancreatic and Hepatic Oncology Research (60 papers) and Gastrointestinal Tumor Research and Treatment (37 papers). Yasumasa Niwa collaborates with scholars based in Japan, India and United States. Yasumasa Niwa's co-authors include Hidemi Goto, Naoki Ohmiya, Yoshiki Hirooka, Akihiro Ito, Kazuo Hara, Masahiro Tajika, Nobumasa Mizuno, Susumu Hijioka, Kenji Yamao and Yasuhiro Shimizu and has published in prestigious journals such as Journal of Clinical Oncology, Gastroenterology and Cancer Research.

In The Last Decade

Co-authorship network of co-authors of Yasumasa Niwa i

Fields of papers citing papers by Yasumasa Niwa

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Countries citing papers authored by Yasumasa Niwa

Since Specialization
Citations

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