Hiroshi Okumura

299 papers and 5.5k indexed citations i.

About

Hiroshi Okumura is a scholar working on Pulmonary and Respiratory Medicine, Surgery and Oncology. According to data from OpenAlex, Hiroshi Okumura has authored 299 papers receiving a total of 5.5k indexed citations (citations by other indexed papers that have themselves been cited), including 73 papers in Pulmonary and Respiratory Medicine, 70 papers in Surgery and 70 papers in Oncology. Recurrent topics in Hiroshi Okumura’s work include Gastric Cancer Management and Outcomes (42 papers), Esophageal Cancer Research and Treatment (36 papers) and Metastasis and carcinoma case studies (22 papers). Hiroshi Okumura is often cited by papers focused on Gastric Cancer Management and Outcomes (42 papers), Esophageal Cancer Research and Treatment (36 papers) and Metastasis and carcinoma case studies (22 papers). Hiroshi Okumura collaborates with scholars based in Japan, United States and Italy. Hiroshi Okumura's co-authors include Sumiya Ishigami, Masataka Matsumoto, Yasuto Uchikado, Shoji Natsugoe, Takashi Aikou, Shoji Natsugoe, Tetsuro Setoyama, Yoshiaki Kita, Takaaki Arigami and Yuko Kijima and has published in prestigious journals such as Journal of Biological Chemistry, Gastroenterology and Cancer Research.

In The Last Decade

Co-authorship network of co-authors of Hiroshi Okumura i

Fields of papers citing papers by Hiroshi Okumura

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Countries citing papers authored by Hiroshi Okumura

Since Specialization
Citations

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