Hiroki Oyama

32 papers and 252 indexed citations i.

About

Hiroki Oyama is a scholar working on Surgery, Oncology and Pulmonary and Respiratory Medicine. According to data from OpenAlex, Hiroki Oyama has authored 32 papers receiving a total of 252 indexed citations (citations by other indexed papers that have themselves been cited), including 24 papers in Surgery, 21 papers in Oncology and 16 papers in Pulmonary and Respiratory Medicine. Recurrent topics in Hiroki Oyama’s work include Pancreatic and Hepatic Oncology Research (20 papers), Gallbladder and Bile Duct Disorders (14 papers) and Pancreatitis Pathology and Treatment (8 papers). Hiroki Oyama is often cited by papers focused on Pancreatic and Hepatic Oncology Research (20 papers), Gallbladder and Bile Duct Disorders (14 papers) and Pancreatitis Pathology and Treatment (8 papers). Hiroki Oyama collaborates with scholars based in Japan, Israel and New Zealand. Hiroki Oyama's co-authors include Atsushi Miyajima, Katsuhiko Shirahige, Taketomo Kido, Yuki Katou, Yousuke Nakai, Kazunaga Ishigaki, Tatsuya Sato, Ryunosuke Hakuta, Tsuyoshi Hamada and Tomotaka Saito and has published in prestigious journals such as Gastroenterology, Gut and The American Journal of Gastroenterology.

In The Last Decade

Co-authorship network of co-authors of Hiroki Oyama i

Fields of papers citing papers by Hiroki Oyama

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Countries citing papers authored by Hiroki Oyama

Since Specialization
Citations

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