Hiroyasu Oyama

11 papers and 446 indexed citations i.

About

Hiroyasu Oyama is a scholar working on Surgery, Rheumatology and Epidemiology. According to data from OpenAlex, Hiroyasu Oyama has authored 11 papers receiving a total of 446 indexed citations (citations by other indexed papers that have themselves been cited), including 10 papers in Surgery, 7 papers in Rheumatology and 2 papers in Epidemiology. Recurrent topics in Hiroyasu Oyama’s work include Pancreatitis Pathology and Treatment (8 papers), IgG4-Related and Inflammatory Diseases (7 papers) and Gastrointestinal disorders and treatments (5 papers). Hiroyasu Oyama is often cited by papers focused on Pancreatitis Pathology and Treatment (8 papers), IgG4-Related and Inflammatory Diseases (7 papers) and Gastrointestinal disorders and treatments (5 papers). Hiroyasu Oyama collaborates with scholars based in Japan and United States. Hiroyasu Oyama's co-authors include Takayoshi Nishino, Fumitake Toki, Keiko Shiratori, Itaru Oi, Kyoko Shimizu, Makio Kobayashi, Ken Takasaki, Etsuko Hashimoto, Takashi Hatori and Naoaki Hayashi and has published in prestigious journals such as Gastrointestinal Endoscopy, Journal of Gastroenterology and Pancreas.

In The Last Decade

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

Fields of papers citing papers by Hiroyasu Oyama

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Countries citing papers authored by Hiroyasu Oyama

Since Specialization
Citations

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