Masaaki Hirai

13 papers and 324 indexed citations i.

About

Masaaki Hirai is a scholar working on Surgery, Pulmonary and Respiratory Medicine and Oncology. According to data from OpenAlex, Masaaki Hirai has authored 13 papers receiving a total of 324 indexed citations (citations by other indexed papers that have themselves been cited), including 9 papers in Surgery, 7 papers in Pulmonary and Respiratory Medicine and 2 papers in Oncology. Recurrent topics in Masaaki Hirai’s work include Esophageal and GI Pathology (4 papers), Gallbladder and Bile Duct Disorders (4 papers) and Pancreatic and Hepatic Oncology Research (2 papers). Masaaki Hirai is often cited by papers focused on Esophageal and GI Pathology (4 papers), Gallbladder and Bile Duct Disorders (4 papers) and Pancreatic and Hepatic Oncology Research (2 papers). Masaaki Hirai collaborates with scholars based in Japan and United Kingdom. Masaaki Hirai's co-authors include Takashi Joh, Yasuhiro Kitajima, Kazuki Hayashi, Hirotaka Ohara, Yasutaka Okayama, Hitoshi Sano, Katsuyuki Miyabe, Takahiro Nakazawa, Tomoaki Ando and Hiroaki Yamashita and has published in prestigious journals such as The Journals of Gerontology Series A, Journal of Gastroenterology and Hepatology and Journal of Gastroenterology.

In The Last Decade

Co-authorship network of co-authors of Masaaki Hirai i

Fields of papers citing papers by Masaaki Hirai

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Countries citing papers authored by Masaaki Hirai

Since Specialization
Citations

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