Hirokazu Okada

24 papers and 448 indexed citations i.

About

Hirokazu Okada is a scholar working on Surgery, Pulmonary and Respiratory Medicine and Oncology. According to data from OpenAlex, Hirokazu Okada has authored 24 papers receiving a total of 448 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 6 papers in Oncology. Recurrent topics in Hirokazu Okada’s work include Gallbladder and Bile Duct Disorders (6 papers), Cholangiocarcinoma and Gallbladder Cancer Studies (5 papers) and Pediatric Hepatobiliary Diseases and Treatments (4 papers). Hirokazu Okada is often cited by papers focused on Gallbladder and Bile Duct Disorders (6 papers), Cholangiocarcinoma and Gallbladder Cancer Studies (5 papers) and Pediatric Hepatobiliary Diseases and Treatments (4 papers). Hirokazu Okada collaborates with scholars based in Japan, United States and Germany. Hirokazu Okada's co-authors include Hisateru Niki, Takaaki Hirano, H. Suzuki, Eric G. Neilson, Shizuko Nagao, Hisahide Takahashi, Moroe Beppu, Hiroshi Seno, Mikiya Beppu and Ken Takahashi and has published in prestigious journals such as Gastroenterology, Scientific Reports and Biochemical and Biophysical Research Communications.

In The Last Decade

Co-authorship network of co-authors of Hirokazu Okada

This figure shows the co-authorship network connecting the top 25 collaborators of Hirokazu Okada. A scholar is included among the top collaborators of Hirokazu Okada based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Hirokazu Okada. Hirokazu Okada is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

Fields of papers citing papers by Hirokazu Okada

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Countries citing papers authored by Hirokazu Okada

Since Specialization
Citations

This map shows the geographic impact of Hirokazu Okada'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 Hirokazu Okada with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Hirokazu Okada 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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2026