Tomohiko Hiyama

36 papers and 2.5k indexed citations i.

About

Tomohiko Hiyama is a scholar working on Epidemiology, Hepatology and Oncology. According to data from OpenAlex, Tomohiko Hiyama has authored 36 papers receiving a total of 2.5k indexed citations (citations by other indexed papers that have themselves been cited), including 21 papers in Epidemiology, 12 papers in Hepatology and 10 papers in Oncology. Recurrent topics in Tomohiko Hiyama’s work include Liver Disease Diagnosis and Treatment (11 papers), Multiple and Secondary Primary Cancers (10 papers) and Hepatitis C virus research (10 papers). Tomohiko Hiyama is often cited by papers focused on Liver Disease Diagnosis and Treatment (11 papers), Multiple and Secondary Primary Cancers (10 papers) and Hepatitis C virus research (10 papers). Tomohiko Hiyama collaborates with scholars based in Japan, United States and South Korea. Tomohiko Hiyama's co-authors include Christopher P. Howson, Ernst L. Wynder, Isaburo Fujimoto, Hideaki Tsukuma, Katsumi Nakanishi, Tsugio Kitamura, Hideo Yamazaki, Sachiko Tanaka, Miho Nakao and Atsuo Inoue and has published in prestigious journals such as New England Journal of Medicine, Gastroenterology and Cancer.

In The Last Decade

Co-authorship network of co-authors of Tomohiko Hiyama i

Fields of papers citing papers by Tomohiko Hiyama

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Countries citing papers authored by Tomohiko Hiyama

Since Specialization
Citations

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