Tomiko Koyama

10 papers and 312 indexed citations i.

About

Tomiko Koyama is a scholar working on Epidemiology, Hepatology and Cardiology and Cardiovascular Medicine. According to data from OpenAlex, Tomiko Koyama has authored 10 papers receiving a total of 312 indexed citations (citations by other indexed papers that have themselves been cited), including 6 papers in Epidemiology, 4 papers in Hepatology and 2 papers in Cardiology and Cardiovascular Medicine. Recurrent topics in Tomiko Koyama’s work include Liver Disease Diagnosis and Treatment (5 papers), Hepatitis C virus research (4 papers) and Hepatitis B Virus Studies (3 papers). Tomiko Koyama is often cited by papers focused on Liver Disease Diagnosis and Treatment (5 papers), Hepatitis C virus research (4 papers) and Hepatitis B Virus Studies (3 papers). Tomiko Koyama collaborates with scholars based in Japan, United States and Canada. Tomiko Koyama's co-authors include Hiroshi Yoshizawa, Junko Tanaka, Masaaki Mizui, Keiko Katayama, Ayumu Nakashima, Tomoyuki Akita, Yuzo Miyakawa, Junko Matsuo, Takashi Moriya and Shunji Mishiro and has published in prestigious journals such as Journal of Psychosomatic Research, Atherosclerosis and Journal of Gastroenterology and Hepatology.

In The Last Decade

Co-authorship network of co-authors of Tomiko Koyama i

Fields of papers citing papers by Tomiko Koyama

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Countries citing papers authored by Tomiko Koyama

Since Specialization
Citations

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