K. Koyama

457 papers and 15.4k indexed citations i.

About

K. Koyama is a scholar working on Astronomy and Astrophysics, Nuclear and High Energy Physics and Aerospace Engineering. According to data from OpenAlex, K. Koyama has authored 457 papers receiving a total of 15.4k indexed citations (citations by other indexed papers that have themselves been cited), including 349 papers in Astronomy and Astrophysics, 212 papers in Nuclear and High Energy Physics and 36 papers in Aerospace Engineering. Recurrent topics in K. Koyama’s work include Cosmology and Gravitation Theories (244 papers), Galaxies: Formation, Evolution, Phenomena (168 papers) and Black Holes and Theoretical Physics (146 papers). K. Koyama is often cited by papers focused on Cosmology and Gravitation Theories (244 papers), Galaxies: Formation, Evolution, Phenomena (168 papers) and Black Holes and Theoretical Physics (146 papers). K. Koyama collaborates with scholars based in Japan, United Kingdom and United States. K. Koyama's co-authors include Gong‐Bo Zhao, Roy Maartens, Gianmassimo Tasinato, Baojiu Li, Gustavo Niz, Marco Crisostomi, David Wands, Shuntaro Mizuno, Jiro Soda and Frederico Arroja and has published in prestigious journals such as Nature, Science and Physical Review Letters.

In The Last Decade

Co-authorship network of co-authors of K. Koyama i

Fields of papers citing papers by K. Koyama

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Countries citing papers authored by K. Koyama

Since Specialization
Citations

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