Kei Hirayama
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In The Last Decade
Co-authorship network of co-authors of Kei Hirayama i
Fields of papers citing papers by Kei Hirayama
Since SpecializationThis network shows the impact of papers produced by Kei Hirayama. 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 Kei Hirayama. The network helps show where Kei Hirayama may publish in the future.
Countries citing papers authored by Kei Hirayama
Since SpecializationThis map shows the geographic impact of Kei Hirayama'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 Kei Hirayama with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Kei Hirayama 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.