Koji Koyama
- Reproductive Medicine top 0.5%
- Public Health, Environmental and Occupational Health top 2%
- Molecular Biology top 10%
- Immunology top 5%
- Genetics top 5%
- Co-authors
- Akiko HasegawaS. IsojimaMinoru ShigetaShinji KomoriYoshiyuki TsujiHiroaki ShibaharaA. HasegawaGupta Sk
- Topics
- Sperm and Testicular Function (53 papers)Reproductive Biology and Fertility (38 papers)Animal Genetics and Reproduction (23 papers)
- Journals
- SHILAP Revista de lepidopterologíaThe Journal of Clinical Endocrinology & MetabolismCancer
- Partner nations
- JapanUnited StatesIndia
In The Last Decade
Koji Koyama
152 papers receiving 2.2k citations
Peers
Comparison fields: 5 of 109
- Reproductive Medicine 1.2k
- Public Health, Environmental and Occupational Health 853
- Molecular Biology 702
- Immunology 517
- Genetics 452
Countries citing papers authored by Koji Koyama
This map shows the geographic impact of Koji 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 Koji Koyama with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Koji Koyama more than expected).
Fields of papers citing papers by Koji Koyama
This network shows the impact of papers produced by Koji 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 Koji Koyama. The network helps show where Koji Koyama may publish in the future.
Co-authorship network of co-authors of Koji Koyama
This figure shows the co-authorship network connecting the top 25 collaborators of Koji Koyama. A scholar is included among the top collaborators of Koji Koyama 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 Koji Koyama. Koji Koyama is excluded from the visualization to improve readability, since they are connected to all nodes in the network.
All Works
| # | Work | Indexed citations |
|---|---|---|
| 1 | 0 | |
| 2 | 2 | |
| 3 | 1 | |
| 4 | 13 | |
| 5 | 3 | |
| 6 | Premature Ovarian Failure Syndrome May Be Induced by Autoimmune Reactions to Zona Pellucida Proteins | 6 |
| 7 | 5 | |
| 8 | 8 | |
| 9 | 7 | |
| 10 | 60 | |
| 11 | 18 | |
| 12 | 49 | |
| 13 | 1 | |
| 14 | 39 | |
| 15 | 33 | |
| 16 | 0 | |
| 17 | 2 | |
| 18 | 2 | |
| 19 | 0 | |
| 20 | 1 |
About Koji Koyama
Koji Koyama is a scholar working on Reproductive Medicine, Public Health, Environmental and Occupational Health and Immunology, having authored 166 papers that have together received 2.4k indexed citations. Recurring topics across this work include Sperm and Testicular Function (53 papers), Reproductive Biology and Fertility (38 papers) and Animal Genetics and Reproduction (23 papers). The work is most often cited by research in Reproductive Medicine (1.2k citations), Public Health, Environmental and Occupational Health (853 citations) and Immunology (517 citations). Koji Koyama has collaborated with scholars based in Japan, United States and India. Frequent co-authors include Akiko Hasegawa, S. Isojima, Minoru Shigeta, Shinji Komori, Yoshiyuki Tsuji, Hiroaki Shibahara, A. Hasegawa, Gupta Sk, Hiroshi Tsubamoto and Hideaki Sawai. Their work appears in journals such as SHILAP Revista de lepidopterología, The Journal of Clinical Endocrinology & Metabolism and Cancer.
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.