Norihiro Koyama
- Reproductive Medicine top 5%
- Ovarian function and disorders 3
- Endometriosis Research and Treatment 3
- Sperm and Testicular Function 2
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- Hormonal Regulation and Hypertension 3
- Agronomy and Crop Science top 10%
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- Reproductive Biology and Fertility 6
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- Estrogen and related hormone effects 3
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- Protein Hydrolysis and Bioactive Peptides 2
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- Pregnancy and preeclampsia studies 1
Norihiro Koyama
13 papers receiving 487 citations
Peers
Comparison fields: 5 of 48
- Reproductive Medicine 202
- Endocrinology, Diabetes and Metabolism 191
- Agronomy and Crop Science 81
- Cardiology and Cardiovascular Medicine 180
- Public Health, Environmental and Occupational Health 217
Countries citing papers authored by Norihiro Koyama
This map shows the geographic impact of Norihiro 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 Norihiro Koyama with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Norihiro Koyama more than expected).
Fields of papers citing papers by Norihiro Koyama
This network shows the impact of papers produced by Norihiro 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 Norihiro Koyama. The network helps show where Norihiro Koyama may publish in the future.
Co-authorship network
The 24 scholars most cited alongside Norihiro Koyama, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.
All Works
| # | Work | ||
|---|---|---|---|
| 1 | 1997 | 3 | |
| 2 | 1996 | 97 | |
| 3 | 1996 | 48 | |
| 4 | 1994 | 44 | |
| 5 | 1993 | 60 | |
| 6 | 1993 | 80 | |
| 7 | 1992 | 18 | |
| 8 | 1992 | 38 | |
| 9 | 1992 | 71 | |
| 10 | 1992 | 15 | |
| 11 | 1992 | 5 | |
| 12 | 1992 | 1 | |
| 13 | 1992 | 24 |
About Norihiro Koyama
Norihiro Koyama is a scholar working on Reproductive Medicine, Aging and Public Health, Environmental and Occupational Health, having authored 13 papers that have together received 504 indexed citations. Recurring topics across this work include Reproductive Biology and Fertility (6 papers), Estrogen and related hormone effects (3 papers), Ovarian function and disorders (3 papers), Endometriosis Research and Treatment (3 papers), Hormonal Regulation and Hypertension (3 papers), Sperm and Testicular Function (2 papers), Protein Hydrolysis and Bioactive Peptides (2 papers) and Pregnancy and preeclampsia studies (1 paper). The work is most often cited by research in Reproductive Medicine (202 citations), Endocrinology, Diabetes and Metabolism (191 citations) and Agronomy and Crop Science (81 citations). Norihiro Koyama has collaborated with scholars based in Japan. Frequent co-authors include Yukio Nakamura, Masataka Karube, Y. Yoshimura, T. Oda, Yasunori Yoshimura, S Shiokawa, Shigetatsu Shiokawa, Masakazu Akiba, Hiroshi Hirano and Atsushi Nagai. Their work appears in journals such as Journal of Clinical Investigation, The Journal of Clinical Endocrinology & Metabolism and FEBS Letters.
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.