Masayasu Koyama
- Immunology top 5%
- Obstetrics and Gynecology top 1%
- Public Health, Environmental and Occupational Health top 5%
- Epidemiology top 10%
- Surgery top 10%
- Co-authors
- Fumitaka SajiChihiro AzumaNoboru MatsuzakiKoichiro ShimoyaHitomi NakamuraYuji MurataKazuhide OgitaTadashi Kimura
- Topics
- Reproductive System and Pregnancy (26 papers)Pelvic floor disorders treatments (23 papers)Pregnancy and preeclampsia studies (21 papers)
- Partner nations
- JapanUnited StatesGermany
In The Last Decade
Masayasu Koyama
117 papers receiving 2.0k citations
Peers
Comparison fields: 5 of 109
- Immunology 654
- Obstetrics and Gynecology 430
- Public Health, Environmental and Occupational Health 380
- Epidemiology 321
- Surgery 309
Countries citing papers authored by Masayasu Koyama
This map shows the geographic impact of Masayasu 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 Masayasu Koyama with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Masayasu Koyama more than expected).
Fields of papers citing papers by Masayasu Koyama
This network shows the impact of papers produced by Masayasu 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 Masayasu Koyama. The network helps show where Masayasu Koyama may publish in the future.
Co-authorship network of co-authors of Masayasu Koyama
This figure shows the co-authorship network connecting the top 25 collaborators of Masayasu Koyama. A scholar is included among the top collaborators of Masayasu 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 Masayasu Koyama. Masayasu 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 | 4 | |
| 3 | 16 | |
| 4 | 16 | |
| 5 | 6 | |
| 6 | 7 | |
| 7 | 9 | |
| 8 | 2 | |
| 9 | 18 | |
| 10 | 1 | |
| 11 | 10 | |
| 12 | 15 | |
| 13 | 13 | |
| 14 | 2 | |
| 15 | 10 | |
| 16 | 12 | |
| 17 | 90 | |
| 18 | 19 | |
| 19 | 16 | |
| 20 | 63 |
About Masayasu Koyama
Masayasu Koyama is a scholar working on Obstetrics and Gynecology, Rheumatology and Reproductive Medicine, having authored 122 papers that have together received 2.0k indexed citations. Recurring topics across this work include Reproductive System and Pregnancy (26 papers), Pelvic floor disorders treatments (23 papers) and Pregnancy and preeclampsia studies (21 papers). The work is most often cited by research in Obstetrics and Gynecology (430 citations), Reproductive Medicine (304 citations) and Immunology (654 citations). Masayasu Koyama has collaborated with scholars based in Japan, United States and Germany. Frequent co-authors include Fumitaka Saji, Chihiro Azuma, Noboru Matsuzaki, Koichiro Shimoya, Hitomi Nakamura, Yuji Murata, Kazuhide Ogita, Tadashi Kimura, Osamu Tanizawa and Takashi Kameda. Their work appears in journals such as Scientific Reports, Biochemical and Biophysical Research Communications 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.