Aya Koyanagi
- Pediatrics, Perinatology and Child Health top 10%
- Obstetrics and Gynecology top 10%
- Epidemiology
- Surgery
- Cardiology and Cardiovascular Medicine
- Co-authors
- Toshiyuki HataTakahito MiyakeYasunari MiyagiHirokazu TanakaAyush DagvadorjA Metin GülmezogluJunko NoguchiJoão Paulo Souza
- Topics
- Pregnancy and preeclampsia studies (14 papers)Congenital Heart Disease Studies (13 papers)Maternal and fetal healthcare (6 papers)
In The Last Decade
Aya Koyanagi
19 papers receiving 151 citations
Peers
Comparison fields: 5 of 41
- Pediatrics, Perinatology and Child Health 98
- Obstetrics and Gynecology 61
- Epidemiology 47
- Surgery 35
- Cardiology and Cardiovascular Medicine 24
Countries citing papers authored by Aya Koyanagi
This map shows the geographic impact of Aya Koyanagi'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 Aya Koyanagi with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Aya Koyanagi more than expected).
Fields of papers citing papers by Aya Koyanagi
This network shows the impact of papers produced by Aya Koyanagi. 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 Aya Koyanagi. The network helps show where Aya Koyanagi may publish in the future.
Co-authorship network of co-authors of Aya Koyanagi
This figure shows the co-authorship network connecting the top 25 collaborators of Aya Koyanagi. A scholar is included among the top collaborators of Aya Koyanagi 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 Aya Koyanagi. Aya Koyanagi 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 | 0 | |
| 3 | 1 | |
| 4 | 1 | |
| 5 | 1 | |
| 6 | 0 | |
| 7 | 1 | |
| 8 | 10 | |
| 9 | 2 | |
| 10 | 2 | |
| 11 | 5 | |
| 12 | 2 | |
| 13 | 1 | |
| 14 | 4 | |
| 15 | 23 | |
| 16 | 2 | |
| 17 | 15 | |
| 18 | 14 | |
| 19 | 18 | |
| 20 | 16 |
About Aya Koyanagi
Aya Koyanagi is a scholar working on Obstetrics and Gynecology, Pediatrics, Perinatology and Child Health and Epidemiology, having authored 29 papers that have together received 166 indexed citations. Recurring topics across this work include Pregnancy and preeclampsia studies (14 papers), Congenital Heart Disease Studies (13 papers) and Maternal and fetal healthcare (6 papers). The work is most often cited by research in Obstetrics and Gynecology (61 citations), Health Informatics (8 citations) and Pediatrics, Perinatology and Child Health (98 citations). Aya Koyanagi has collaborated with scholars based in Japan and Egypt. Frequent co-authors include Toshiyuki Hata, Takahito Miyake, Yasunari Miyagi, Hirokazu Tanaka, Ayush Dagvadorj, A Metin Gülmezoglu, Junko Noguchi, João Paulo Souza, Yasuo Nakahara and Yuichiro Nakai. Their work appears in journals such as Ultrasound in Obstetrics and Gynecology, International Journal of Gynecology & Obstetrics and Journal of Ultrasound in Medicine.
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.