Koji Niwa
- Public Health, Environmental and Occupational Health top 2%
- Reproductive Medicine top 1%
- Molecular Biology
- Genetics top 10%
- Pediatrics, Perinatology and Child Health
- Co-authors
- Kiyoshi OkudaHiroaki FunahashiK. MiyoshiJeong‐Mook LimKi‐Eun ParkKen SawaiWei‐Hua WangLalantha R. Abeydeera
- Topics
- Reproductive Biology and Fertility (40 papers)Sperm and Testicular Function (35 papers)Ovarian function and disorders (17 papers)
- Partner nations
- JapanUnited StatesUnited Kingdom
In The Last Decade
Koji Niwa
47 papers receiving 936 citations
Peers
Comparison fields: 5 of 64
- Public Health, Environmental and Occupational Health 835
- Reproductive Medicine 630
- Molecular Biology 279
- Genetics 218
- Pediatrics, Perinatology and Child Health 61
Countries citing papers authored by Koji Niwa
This map shows the geographic impact of Koji Niwa'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 Niwa with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Koji Niwa more than expected).
Fields of papers citing papers by Koji Niwa
This network shows the impact of papers produced by Koji Niwa. 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 Niwa. The network helps show where Koji Niwa may publish in the future.
Co-authorship network of co-authors of Koji Niwa
This figure shows the co-authorship network connecting the top 25 collaborators of Koji Niwa. A scholar is included among the top collaborators of Koji Niwa 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 Niwa. Koji Niwa is excluded from the visualization to improve readability, since they are connected to all nodes in the network.
All Works
| # | Work | Indexed citations |
|---|---|---|
| 1 | 8 | |
| 2 | 1 | |
| 3 | 20 | |
| 4 | 11 | |
| 5 | 13 | |
| 6 | 22 | |
| 7 | 48 | |
| 8 | 19 | |
| 9 | 22 | |
| 10 | 13 | |
| 11 | 60 | |
| 12 | 8 | |
| 13 | 82 | |
| 14 | 9 | |
| 15 | 5 | |
| 16 | 25 | |
| 17 | 130 | |
| 18 | 10 | |
| 19 | 1 | |
| 20 | 3 |
About Koji Niwa
Koji Niwa is a scholar working on Reproductive Medicine, Public Health, Environmental and Occupational Health and Agronomy and Crop Science, having authored 47 papers that have together received 971 indexed citations. Recurring topics across this work include Reproductive Biology and Fertility (40 papers), Sperm and Testicular Function (35 papers) and Ovarian function and disorders (17 papers). The work is most often cited by research in Reproductive Medicine (630 citations), Public Health, Environmental and Occupational Health (835 citations) and Physiology (41 citations). Koji Niwa has collaborated with scholars based in Japan, United States and United Kingdom. Frequent co-authors include Kiyoshi Okuda, Hiroaki Funahashi, K. Miyoshi, Jeong‐Mook Lim, Ki‐Eun Park, Ken Sawai, Wei‐Hua Wang, Lalantha R. Abeydeera, Atsushi Asano and Weihua Wang. Their work appears in journals such as PLoS ONE, Fertility and Sterility and Biology of Reproduction.
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.