Koji Niwa

47 papers and 940 indexed citations i.

About

Koji Niwa is a scholar working on Public Health, Environmental and Occupational Health, Reproductive Medicine and Molecular Biology. According to data from OpenAlex, Koji Niwa has authored 47 papers receiving a total of 940 indexed citations (citations by other indexed papers that have themselves been cited), including 40 papers in Public Health, Environmental and Occupational Health, 36 papers in Reproductive Medicine and 8 papers in Molecular Biology. Recurrent topics in Koji Niwa’s work include Reproductive Biology and Fertility (40 papers), Sperm and Testicular Function (35 papers) and Ovarian function and disorders (17 papers). Koji Niwa is often cited by papers focused on Reproductive Biology and Fertility (40 papers), Sperm and Testicular Function (35 papers) and Ovarian function and disorders (17 papers). Koji Niwa collaborates with scholars based in Japan, United States and China. Koji Niwa's co-authors include Kiyoshi Okuda, Hiroaki Funahashi, K. Miyoshi, Jeong‐Mook Lim, Ki‐Eun Park, Wei‐Hua Wang, Ken Sawai, Lalantha R. Abeydeera, Atsushi Asano and Wei‐Hua Wang and has published in prestigious journals such as PLoS ONE, Fertility and Sterility and Biology of Reproduction.

In The Last Decade

Co-authorship network of co-authors of Koji Niwa i

Fields of papers citing papers by Koji Niwa

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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.

Countries citing papers authored by Koji Niwa

Since Specialization
Citations

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).

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.

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2025