Chikahiro Oka

13 papers and 545 indexed citations i.

About

Chikahiro Oka is a scholar working on Public Health, Environmental and Occupational Health, Reproductive Medicine and Pediatrics, Perinatology and Child Health. According to data from OpenAlex, Chikahiro Oka has authored 13 papers receiving a total of 545 indexed citations (citations by other indexed papers that have themselves been cited), including 10 papers in Public Health, Environmental and Occupational Health, 7 papers in Reproductive Medicine and 4 papers in Pediatrics, Perinatology and Child Health. Recurrent topics in Chikahiro Oka’s work include Reproductive Biology and Fertility (9 papers), Assisted Reproductive Technology and Twin Pregnancy (4 papers) and Reproductive Health and Technologies (4 papers). Chikahiro Oka is often cited by papers focused on Reproductive Biology and Fertility (9 papers), Assisted Reproductive Technology and Twin Pregnancy (4 papers) and Reproductive Health and Technologies (4 papers). Chikahiro Oka collaborates with scholars based in Japan. Chikahiro Oka's co-authors include Tetsunori Mukaida, Tetsuya Goto, K. Takahashi, Katsuhiko Takahashi, Tatsuhiro Tomiyama, Kazuhiro Takahashi, Magosaburo Kasai, Saki Nakamura, Kentaro Takahashi and Ken‐ichi Iwasaki and has published in prestigious journals such as Human Reproduction, Fertility and Sterility and European Journal of Obstetrics & Gynecology and Reproductive Biology.

In The Last Decade

Co-authorship network of co-authors of Chikahiro Oka i

Fields of papers citing papers by Chikahiro Oka

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Chikahiro Oka. 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 Chikahiro Oka. The network helps show where Chikahiro Oka may publish in the future.

Countries citing papers authored by Chikahiro Oka

Since Specialization
Citations

This map shows the geographic impact of Chikahiro Oka'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 Chikahiro Oka with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Chikahiro Oka 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.

Explore authors with similar magnitude of impact

Rankless by CCL
2025