Hiroshi Koyama
- Pulmonary and Respiratory Medicine top 1%
- Molecular Biology top 10%
- Physiology top 2%
- Nutrition and Dietetics top 1%
- Oncology top 5%
- Co-authors
- Koichi NishimuraAkihiko IkedaMitsuhiro TsukinoTakateru IzumiRizky AbdulahTakashi HajiroChiho YamazakiSatomi Kameo
- Topics
- Trace Elements in Health (32 papers)Chronic Obstructive Pulmonary Disease (COPD) Research (32 papers)Selenium in Biological Systems (25 papers)
- Cited by
- Pulmonary and Respiratory MedicineNutrition and DieteticsHealth, Toxicology and Mutagenesis
- Journals
- New England Journal of MedicineSHILAP Revista de lepidopterologíaPLoS ONE
- Partner nations
- JapanIndonesiaUnited States
In The Last Decade
Hiroshi Koyama
263 papers receiving 5.7k citations
Peers
Comparison fields: 5 of 189
- Pulmonary and Respiratory Medicine 1.6k
- Molecular Biology 868
- Physiology 796
- Nutrition and Dietetics 691
- Oncology 516
Countries citing papers authored by Hiroshi Koyama
This map shows the geographic impact of Hiroshi 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 Hiroshi Koyama with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Hiroshi Koyama more than expected).
Fields of papers citing papers by Hiroshi Koyama
This network shows the impact of papers produced by Hiroshi 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 Hiroshi Koyama. The network helps show where Hiroshi Koyama may publish in the future.
Co-authorship network of co-authors of Hiroshi Koyama
This figure shows the co-authorship network connecting the top 25 collaborators of Hiroshi Koyama. A scholar is included among the top collaborators of Hiroshi 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 Hiroshi Koyama. Hiroshi 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 | 7 | |
| 2 | 2 | |
| 3 | 1 | |
| 4 | 1 | |
| 5 | A STUDY OF THE ASSOCIATION BETWEEN SELENIUM AND CARDIOVASCULAR DISEASE IN LAMPUNG, INDONESIA. | 6 |
| 6 | 2 | |
| 7 | [A retrospective study of high-dose toremifene treatment for patients with aromatase inhibitor refractory advanced or metastatic hormone receptor-positive breast cancer]. | 2 |
| 8 | 155 | |
| 9 | Factor Analysis of the Kokoro Check Sheet (KCS) - Newly Developed Questionnaire for Depression Screening -:- Newly Developed Questionnaire for Depression Screening - | 1 |
| 10 | 0 | |
| 11 | 100 | |
| 12 | 3 | |
| 13 | A generation-based framework for spacecraft operation | 1 |
| 14 | 94 | |
| 15 | 232 | |
| 16 | 193 | |
| 17 | 2 | |
| 18 | 0 | |
| 19 | 2 | |
| 20 | Autonomous GPS-INS-Star satellite navigation system concept | 1 |
About Hiroshi Koyama
Hiroshi Koyama is a scholar working on Nutrition and Dietetics, Pulmonary and Respiratory Medicine and Health, Toxicology and Mutagenesis, having authored 288 papers that have together received 5.9k indexed citations. Recurring topics across this work include Trace Elements in Health (32 papers), Chronic Obstructive Pulmonary Disease (COPD) Research (32 papers) and Selenium in Biological Systems (25 papers). The work is most often cited by research in Pulmonary and Respiratory Medicine (1.6k citations), Nutrition and Dietetics (691 citations) and Health, Toxicology and Mutagenesis (455 citations). Hiroshi Koyama has collaborated with scholars based in Japan, Indonesia and United States. Frequent co-authors include Koichi Nishimura, Akihiko Ikeda, Mitsuhiro Tsukino, Takateru Izumi, Rizky Abdulah, Takashi Hajiro, Chiho Yamazaki, Satomi Kameo, Minato Nakazawa and Shosuke Suzuki. Their work appears in journals such as New England Journal of Medicine, SHILAP Revista de lepidopterología and PLoS ONE.
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.