Kenji Koyama
- Surgery top 5%
- Oncology top 5%
- Pulmonary and Respiratory Medicine top 5%
- Epidemiology top 10%
- Hepatology top 5%
- Co-authors
- Toshio SatoYoshihiro AsanumaMasashi KodamaYasushi TakagiKenji ItoJunichi TanakaHitoshi KotanagiTsutomu Sato
- Topics
- Liver Disease and Transplantation (31 papers)Organ Transplantation Techniques and Outcomes (25 papers)Liver Disease Diagnosis and Treatment (22 papers)
- Cited by
- HepatologyGastroenterologyOncology
- Partner nations
- JapanMongoliaUnited States
In The Last Decade
Kenji Koyama
155 papers receiving 1.5k citations
Peers
Comparison fields: 5 of 114
- Surgery 721
- Oncology 460
- Pulmonary and Respiratory Medicine 449
- Epidemiology 319
- Hepatology 262
Countries citing papers authored by Kenji Koyama
This map shows the geographic impact of Kenji 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 Kenji Koyama with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Kenji Koyama more than expected).
Fields of papers citing papers by Kenji Koyama
This network shows the impact of papers produced by Kenji 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 Kenji Koyama. The network helps show where Kenji Koyama may publish in the future.
Co-authorship network of co-authors of Kenji Koyama
This figure shows the co-authorship network connecting the top 25 collaborators of Kenji Koyama. A scholar is included among the top collaborators of Kenji 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 Kenji Koyama. Kenji 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 | 0 | |
| 2 | Two Discrete Log Algorithms for Super-Anomalous Elliptic Curves and Their Applications | 1 |
| 3 | Fast Exponentiation Algorithms Based on Batch-Processing and Precomputation (Special Section on Cryptography and Information Security) | 3 |
| 4 | 2 | |
| 5 | 3 | |
| 6 | A New RSA-Type Scheme Based on Singular Cubic Curves (y-αx)(y-βx )≡x^3 (mod n) (Special Section on Cryptography and Information Security) | 1 |
| 7 | The Security of an RDES Cryptosystem against Linear Cryptanalysis (Special Section on Cryptography and Information Security) | 1 |
| 8 | A New RSA-Type Scheme Based on Singular Cubic Curves y^2≡x^3+bx^2 (mod n) | 12 |
| 9 | Fast RSA-type Schemes Based on Singular Cubic Curves y²+axy=m³(mod n). | 0 |
| 10 | Efficient Cryptosystems over Elliptic Curves Based on a Product of Form-Free Primes | 4 |
| 11 | Dynamic Swapping Schemes and Differential Cryptanalysis (Special Section on Information Theory and Its Applications) | 1 |
| 12 | How to Strengthen DES-like Cryptosystems against Differential Cryptanalysis (Special Section on Cryptography and Information Security) | 2 |
| 13 | A Signed Binary Window Method for Fast Computing over Elliptic Curves (Special Section on Cryptography and Information Security) | 4 |
| 14 | Elliptic Curve Cryptosystems and Their Applications | 2 |
| 15 | "Speeding up elliptic crytosystems using a signed binary window method," Proc. of Crypto'92 | 1 |
| 16 | 3 | |
| 17 | 0 | |
| 18 | A Case of Liver Cell Adenoma in Children | 1 |
| 19 | Umbilical reconstruction in the state of umbilical defect following repair the congenital abdominal wall defect. | 1 |
| 20 | 1 |
About Kenji Koyama
Kenji Koyama is a scholar working on Hepatology, Surgery and Pulmonary and Respiratory Medicine, having authored 171 papers that have together received 1.5k indexed citations. Recurring topics across this work include Liver Disease and Transplantation (31 papers), Organ Transplantation Techniques and Outcomes (25 papers) and Liver Disease Diagnosis and Treatment (22 papers). The work is most often cited by research in Hepatology (262 citations), Gastroenterology (167 citations) and Oncology (460 citations). Kenji Koyama has collaborated with scholars based in Japan, Mongolia and United States. Frequent co-authors include Toshio Sato, Yoshihiro Asanuma, Masashi Kodama, Yasushi Takagi, Kenji Ito, Junichi Tanaka, Hitoshi Kotanagi, Tsutomu Sato, Ouki Yasui and Hideaki Andoh. Their work appears in journals such as Cancer, Annals of Surgery and Mathematics of Computation.
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.