Ryuji Okamura

440 total citations
39 papers, 282 citations indexed

About

Ryuji Okamura is a scholar working on Surgery, Pulmonary and Respiratory Medicine and Oncology. According to data from OpenAlex, Ryuji Okamura has authored 39 papers receiving a total of 282 indexed citations (citations by other indexed papers that have themselves been cited), including 19 papers in Surgery, 8 papers in Pulmonary and Respiratory Medicine and 8 papers in Oncology. Recurrent topics in Ryuji Okamura's work include Organ Transplantation Techniques and Outcomes (6 papers), Liver physiology and pathology (5 papers) and Liver Disease and Transplantation (5 papers). Ryuji Okamura is often cited by papers focused on Organ Transplantation Techniques and Outcomes (6 papers), Liver physiology and pathology (5 papers) and Liver Disease and Transplantation (5 papers). Ryuji Okamura collaborates with scholars based in Japan and United States. Ryuji Okamura's co-authors include Kazue Ozawa, Tatsushi Kato, Shoji Tsuji, Masataka Majima, Sahar Mohsin, Keiji Takahashi, Eiichiro Uyama, S. Kawasaki, S Araki and Yuya Nakamura and has published in prestigious journals such as Hypertension, Transplantation and Journal of Parenteral and Enteral Nutrition.

In The Last Decade

Ryuji Okamura

35 papers receiving 274 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Ryuji Okamura Japan 9 108 53 51 46 45 39 282
Hiroaki Shimizu Japan 12 168 1.6× 25 0.5× 96 1.9× 28 0.6× 25 0.6× 36 366
Veerle De Boe Belgium 10 72 0.7× 21 0.4× 78 1.5× 82 1.8× 24 0.5× 22 365
Warangkana Pichaiwong Thailand 8 82 0.8× 46 0.9× 120 2.4× 11 0.2× 20 0.4× 11 416
Chong Zhang China 8 32 0.3× 55 1.0× 93 1.8× 39 0.8× 29 0.6× 36 290
Roshni Vara United Kingdom 13 96 0.9× 115 2.2× 157 3.1× 60 1.3× 16 0.4× 34 462
Myrto Giannopoulou Greece 8 109 1.0× 17 0.3× 77 1.5× 26 0.6× 20 0.4× 14 324
Sefa Tüzün Türkiye 10 58 0.5× 68 1.3× 95 1.9× 25 0.5× 7 0.2× 30 324
Takahisa Kobayashi Japan 10 61 0.6× 35 0.7× 166 3.3× 19 0.4× 11 0.2× 23 380
J. Ros Spain 7 134 1.2× 26 0.5× 54 1.1× 103 2.2× 9 0.2× 9 335
Yoshinori Araki Japan 11 52 0.5× 13 0.2× 75 1.5× 15 0.3× 19 0.4× 28 256

Countries citing papers authored by Ryuji Okamura

Since Specialization
Citations

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

Fields of papers citing papers by Ryuji Okamura

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Ryuji Okamura

This figure shows the co-authorship network connecting the top 25 collaborators of Ryuji Okamura. A scholar is included among the top collaborators of Ryuji Okamura 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 Ryuji Okamura. Ryuji Okamura is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Shiota, Tetsuya, et al.. (2019). [A Case of Anaphylactic Shock after First Administration of Oxaliplatin].. PubMed. 46(9). 1433–1435.
2.
Yoh, Tomoaki, et al.. (2016). Cholangiolocellular carcinoma with rapid progression initially showing abnormally elevated serum alfa-fetoprotein. Clinical Journal of Gastroenterology. 9(4). 257–260. 6 indexed citations
3.
Okamura, Ryuji, et al.. (2016). Left atrium mass in a patient with breast cancer: a case report. Journal of Medical Case Reports. 10(1). 285–285. 3 indexed citations
4.
Yoh, Tomoaki, et al.. (2014). Multicystic biliary hamartoma mimicking intrahepatic cholangiocarcinoma: report of a case. Clinical Journal of Gastroenterology. 7(5). 418–421. 8 indexed citations
5.
Yoh, Tomoaki, Ryuji Okamura, Yuya Nakamura, & Atsushi Kobayashi. (2014). Divided Saphenectomy for Varicose Vein in Ambulatory Surgery. Annals of Vascular Diseases. 7(2). 195–198. 2 indexed citations
6.
Yoh, Tomoaki, Atsushi Kobayashi, Yuya Nakamura, et al.. (2013). [A case of metastatic acsending colon cancer showing sustained complete response to chemotherapy with SOX and followed UFT].. PubMed. 40(7). 947–9. 1 indexed citations
7.
Okamura, Ryuji, et al.. (2012). [Oral combination chemotherapy with capecitabine and cyclophosphamide in combination with endocrine therapy and anti-HER2 therapy for advanced and metastatic breast cancer].. PubMed. 70 Suppl 7. 592–6. 1 indexed citations
8.
Yoh, Tomoaki, Ryuji Okamura, Motoshige Higashiyama, et al.. (2011). TORSION OF THE APPENDICIEAL MUCOCELE IN A PREGNANT WOMAN-REPORT OF A CASE-. Nihon Rinsho Geka Gakkai Zasshi (Journal of Japan Surgical Association). 72(6). 1479–1483.
9.
Nakamura, Yuya, et al.. (2010). A CASE OF PARAGANGLIOMA ARISEN IN THE TRANSVERSE MESOCOLON. Nihon Rinsho Geka Gakkai Zasshi (Journal of Japan Surgical Association). 71(5). 1333–1336.
10.
Shimizu, Naoki, Hideyuki Okamoto, Shinji Koyama, et al.. (2008). Laryngeal carcinoma in a non-smoker female patient with thyroid carcinoma: Report of a case. Auris Nasus Larynx. 35(4). 572–575. 1 indexed citations
11.
Yamamoto, Akira, Ryuji Okamura, Yoshiaki Nakamura, et al.. (2006). Dynamic helical CT mammography of breast cancer. Radiation Medicine. 24(1). 35–40. 10 indexed citations
12.
Kodama, Hiroshi, Takehiko Hatano, Ryuji Okamura, et al.. (2001). A randomized study comparing oral and standard regimens for metastatic breast cancer. Oncology Reports. 8(5). 1067–71. 8 indexed citations
13.
Yamamoto, Hidekazu, Akira Tanaka, Hideyuki Yoshida, et al.. (2000). A Case of Biliary Cystadenocarcinoma.. The Japanese Journal of Gastroenterological Surgery. 33(2). 215–219. 2 indexed citations
14.
Tokunaga, Yukihiko, Sumio Mukaihara, Hiroyuki Nakayama, et al.. (1993). Metallic Expanding Biliary Stents in Malignant Obstruction. Journal of Clinical Gastroenterology. 17(2). 153–157. 3 indexed citations
15.
Okamura, Ryuji, Akira Tanaka, Shiro Uyama, & Kazue Ozawa. (1992). Low-temperature fluorometric technique for evaluating the viability of rat liver grafts after simple cold storage. Transplant International. 5(3). 165–169. 10 indexed citations
16.
17.
Okamura, Ryuji, Katsuhiro Asonuma, Shinji Üemoto, et al.. (1989). Immunological Treatment with Low Dosage Ciclosporin in Rat Liver Allotransplantation. European Surgical Research. 21(5). 235–242. 6 indexed citations
18.
Asonuma, Katsuhiro, Kazuo Tanaka, Shinji Üemoto, et al.. (1989). Changes in blood ketone body ratio with reference to graft viability after liver transplantation in rats. Transplant International. 2(3). 133–136. 5 indexed citations
19.
Okamoto, Ryuichi, Norio Ozaki, Tetsuya Kiuchi, et al.. (1988). Fluorometric study for the noninvasive determination of cellular viability in perfused rat livers.. PubMed. 20(1 Suppl 1). 969–71. 1 indexed citations
20.
Tanaka, Kōichi, Shinji Üemoto, Ryuji Okamura, et al.. (1988). A NEW BIOABSORBABLE MATERIAL FOR RAT VENOUS ANASTOMOSIS. Transplantation. 46(4). 620–622. 7 indexed citations

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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