Eizo Okamoto

5.5k total citations · 1 hit paper
145 papers, 4.5k citations indexed

About

Eizo Okamoto is a scholar working on Surgery, Hepatology and Epidemiology. According to data from OpenAlex, Eizo Okamoto has authored 145 papers receiving a total of 4.5k indexed citations (citations by other indexed papers that have themselves been cited), including 70 papers in Surgery, 56 papers in Hepatology and 31 papers in Epidemiology. Recurrent topics in Eizo Okamoto's work include Hepatocellular Carcinoma Treatment and Prognosis (41 papers), Cholangiocarcinoma and Gallbladder Cancer Studies (22 papers) and Liver Disease Diagnosis and Treatment (18 papers). Eizo Okamoto is often cited by papers focused on Hepatocellular Carcinoma Treatment and Prognosis (41 papers), Cholangiocarcinoma and Gallbladder Cancer Studies (22 papers) and Liver Disease Diagnosis and Treatment (18 papers). Eizo Okamoto collaborates with scholars based in Japan, United States and Canada. Eizo Okamoto's co-authors include Naoki Yamanaka, Jiro Fujimoto, Akihiro Toyosaka, Takashi Ueda, Takahiro Ueki, Takeshi Oriyama, Kazutaka Furukawa, Eisuke Kawamura, Nobutaka Tanaka and Hidenao Yamamoto and has published in prestigious journals such as Nature Medicine, Gastroenterology and Hepatology.

In The Last Decade

Eizo Okamoto

137 papers receiving 4.3k citations

Hit Papers

Hepatocyte growth factor gene therapy of liver cirrhosis ... 1999 2026 2008 2017 1999 100 200 300 400 500
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. Hepatocyte growth factor gene therapy of liver cirrhosis in rats
    1999 505 citations Takahiro Ueki, Eizo Okamoto et al. profile →

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Eizo Okamoto Japan 32 2.8k 2.0k 1.3k 744 709 145 4.5k
Yasuyuki Shimahara Japan 32 1.9k 0.7× 2.0k 1.0× 829 0.6× 794 1.1× 592 0.8× 141 3.7k
Minoru Tanabe Japan 35 1.7k 0.6× 2.4k 1.2× 949 0.7× 1.3k 1.8× 963 1.4× 274 5.1k
Stefan Farkas Germany 27 1.3k 0.5× 1.5k 0.8× 1.0k 0.8× 939 1.3× 1.1k 1.6× 82 4.4k
Keiko Shiratori Japan 36 1.1k 0.4× 3.6k 1.8× 3.3k 2.5× 1.2k 1.7× 731 1.0× 201 6.3k
Nathalie Stürm France 37 1.7k 0.6× 1.1k 0.6× 2.1k 1.6× 770 1.0× 398 0.6× 117 4.4k
Yury Popov United States 37 2.3k 0.8× 1.1k 0.6× 2.2k 1.6× 554 0.7× 1.5k 2.1× 71 4.8k
Hiroyuki Yoshidome Japan 42 1.4k 0.5× 3.1k 1.6× 943 0.7× 1.9k 2.5× 1.2k 1.6× 140 5.7k
Vincenzo Cardinale Italy 35 1.3k 0.5× 2.5k 1.2× 645 0.5× 825 1.1× 886 1.2× 105 3.7k
Alessia Omenetti United States 35 1.8k 0.7× 1.1k 0.5× 1.8k 1.3× 447 0.6× 1.9k 2.7× 58 4.3k
Ravi S. Chari United States 33 873 0.3× 2.1k 1.1× 407 0.3× 924 1.2× 707 1.0× 95 3.6k

Countries citing papers authored by Eizo Okamoto

Since Specialization
Citations

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

Fields of papers citing papers by Eizo Okamoto

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Eizo Okamoto

This figure shows the co-authorship network connecting the top 25 collaborators of Eizo Okamoto. A scholar is included among the top collaborators of Eizo Okamoto 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 Eizo Okamoto. Eizo Okamoto 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.
Yamamoto, Hidenao, Jiro Fujimoto, Eizo Okamoto, et al.. (1998). Suppression of growth of hepatocellular carcinoma by sodium butyratein vitro andin vivo. International Journal of Cancer. 76(6). 897–902. 57 indexed citations
2.
Ueki, Takahiro, Jiro Fujimoto, Tatsuo Suzuki, Hidenao Yamamoto, & Eizo Okamoto. (1997). Expression of hepatocyte growth factor and its receptor c- met proto-oncogene in hepatocellular carcinoma. Hepatology. 25(4). 862–866. 170 indexed citations
3.
Tanaka, Tsuneo, Naoki Yamanaka, Takeshi Oriyama, et al.. (1996). The role of microwave coagulation therapy for hepatocellular carcinoma. Journal of Microwave Surgery. 14. 63–67. 2 indexed citations
4.
Takata, Masafumi, Eizo Okamoto, Naoki Yamanaka, et al.. (1996). A case of biloma which was developed from retention cyst in post hepatectomy patient by percutaneous microwave coagulation therapy for hepatocellular carcinoma : Report of a case. Journal of Microwave Surgery. 14. 117–122. 2 indexed citations
5.
Yamasaki, Susumu, Hiroshi Hasegawa, Hiroaki Kinoshita, et al.. (1996). A Prospective Randomized Trial of the Preventive Effect of Pre‐operative Transcatheter Arterial Embolization against Recurrence of Hepatocellular Carcinoma. Japanese Journal of Cancer Research. 87(2). 206–211. 126 indexed citations
6.
Furukawa, Kazutaka, Eizo Okamoto, Naoki Yamanaka, et al.. (1994). The Significance of Resection Range and Surgical Margin for Hepatocellular Carcinomas.. The Japanese Journal of Gastroenterological Surgery. 27(10). 2317–2321. 1 indexed citations
7.
Ohashi, Shuichi, et al.. (1993). Cytometrical and Pharmacological Studies on the Function of the Myenteric Plexus in Severe Idiopathic Chronic Constipation. The Japanese Journal of Gastroenterological Surgery. 26(2). 203–213.
8.
Yamanaka, Naoki, et al.. (1993). Preoperative evaluation of severity of liver fibrosis by multivariate analysis.. Kanzo. 34(10). 791–797. 3 indexed citations
9.
Yamanaka, Naoki, Eizo Okamoto, Toshihiro Kato, et al.. (1992). Do the tumor cells of hepatocellular carcinomas dislodge into the portal venous stream during hepatic resection?. Cancer. 70(9). 2263–2267. 101 indexed citations
10.
Hada, Toshikazu, Yuzo Ichimori, Hiroyasu Imanishi, et al.. (1992). Establishment of an Enzyme Immunoassay Using Monoclonal Antibody (HG1‐219) and Its Application for the Diagnosis of Hepatocellular Carcinoma. Japanese Journal of Cancer Research. 83(12). 1366–1372. 1 indexed citations
11.
Toyosaka, Akihiro, Eizo Okamoto, Naoki Yamanaka, et al.. (1991). Pathomorphological and angiographic studies on intrahepatic metastasis of hepatocellular carcinoma. With special reference to efferent vessel of the tumor.. The Japanese Journal of Gastroenterological Surgery. 24(4). 1121–1126. 1 indexed citations
12.
Fujimoto, Jiro, Eizo Okamoto, Naoki Yamanaka, et al.. (1989). Post transfusion hepatitis in heapatectomized patients.. The Japanese Journal of Gastroenterological Surgery. 22(3). 774–778. 1 indexed citations
13.
Okamoto, Eizo, et al.. (1988). [Metastatic renal tumor originating from esophageal carcinoma: a case report].. PubMed. 34(6). 1017–21.
14.
Yamanaka, Naoki, et al.. (1987). Indication of safe and beneficial hepatectomy for patients with hepatocellular carcinoma.. The Japanese Journal of Gastroenterological Surgery. 20(7). 1701–1709. 1 indexed citations
15.
Okamoto, Eizo, et al.. (1986). Study on suppressive factor of lymphocyte blastogenesis in human liver cell surface extract.. Kanzo. 27(6). 762–769. 1 indexed citations
16.
Okamoto, Eizo, et al.. (1985). Surgical treatments for hepatocellular carcinoma with extrahepatic malignancies.. The Japanese Journal of Gastroenterological Surgery. 18(11). 2336–2339. 1 indexed citations
17.
Tanaka, Nobutaka, Eizo Okamoto, Akihiro Toyosaka, & Naoki Nakao. (1983). [Pathohistological evaluation of hepatic artery ligation (HAL) or transcatheter arterial embolization (TAE) on primary carcinoma of the liver].. PubMed. 84(6). 518–28. 1 indexed citations
18.
Ichida, Takafumi, et al.. (1983). . Kanzo. 24(12). 1429–1437.
19.
Okamoto, Eizo, et al.. (1982). . Kanzo. 23(11). 1315–1325. 3 indexed citations
20.
Okamoto, Eizo, et al.. (1981). CLINICOPATHOLOGICAL STUDY OF PLASMA CARCINOEMBRYONIC ANTIGEN IN PATIENTS WITH COLORECTAL CANCER. The Japanese Journal of Gastroenterological Surgery. 14(8). 1221–1229. 1 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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