Hirokazu Amaya

1.1k total citations
20 papers, 913 citations indexed

About

Hirokazu Amaya is a scholar working on Surgery, Molecular Biology and Pulmonary and Respiratory Medicine. According to data from OpenAlex, Hirokazu Amaya has authored 20 papers receiving a total of 913 indexed citations (citations by other indexed papers that have themselves been cited), including 10 papers in Surgery, 10 papers in Molecular Biology and 7 papers in Pulmonary and Respiratory Medicine. Recurrent topics in Hirokazu Amaya's work include Angiogenesis and VEGF in Cancer (10 papers), Gastric Cancer Management and Outcomes (6 papers) and Cancer, Hypoxia, and Metabolism (4 papers). Hirokazu Amaya is often cited by papers focused on Angiogenesis and VEGF in Cancer (10 papers), Gastric Cancer Management and Outcomes (6 papers) and Cancer, Hypoxia, and Metabolism (4 papers). Hirokazu Amaya collaborates with scholars based in Japan and United States. Hirokazu Amaya's co-authors include Mai Matsumura, N Tanigawa, Takumi Shimomatsuya, R Muraoka, Tetsuya Horiuchi, Akihiro Kitaoka, Masayuki Iki, Cheng‐Hsien Lu, Katsuhiko Matsuyama and C Lu and has published in prestigious journals such as Journal of Clinical Oncology, Cancer and British Journal of Cancer.

In The Last Decade

Hirokazu Amaya

15 papers receiving 883 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Hirokazu Amaya Japan 12 581 369 316 242 148 20 913
Soon‐Myoung Kang Japan 11 703 1.2× 522 1.4× 368 1.2× 349 1.4× 203 1.4× 17 1.2k
P. Vermeulen Belgium 13 582 1.0× 537 1.5× 419 1.3× 210 0.9× 56 0.4× 22 1.0k
William O’Connor United States 11 621 1.1× 303 0.8× 249 0.8× 139 0.6× 169 1.1× 28 998
Keizo Sugimachi Japan 14 352 0.6× 391 1.1× 253 0.8× 248 1.0× 259 1.8× 26 897
Keisuke Matsusaki Japan 20 566 1.0× 385 1.0× 259 0.8× 213 0.9× 245 1.7× 43 1.1k
Enrica Vitarelli Italy 17 269 0.5× 213 0.6× 114 0.4× 159 0.7× 143 1.0× 52 797
Shunji Matsumura Japan 16 731 1.3× 423 1.1× 376 1.2× 212 0.9× 225 1.5× 18 1.2k
Kelly J. Gordon United States 7 701 1.2× 315 0.9× 156 0.5× 121 0.5× 82 0.6× 10 1.0k
Yulin L. Liu United States 9 254 0.4× 263 0.7× 137 0.4× 220 0.9× 92 0.6× 11 600
Hideaki Kakinuma Japan 18 658 1.1× 321 0.9× 182 0.6× 233 1.0× 226 1.5× 34 1.1k

Countries citing papers authored by Hirokazu Amaya

Since Specialization
Citations

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

Fields of papers citing papers by Hirokazu Amaya

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Hirokazu Amaya

This figure shows the co-authorship network connecting the top 25 collaborators of Hirokazu Amaya. A scholar is included among the top collaborators of Hirokazu Amaya 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 Hirokazu Amaya. Hirokazu Amaya 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.
Amaya, Hirokazu, et al.. (2006). A CASE OF CARCINOID OF THE SMALL INTESTINE PRESENTED WITH AN INTRAPERITONEAL ABSCESS. Nihon Rinsho Geka Gakkai Zasshi (Journal of Japan Surgical Association). 67(1). 97–101. 3 indexed citations
2.
Komatsu, Shuhei, et al.. (2005). Prognostic factors and scoring system for survival in colonic perforation.. PubMed. 52(63). 761–4. 34 indexed citations
3.
Amaya, Hirokazu, et al.. (2004). A Case of Granular Echinococcosis of the Liver. The Japanese Journal of Gastroenterological Surgery. 37(12). 1834–1838. 3 indexed citations
4.
Kato, Yasushi, Tomoaki Nakamura, Hirokazu Amaya, et al.. (2003). Expression and role of thrombospondin-1 in colorectal cancer.. PubMed. 22(6C). 3941–8. 45 indexed citations
5.
Kim, Woochan, et al.. (2002). A Case of Concomitant Malignant Primary Gastric Lymphoma and Adenocarcinoma.. Nihon Rinsho Geka Gakkai Zasshi (Journal of Japan Surgical Association). 63(11). 2683–2687.
6.
Shimomatsuya, Takumi, et al.. (2002). A Case of Ehlers-Danlos Syndrome Type IV Complicating Abdominal Aortic Rupture during Late Pregnancy.. Nihon Rinsho Geka Gakkai Zasshi (Journal of Japan Surgical Association). 63(6). 1379–1382. 1 indexed citations
7.
Amaya, Hirokazu, et al.. (2001). Meconium Peritonitis Caused by Intestinal Duplication-induced Ileal Volvulus. Report of a case.. Nihon Rinsho Geka Gakkai Zasshi (Journal of Japan Surgical Association). 62(5). 1295–1299. 1 indexed citations
8.
Amaya, Hirokazu, et al.. (2000). A CASE OF INTESTINAL T -CELL LYMPHOMA OF THE JEJUNUM WITH PERFORATION. Nihon Rinsho Geka Gakkai Zasshi (Journal of Japan Surgical Association). 61(3). 680–684. 1 indexed citations
9.
Shimomatsuya, Takumi, et al.. (1999). CLINICAL STUDIES AND OPERATIVE METHODS OF GASTRIC CANCER IN PATIENTS OVER 80 YEARS OLD. Nihon Rinsho Geka Gakkai Zasshi (Journal of Japan Surgical Association). 60(9). 2305–2310. 2 indexed citations
10.
11.
Tanigawa, Nobuhiko, et al.. (1998). Association between Tumor Angiogenesis and Borrmann Type 4 Carcinomas of the Stomach. Oncology. 55(5). 461–467. 15 indexed citations
12.
Tanigawa, N, Hirokazu Amaya, Mai Matsumura, & Takumi Shimomatsuya. (1997). Association of tumour vasculature with tumour progression and overall survival of patients with non-early gastric carcinomas. British Journal of Cancer. 75(4). 566–571. 40 indexed citations
13.
Tanigawa, N, Hirokazu Amaya, Mai Matsumura, & Takumi Shimomatsuya. (1997). Correlation between expression of vascular endothelial growth factor and tumor vascularity, and patient outcome in human gastric carcinoma.. Journal of Clinical Oncology. 15(2). 826–832. 154 indexed citations
14.
15.
Tanigawa, Nobuhiko, Mitsuyoshi Matsumura, Hirokazu Amaya, et al.. (1997). Tumor vascularity correlates with the prognosis of patients with esophageal squamous cell carcinoma. Cancer. 79(2). 220–225. 12 indexed citations
16.
Tanigawa, Nobuhiko, Mitsuyoshi Matsumura, Hirokazu Amaya, et al.. (1997). Tumor vascularity correlates with the prognosis of patients with esophageal squamous cell carcinoma. Cancer. 79(2). 220–225. 98 indexed citations
17.
Tanigawa, N, Hirokazu Amaya, Mai Matsumura, et al.. (1997). Tumor angiogenesis and mode of metastasis in patients with colorectal cancer.. PubMed. 57(6). 1043–6. 147 indexed citations
18.
Shimomatsuya, Takumi, Tetsuya Horiuchi, Nobuhiko Tanigawa, et al.. (1996). LAPAROSCOPIC SPLENECTOMY FOR THE PATIENTS WITH IDIOPATHIC THROMBOCYTOPENIC PURPURA. The journal of the Japanese Practical Surgeon Society. 57(12). 2928–2933. 1 indexed citations
19.
Tanigawa, N, Hirokazu Amaya, Mai Matsumura, et al.. (1996). Tumor angiogenesis and expression of thymidine phosphorylase/ platelet derived endothelial cell growth factor in human gastric carcinoma. Cancer Letters. 108(2). 281–290. 40 indexed citations
20.
Tanigawa, N, Hirokazu Amaya, Mai Matsumura, et al.. (1996). Extent of tumor vascularization correlates with prognosis and hematogenous metastasis in gastric carcinomas.. PubMed. 56(11). 2671–6. 178 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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