Masayasu Hamaji

588 total citations
45 papers, 427 citations indexed

About

Masayasu Hamaji is a scholar working on Surgery, Epidemiology and Pulmonary and Respiratory Medicine. According to data from OpenAlex, Masayasu Hamaji has authored 45 papers receiving a total of 427 indexed citations (citations by other indexed papers that have themselves been cited), including 23 papers in Surgery, 12 papers in Epidemiology and 10 papers in Pulmonary and Respiratory Medicine. Recurrent topics in Masayasu Hamaji's work include Neuroendocrine Tumor Research Advances (10 papers), Gastric Cancer Management and Outcomes (6 papers) and Pancreatic and Hepatic Oncology Research (5 papers). Masayasu Hamaji is often cited by papers focused on Neuroendocrine Tumor Research Advances (10 papers), Gastric Cancer Management and Outcomes (6 papers) and Pancreatic and Hepatic Oncology Research (5 papers). Masayasu Hamaji collaborates with scholars based in Japan and Germany. Masayasu Hamaji's co-authors include Toshirou Nishida, Kazuyasu Nakao, Tokuichiro Seki, Kazushi Kurozumi, Hikaru Matsuda, Wataru Kamiike, Yasunaru Kawashima, Y. Kawai, Masaya Tohyama and Masahiko Tsujimoto and has published in prestigious journals such as The Journal of Clinical Endocrinology & Metabolism, Annals of Surgery and Brain Research.

In The Last Decade

Masayasu Hamaji

42 papers receiving 409 citations

Peers

Masayasu Hamaji

SURGE

EDM

ONCOL

PRM

PHYSI

Zheng-pei Zeng China

Marco Brogi Italy

G Pozza Italy

Kelli D. Salter United States

Gianluca Tamagno Italy

Michael J. Zdon United States

Shunichi Higashide Japan

Leila Vaalavirta Finland

Kimihiko Sakamoto Japan

John F. Hennessy United States

Zheng-pei Zeng China

Masayasu Hamaji

132 ×0.5

SURGE

160 ×0.8

EDM

31 ×0.5

ONCOL

43 ×0.8

PRM

71 ×1.2

PHYSI

Citations per year, relative to Masayasu Hamaji Masayasu Hamaji (= 1×) peers Zheng-pei Zeng

Countries citing papers authored by Masayasu Hamaji

Since Specialization

Citations

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

Fields of papers citing papers by Masayasu Hamaji

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Masayasu Hamaji

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

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Chen‐Yoshikawa, Toyofumi F., Daisuke Nakajima, Masayasu Hamaji, et al.. (2018). P2.16-27 Indocyanine Green Virtual Assisted Lung Mapping (ICG-VAL-MAP): Anyone Can Perform a Visible Preoperative Marking Successfully. Journal of Thoracic Oncology. 13(10). S842–S842. 1 indexed citations

Hamaji, Masayasu, et al.. (2000). [A preliminary study on dihydropyrimidine dehydrogenase activity in breast cancer].. PubMed. 27(11). 1719–24. 1 indexed citations

Hamaji, Masayasu, et al.. (1999). Mallory-Weiss Syndrome with Colonic Lavage. A Case Report.. The Japanese Journal of Gastroenterological Surgery. 32(4). 997–1001.

Matsuda, Shuichi, et al.. (1998). CD4- and TCR -positive T Lymphocytes Predominantly Infiltrated into Well--Moderately Differentiated Colon Adenocarcinoma Tissues. Japanese Journal of Clinical Oncology. 28(2). 97–103. 8 indexed citations

Nishida, Toshirou, Kazuyasu Nakao, Masayasu Hamaji, et al.. (1997). Preservation of Recurrent Laryngeal Nerve Invaded by Differentiated Thyroid Cancer. Annals of Surgery. 226(1). 85–91. 86 indexed citations

Nishida, Toshirou, Kazuyasu Nakao, & Masayasu Hamaji. (1997). Differentiated thyroid carcinoma with airway invasion: Indication for tracheal resection based on the extent of cancer invasion. Journal of Thoracic and Cardiovascular Surgery. 114(1). 84–92. 85 indexed citations

Nishida, Toshirou, et al.. (1996). Overexpression of p53 protein and DNA content are important biologic prognostic factors for thyroid cancer. Surgery. 119(5). 568–575. 26 indexed citations

Nakao, Kazuyasu, et al.. (1994). A Case of Intractable Hepatic Lymphorrhea after Gastrectomy for Gastric Cancer.. The Japanese Journal of Gastroenterological Surgery. 27(1). 117–120. 7 indexed citations

Hamaji, Masayasu, et al.. (1993). Noninvasive Adenocarcinoma in Brunner’s Gland Hyperplasia Occurring in the Third Portion of the Duodenum. Digestive Surgery. 10(4). 198–202. 1 indexed citations

10.

Miyazaki, Satoru, Kazuyasu Nakao, Masaaki Nakahara, et al.. (1993). A Case of Congenital Antithrombin III Deficiency Asociated with Extrahepatic Portal Occlusion and Esophgo-Gastric Varices.. The Japanese Journal of Gastroenterological Surgery. 26(3). 889–893. 2 indexed citations

11.

Yonekura, Takeo, Kazuyasu Nakao, Nobuhiro Fujita, et al.. (1991). A Case Report of Multiple Cancers in Colon and Rectum Accompanied with Gastric Cancer.. The Japanese Journal of Gastroenterological Surgery. 24(11). 2814–2818.

12.

Miyata, Masahiko, et al.. (1991). Gastric varices formation due to pancreatic tumor: A case of successful resection of cystadenocarcinoma. Surgery Today. 21(5). 583–586. 2 indexed citations

13.

Hamaji, Masayasu, Y. Kawai, Yasunaru Kawashima, & Masaya Tohyama. (1989). Distribution of peptidergic terminals of enteric origin in the rat celiac ganglion. Neuroscience Letters. 102(2-3). 121–124. 3 indexed citations

14.

Hamaji, Masayasu, Y. Kawai, Yasunaru Kawashima, & Masaya Tohyama. (1989). An electron microscopic study on VIP-, BOM- and CCK-like immunoreactive terminals in the celiac-superior mesenteric ganglion complex of the guinea pig. Brain Research. 488(1-2). 283–287. 7 indexed citations

15.

Sakamoto, Takuya, et al.. (1986). Removal of mesenteric gastrinoma: a case report.. PubMed. 99(2). 245–8. 12 indexed citations

16.

Tanaka, Yasuhiro, Masahiko Miyata, Kazuyasu Nakao, et al.. (1985). TISSUE DISTRIBUTION OF FT-207 FOLLOWING PREOPERATIVE RECTAL ADMINISTRATION. The Japanese Journal of Gastroenterological Surgery. 18(1). 105–112. 1 indexed citations

17.

Izukura, Masaaki, Masahiko Miyata, Masayasu Hamaji, et al.. (1985). INTRAOPERATIVE LOCALIZATION OF INSULINOMA BY QUICK INSULIN RADIOIMMUNOASSAY-A CASE REPORT. The Japanese Journal of Gastroenterological Surgery. 18(11). 2411–2414. 1 indexed citations

18.

Miyata, Masahiko, et al.. (1983). Diagnostic monitoring of plasma levels of glucose and insulin during surgery for insulinoma. Surgery Today. 13(4). 285–295. 1 indexed citations

19.

Hamaji, Masayasu, et al.. (1983). Plasma catecholamine response to hypotension induced by trimethaphan and by sodium nitroprusside during nitrous oxide-oxygen-fentanyl anesthesia.. PubMed. 34(1-2). 37–41. 1 indexed citations

20.

Seki, Tokuichiro & Masayasu Hamaji. (1979). Method for the fluorimetric estimation of dopamine. Journal of Chromatography B Biomedical Sciences and Applications. 162(3). 388–393. 8 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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