Eiji Umegaki

3.6k total citations
154 papers, 2.6k citations indexed

About

Eiji Umegaki is a scholar working on Surgery, Gastroenterology and Pulmonary and Respiratory Medicine. According to data from OpenAlex, Eiji Umegaki has authored 154 papers receiving a total of 2.6k indexed citations (citations by other indexed papers that have themselves been cited), including 95 papers in Surgery, 73 papers in Gastroenterology and 57 papers in Pulmonary and Respiratory Medicine. Recurrent topics in Eiji Umegaki's work include Gastric Cancer Management and Outcomes (42 papers), Gastroesophageal reflux and treatments (37 papers) and Helicobacter pylori-related gastroenterology studies (34 papers). Eiji Umegaki is often cited by papers focused on Gastric Cancer Management and Outcomes (42 papers), Gastroesophageal reflux and treatments (37 papers) and Helicobacter pylori-related gastroenterology studies (34 papers). Eiji Umegaki collaborates with scholars based in Japan, United States and Canada. Eiji Umegaki's co-authors include Kazuhide Higuchi, Mitsuyuki Murano, Satoshi Tokioka, Kiyoshi Ashida, Akira Nishimura, Katsuhiko Iwakiri, Kentarou Kudou, Yukiko Yoda, Eijiro Morita and Naoki Hiramatsu and has published in prestigious journals such as SHILAP Revista de lepidopterología, Gastroenterology and PLoS ONE.

In The Last Decade

Eiji Umegaki

149 papers receiving 2.6k citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Eiji Umegaki Japan	28	1.7k	1.2k	1.0k	431	210	154	2.6k
Masashi Oka Japan	28	2.1k 1.2×	1.2k 1.0×	2.7k 2.6×	419 1.0×	220 1.0×	80	3.6k
Toshihisa Takeuchi Japan	24	1.1k 0.6×	489 0.4×	777 0.8×	439 1.0×	154 0.7×	149	1.7k
Hiromu Kutsumi Japan	28	1.1k 0.7×	459 0.4×	834 0.8×	581 1.3×	268 1.3×	119	2.5k
Yoshiro Saikawa Japan	32	1.2k 0.7×	698 0.6×	1.6k 1.6×	897 2.1×	117 0.6×	139	3.1k
Byung‐Wook Kim South Korea	25	1.3k 0.8×	751 0.6×	1.1k 1.0×	402 0.9×	120 0.6×	195	2.2k
Yang Won Min South Korea	27	1.2k 0.7×	845 0.7×	795 0.8×	394 0.9×	517 2.5×	164	2.4k
Armando Gabbrielli Italy	32	2.0k 1.2×	492 0.4×	790 0.8×	1.4k 3.2×	488 2.3×	114	2.7k
Fernando Carballo Spain	26	1.3k 0.8×	470 0.4×	483 0.5×	602 1.4×	303 1.4×	113	2.1k
Nils Homann Germany	30	1.4k 0.9×	702 0.6×	1.9k 1.8×	1.2k 2.9×	539 2.6×	119	4.1k
Marino Venerito Germany	23	1.1k 0.6×	421 0.4×	622 0.6×	321 0.7×	176 0.8×	100	1.8k

Countries citing papers authored by Eiji Umegaki

Since Specialization

Citations

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

Fields of papers citing papers by Eiji Umegaki

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Eiji Umegaki

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

All Works

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20 of 20 papers shown

Ninomiya, T., et al.. (2025). The Relationship Between Bacterial Flora in Saliva and Esophageal Mucus and Endoscopic Severity in Patients with Eosinophilic Esophagitis. International Journal of Molecular Sciences. 26(7). 3026–3026. 1 indexed citations

Handa, Osamu, et al.. (2023). Reduction of butyric acid-producing bacteria in the ileal mucosa-associated microbiota is associated with the history of abdominal surgery in patients with Crohn’s disease. Redox Report. 28(1). 2241615–2241615. 5 indexed citations

Yoshizaki, Tetsuya, Shinwa Tanaka, Takayuki Ose, et al.. (2023). Assessment of predictive factors associated with the technical difficulty of endoscopic submucosal dissection for superficial esophageal squamous cell carcinoma: Japanese multicenter retrospective study. Digestive Endoscopy. 36(5). 554–564. 3 indexed citations

Murao, Takahisa, et al.. (2021). Evaluation of efficacy and safety of lubiprostone in patients with chronic constipation. Scandinavian Journal of Gastroenterology. 56(10). 1140–1145. 2 indexed citations

Takao, Madoka, Elif Bilgiç, Pepa Kaneva, et al.. (2020). Development and validation of an endoscopic submucosal dissection video assessment tool. Surgical Endoscopy. 35(6). 2671–2678. 4 indexed citations

Toyonaga, Takashi, Yoshiko Nakano, Shinwa Tanaka, et al.. (2020). Endoscopic submucosal dissection involving the anal canal presents a risk factor for postoperative stricture. Surgical Endoscopy. 35(3). 1307–1316. 5 indexed citations

Matsumoto, Hiroshi, Akiko Shiotani, Takahisa Murao, et al.. (2020). Mucosa-Associated Microbiota in Patients with Irritable Bowel Syndrome: A Comparison of Subtypes. Digestion. 102(1). 49–56. 21 indexed citations

Morita, Yoshinori, Yoshiko Nakano, Toshitatsu Takao, et al.. (2018). Successful treatment of an esophageal perforation that occurred during endoscopic submucosal dissection for esophageal cancer using polyglycolic acid sheets and fibrin glue. Clinical Journal of Gastroenterology. 12(1). 29–33. 12 indexed citations

Edogawa, Shoko, Akiko Sakai, Takuya Inoue, et al.. (2014). Down-regulation of collagen I biosynthesis in intestinal epithelial cells exposed to indomethacin: A comparative proteome analysis. Journal of Proteomics. 103. 35–46. 9 indexed citations

10.

Imoto, Akira, Shoko Edogawa, Takeshi Ogura, et al.. (2014). Liver Abscess Caused by CTX-M-55-type Extended-spectrum β-lactamase (ESBL)-producing <i>Salmonella enteritidis</i>. Internal Medicine. 53(15). 1699–1703. 17 indexed citations

11.

Kuramoto, Takanori, Eiji Umegaki, Sadaharu Nouda, et al.. (2013). Preventive effect of irsogladine or omeprazole on non-steroidal anti-inflammatory drug-induced esophagitis, peptic ulcers, and small intestinal lesions in humans, a prospective randomized controlled study. BMC Gastroenterology. 13(1). 85–85. 38 indexed citations

12.

Ogura, Takeshi, Yoshifumi Arisaka, Daisuke Masuda, et al.. (2012). Extremely minimal neuroendocrine tumor of the pancreas with stenosis of main pancreatic duct. Suizo. 27(5). 701–709. 1 indexed citations

13.

Abe, Yosuke, Mitsuyuki Murano, Eijiro Morita, et al.. (2011). Simvastatin Attenuates Intestinal Fibrosis Independent of the Anti-Inflammatory Effect by Promoting Fibroblast/Myofibroblast Apoptosis in the Regeneration/Healing Process from TNBS-Induced Colitis. Digestive Diseases and Sciences. 57(2). 335–344. 45 indexed citations

14.

Umegaki, Eiji, Toshihisa Takeuchi, Mitsuyuki Murano, et al.. (2011). Gastric ulcer healing after treatment of endoscopic submucosal dissection in Japanese: comparison of H2 receptor antagonist and proton pump inhibitor administration. Journal of Clinical Biochemistry and Nutrition. 49(3). 216–221. 8 indexed citations

15.

Kakimoto, Kazuki, Shinji Takai, Mitsuyuki Murano, et al.. (2009). Significance of Chymase-Dependent Matrix Metalloproteinase-9 Activation on Indomethacin-Induced Small Intestinal Damages in Rats. Journal of Pharmacology and Experimental Therapeutics. 332(2). 684–689. 27 indexed citations

16.

Umegaki, Eiji, Shinya Abe, Satoshi Tokioka, et al.. (2009). Risk Management for Gastrointestinal Endoscopy in Elderly Patients: Questionnaire for Patients Undergoing Gastrointestinal Endoscopy. Journal of Clinical Biochemistry and Nutrition. 46(1). 73–80. 17 indexed citations

17.

Murano, Mitsuyuki, Kazuki Kakimoto, Toshihiko Okada, et al.. (2008). THERAPEUTIC EFFECT OF SHI-219, A NOVEL WATER SOLUBLE PRODRUG OF EG626 (PHTALAZINOL), ON MOUSE DEXTRAN SODIUM SULFATE-INDUCED COLITIS. 35(2). 180–183. 2 indexed citations

18.

Egashira, Yutaro, Mototsugu Fujii, Toshikatsu Nitta, et al.. (2008). Establishment of Pathological Indications and Criteria for Further Resection After Endoscopic Resection of Submucosally Invasive Gastric Cancer. 43(1). 11–22. 1 indexed citations

19.

Umegaki, Eiji. (2006). STEREOSCOPIC MICROSCOPY FOR GASTROINTESTINAL MUCOSAL RESECTION SPECIMENS. Acta gastro-enterologica belgica. 48(1). 70–78. 1 indexed citations

20.

Hamamoto, Norihiro, Yutaro Egashira, Chikao Shimamoto, et al.. (1994). A CASE OF JUVENILE POLYPOSIS LOCALIZED IN THE STOMACH ACCOMPANIED BY GASTRIC CANCER. Acta gastro-enterologica belgica. 36(11).

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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