Youichi Kumagai

2.8k total citations · 1 hit paper
104 papers, 2.1k citations indexed

About

Youichi Kumagai is a scholar working on Surgery, Pulmonary and Respiratory Medicine and Oncology. According to data from OpenAlex, Youichi Kumagai has authored 104 papers receiving a total of 2.1k indexed citations (citations by other indexed papers that have themselves been cited), including 72 papers in Surgery, 55 papers in Pulmonary and Respiratory Medicine and 34 papers in Oncology. Recurrent topics in Youichi Kumagai's work include Esophageal Cancer Research and Treatment (47 papers), Gastric Cancer Management and Outcomes (32 papers) and Metastasis and carcinoma case studies (15 papers). Youichi Kumagai is often cited by papers focused on Esophageal Cancer Research and Treatment (47 papers), Gastric Cancer Management and Outcomes (32 papers) and Metastasis and carcinoma case studies (15 papers). Youichi Kumagai collaborates with scholars based in Japan, United States and Greece. Youichi Kumagai's co-authors include Tatsuyuki Kawano, Haruhiro Inoue, Kenro Kawada, Tomohiro Tada, Tsuyoshi Ozawa, Soichiro Ishihara, Mitsuhiro Fujishiro, Toru Ishiguro, Hideyuki Ishida and Takehisa Iwai and has published in prestigious journals such as PLoS ONE, Scientific Reports and The Lancet Oncology.

In The Last Decade

Youichi Kumagai

89 papers receiving 2.0k citations

Hit Papers

align trajectories

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.

Diagnostic outcomes of esophageal cancer by artificial intelligence using convolutional neural networks

2018 321 citations Youichi Kumagai, Tomohiro Tada et al. profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Youichi Kumagai Japan	21	1.2k	1.2k	704	315	305	104	2.1k
Tomohiro Tsuchida Japan	26	1.4k 1.1×	1.8k 1.6×	612 0.9×	326 1.0×	669 2.2×	101	2.4k
Satoki Shichijo Japan	23	1.4k 1.2×	1.8k 1.5×	1.1k 1.6×	608 1.9×	602 2.0×	119	2.7k
Wouter L. Curvers Netherlands	35	3.6k 2.9×	3.1k 2.6×	814 1.2×	329 1.0×	694 2.3×	139	4.4k
Deepa T. Patil United States	21	1.2k 1.0×	1.0k 0.9×	784 1.1×	139 0.4×	235 0.8×	110	2.2k
Andreas Probst Germany	24	1.0k 0.8×	1.5k 1.2×	616 0.9×	177 0.6×	592 1.9×	121	2.1k
Fumio Ishida Japan	25	773 0.6×	874 0.7×	1.3k 1.8×	369 1.2×	221 0.7×	130	2.0k
Hiroaki Ikematsu Japan	27	1.8k 1.5×	3.1k 2.6×	2.1k 3.0×	299 0.9×	842 2.8×	166	3.9k
Tudorel Ciurea Romania	18	677 0.6×	372 0.3×	785 1.1×	387 1.2×	127 0.4×	86	1.4k
Maria O’Donovan United Kingdom	26	1.4k 1.1×	918 0.8×	509 0.7×	111 0.4×	243 0.8×	58	2.1k
Toyoki Kudo Japan	24	523 0.4×	884 0.7×	1.3k 1.9×	488 1.5×	230 0.8×	78	1.8k

Countries citing papers authored by Youichi Kumagai

Since Specialization

Citations

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

Fields of papers citing papers by Youichi Kumagai

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Youichi Kumagai

This figure shows the co-authorship network connecting the top 25 collaborators of Youichi Kumagai. A scholar is included among the top collaborators of Youichi Kumagai 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 Youichi Kumagai. Youichi Kumagai 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

Ogura, Toshiro, et al.. (2025). Nutritional benefits of pancreas‐sparing total duodenectomy for severe duodenal polyposis in patients with familial adenomatous polyposis. Annals of Gastroenterological Surgery. 9(4). 822–829.

Kumagai, Youichi, Kaiyo Takubo, T. Sato, et al.. (2022). AI analysis and modified type classification for endocytoscopic observation of esophageal lesions. Diseases of the Esophagus. 35(9). 8 indexed citations

Fukuchi, Minoru, Erito Mochiki, Toru Ishiguro, et al.. (2017). Efficacy of Conversion Surgery Following S-1 plus Cisplatin or Oxaliplatin Chemotherapy for Unresectable Gastric Cancer. Anticancer Research. 37(3). 1343–1348. 10 indexed citations

Ogura, Toshiro, Toru Ishiguro, Yu Muta, et al.. (2016). [A Family with Peutz-Jeghers Syndrome Having Various Malignant Diseases].. PubMed. 43(12). 2133–2135. 1 indexed citations

Kumagai, Youichi, et al.. (2016). Association between Blood Flow of the Gastric Tube Using Intraoperative ICG Fluorescence Imaging and Postoperative Endoscopic Findings of the Gastric Tube in Esophagectomy. Nihon Kikan Shokudoka Gakkai Kaiho. 67(6). 386–391.

Onozawa, Hisashi, Minoru Fukuchi, Okihide Suzuki, et al.. (2014). [Significance of the granulocyte-to-lymphocyte ratio as a prognostic predictor in patients with stage IV colorectal cancer undergoing chemotherapy].. PubMed. 41(10). 1307–9. 1 indexed citations

Kawada, Kenro, Tatsuyuki Kawano, Yasuaki Nakajima, et al.. (2014). Long-term Follow-up after Complete Ablation of Early Esophageal Squamous Cell Carcinoma with Argon Plasma Coagulation. Nihon Kikan Shokudoka Gakkai Kaiho. 65(4). 314–321.

Kumagai, Youichi, Jun Sobajima, Morihiro Higashi, et al.. (2014). Angiogenesis in Superficial Esophageal Squamous Cell Carcinoma: Assessment of Microvessel Density Based on Immunostaining for CD34 and CD105. Japanese Journal of Clinical Oncology. 44(6). 526–533. 22 indexed citations

Kumagai, Youichi, Masakazu Toi, Kenro Kawada, & Tatsuyuki Kawano. (2012). Angiogenesis in superficial esophageal squamous cell carcinoma: Magnifying endoscopic observation and molecular analysis. Acta gastro-enterologica belgica. 54(7). 2062–2072. 8 indexed citations

10.

Kumagai, Youichi, Junko Aida, Takanori Ochiai, et al.. (2012). A case of superficial spreading mucoepidermoid cancer of the esophagus. Nihon Rinsho Geka Gakkai Zasshi (Journal of Japan Surgical Association). 73(9). 2251–2257. 1 indexed citations

11.

Kumagai, Youichi, Kenro Kawada, Shigeru Yamazaki, et al.. (2012). Current status and limitations of the newly developed endocytoscope GIF‐Y0002 with reference to its diagnostic performance for common esophageal lesions. Journal of Digestive Diseases. 13(8). 393–400. 20 indexed citations

12.

Igari, Kimihiro, et al.. (2011). THE RISK ASSESSMENT OF SURGERY FOR GASTROINTESTINAL CANCER IN PATIENTS OF AGE 80 OR OVER. Nihon Rinsho Geka Gakkai Zasshi (Journal of Japan Surgical Association). 72(7). 1659–1666.

13.

Kumagai, Youichi, Keiko Miura, Kimihiro Igari, et al.. (2011). Simultaneous resection of metastatic melanoma in the esophagus and primary cutaneous melanoma showing partial regression: report of a case. Surgery Today. 42(9). 884–890. 3 indexed citations

14.

Aida, Junko, Michael Vieth, Christian Ell, et al.. (2011). Palisade Vessels as a New Histologic Marker of Esophageal Origin in ER Specimens From Columnar-Lined Esophagus. The American Journal of Surgical Pathology. 35(8). 1140–1145. 21 indexed citations

15.

Igari, Kimihiro, et al.. (2010). Two Cases of Hemosuccus Pancreaticus. The Japanese Journal of Gastroenterological Surgery. 43(12). 1246–1251. 2 indexed citations

16.

Igari, Kimihiro, T. Ochiai, Arihiro Aihara, et al.. (2010). Clinical presentation of obturator hernia and review of the literature. Hernia. 14(4). 409–413. 36 indexed citations

17.

Kumagai, Youichi, Kenro Kawada, Shigeru Yamazaki, et al.. (2009). ENDOCYTOSCOPIC OBSERVATION OF ESOPHAGEAL SQUAMOUS CELL CARCINOMA. Digestive Endoscopy. 22(1). 10–16. 22 indexed citations

18.

Igari, Kimihiro, et al.. (2008). A CASE OF ILEAL CARCINOID PREOPERATIVELY DIAGNOSED BY A DOUBLE BALLOON INTESTINAL ENDOSCOPY. Nihon Rinsho Geka Gakkai Zasshi (Journal of Japan Surgical Association). 69(8). 2007–2010.

19.

Kumagai, Youichi, Masakazu Toi, & Haruhiro Inoue. (2002). Dynamism of tumour vasculature in the early phase of cancer progression: outcomes from oesophageal cancer research. The Lancet Oncology. 3(10). 604–610. 95 indexed citations

20.

Kumagai, Youichi, et al.. (1993). Computer Graphics for Landscape Planning with Japanese Art Technics. Journal of the Japanese Institute of Landscape Architects. 57(5). 265–270. 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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