Kei Ito

3.8k total citations
187 papers, 2.5k citations indexed

About

Kei Ito is a scholar working on Surgery, Oncology and Pulmonary and Respiratory Medicine. According to data from OpenAlex, Kei Ito has authored 187 papers receiving a total of 2.5k indexed citations (citations by other indexed papers that have themselves been cited), including 149 papers in Surgery, 121 papers in Oncology and 115 papers in Pulmonary and Respiratory Medicine. Recurrent topics in Kei Ito's work include Pancreatic and Hepatic Oncology Research (100 papers), Gallbladder and Bile Duct Disorders (95 papers) and Pediatric Hepatobiliary Diseases and Treatments (61 papers). Kei Ito is often cited by papers focused on Pancreatic and Hepatic Oncology Research (100 papers), Gallbladder and Bile Duct Disorders (95 papers) and Pediatric Hepatobiliary Diseases and Treatments (61 papers). Kei Ito collaborates with scholars based in Japan, United States and United Kingdom. Kei Ito's co-authors include Yutaka Noda, Naotaka Fujita, Go Kobayashi, Jun Horaguchi, Yoshihide Kanno, Osamu Takasawa, Shinsuke Koshita, Takashi Obana, Takahisa Ogawa and Kaori Masu and has published in prestigious journals such as SHILAP Revista de lepidopterología, Neurology and Scientific Reports.

In The Last Decade

Kei Ito

172 papers receiving 2.4k citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Kei Ito Japan	26	2.0k	1.6k	1.6k	211	133	187	2.5k
Yoshiya Fujimoto Japan	29	1.7k 0.9×	2.1k 1.3×	773 0.5×	117 0.6×	265 2.0×	95	2.5k
Kazumichi Kawakubo Japan	30	2.2k 1.1×	1.5k 0.9×	1.8k 1.1×	353 1.7×	56 0.4×	146	2.8k
Aristotelis Perrakis Germany	20	1.0k 0.5×	1.2k 0.8×	795 0.5×	107 0.5×	130 1.0×	82	1.8k
Takaaki Chikugo Japan	19	688 0.4×	895 0.5×	444 0.3×	295 1.4×	114 0.9×	84	1.3k
Teruo Kakegawa Japan	29	2.3k 1.2×	994 0.6×	2.0k 1.2×	193 0.9×	186 1.4×	168	3.2k
Ichiro Hirai Japan	20	919 0.5×	936 0.6×	464 0.3×	269 1.3×	91 0.7×	66	1.4k
Robert H. Schapiro United States	23	1.6k 0.8×	860 0.5×	977 0.6×	348 1.6×	193 1.5×	46	2.2k
A. Heintz Germany	22	1.2k 0.6×	1.1k 0.7×	389 0.2×	64 0.3×	86 0.6×	102	1.7k
Brigitte Schumacher Germany	26	1.8k 0.9×	661 0.4×	1.8k 1.1×	154 0.7×	803 6.0×	92	2.7k
Jorma Halttunen Finland	24	1.7k 0.9×	851 0.5×	1.0k 0.6×	68 0.3×	153 1.2×	87	2.1k

Countries citing papers authored by Kei Ito

Since Specialization

Citations

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

Fields of papers citing papers by Kei Ito

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Kei Ito

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

Ogawa, Takahisa, Shinsuke Koshita, Yoshihide Kanno, et al.. (2025). Incidence and risk factors for recurrence of common bile duct stones in patients undergoing endoscopic extraction without prophylactic biliary stenting and subsequent cholecystectomy: a retrospective study in Japan. Clinical Endoscopy. 59(1). 124–131.

Kawakami, Y, Shinsuke Koshita, Yoshihide Kanno, et al.. (2023). Pancreatic ductal adenocarcinomas concomitant with intraductal papillary mucinous neoplasms of the pancreas: A investigation of those clinicopathological features by analyzing 48 patients who underwent surgery for those lesions. Pancreatology. 23(6). 674–681. 1 indexed citations

Sato, Ryuichiro, Masaya Oikawa, Tetsuya Kakita, et al.. (2022). Prognostic significance of the mean corpuscular volume (MCV) and red cell distribution width (RDW) in obstructive colorectal cancer patients with a stent inserted as a bridge to curative surgery. Surgery Today. 52(12). 1699–1710. 3 indexed citations

Ogura, Takeshi, Takaaki Eguchi, Kazunari Nakahara, et al.. (2021). Clinical impact of recombinant thrombomodulin administration on disseminated intravascular coagulation due to severe acute cholangitis (Recover‐AC study). Journal of Hepato-Biliary-Pancreatic Sciences. 30(2). 221–228. 5 indexed citations

Ito, Kei, et al.. (2021). Safety of biliary stent placement followed by definitive chemoradiotherapy in patients with pancreatic cancer with bile duct obstruction. Journal of Gastrointestinal Oncology. 12(5). 2260–2267. 2 indexed citations

Sugita, Reiji, Kei Ito, & Yutaka Noda. (2020). Value of pancreatic and biliary flow MR imaging in the evaluation of pancreaticobiliary disorders. Japanese Journal of Radiology. 38(6). 507–515.

Horaguchi, Jun, Naotaka Fujita, Yutaka Noda, et al.. (2012). Metallic stent deployment in endosonography‐guided biliary drainage: Long‐term follow‐up results in patients with bilio‐enteric anastomosis. Digestive Endoscopy. 24(6). 457–461. 14 indexed citations

Ogawa, Takahisa, Jun Horaguchi, Naotaka Fujita, et al.. (2012). High b-value diffusion-weighted magnetic resonance imaging for gallbladder lesions: differentiation between benignity and malignancy. Journal of Gastroenterology. 47(12). 1352–1360. 53 indexed citations

Ito, Kei, et al.. (2011). Extracorporeal Shock Wave Therapy Induces Therapeutic Lymphangiogenesis in a Rat Model of Secondary Lymphoedema. European Journal of Vascular and Endovascular Surgery. 42(2). 254–260. 58 indexed citations

10.

Ito, Kei, Naotaka Fujita, Yutaka Noda, et al.. (2010). Can pancreatic duct stenting prevent post-ERCP pancreatitis in patients who undergo pancreatic duct guidewire placement for achieving selective biliary cannulation? A prospective randomized controlled trial. Journal of Gastroenterology. 45(11). 1183–1191. 106 indexed citations

11.

Kobayashi, Go, Naotaka Fujita, Yutaka Noda, et al.. (2010). Intraductal papillary mucinous neoplasms of the pancreas showing fistula formation into other organs. Journal of Gastroenterology. 45(10). 1080–1089. 44 indexed citations

12.

Ogawa, Takahisa, Jun Horaguchi, Naotaka Fujita, et al.. (2010). Peroral pancreatoscopic images of the site of mechanical penetration of the choledochus combined with narrow-band imaging in a patient with main duct intraductal papillary mucinous neoplasm of the pancreas. Gastrointestinal Endoscopy. 73(3). 627–629. 2 indexed citations

13.

Ito, Kei, Naotaka Fujita, Yutaka Noda, et al.. (2008). EFFICACY AND SAFETY OF PROPHYLACTIC PANCREATIC DUCT STENT (PIT-STENT) PLACEMENT IN PATIENTS AT HIGH RISK OF POST-ERCP PANCREATITIS. Acta gastro-enterologica belgica. 50(10). 2730–2734. 1 indexed citations

14.

Ito, Kei, Naotaka Fujita, Yutaka Noda, et al.. (2008). Pancreatic guidewire placement for achieving selective biliary cannulation during endoscopic retrograde cholangio-pancreatography. World Journal of Gastroenterology. 14(36). 5595–5595. 54 indexed citations

15.

Ito, Kei, Naotaka Fujita, Yutaka Noda, et al.. (2007). Preoperative evaluation of ampullary neoplasm with EUS and transpapillary intraductal US: a prospective and histopathologically controlled study. Gastrointestinal Endoscopy. 66(4). 740–747. 102 indexed citations

16.

Takasawa, Osamu, Yutaka Noda, Go Kobayashi, et al.. (2006). A CASE OF SMALL PANCREATIC CANCER WITHOUT PANCREATIC DUCT DILATATION DIAGNOSED PREOPERATIVELY BY INTRA-DUCTAL FORCEPS BIOPSY AND CYTOLOGY. Acta gastro-enterologica belgica. 48(8). 1585–1591. 1 indexed citations

17.

Ito, Kei, Naotaka Fujita, Yutaka Noda, et al.. (2005). CASE OF EARLY AMPULLARY CANCER TREATED BY ENDOSCOPIC PAPILLECTOMY. Acta gastro-enterologica belgica. 47(1). 66–72. 1 indexed citations

18.

Fujita, Naotaka, et al.. (2005). Surveillance of intraductal papillary-mucinous neoplasms of the pancreas (IPMN). Suizo. 20(6). 532–537.

19.

Ito, Kei, Naotaka Fujita, Yutaka Noda, et al.. (2005). EFFICACY OF PROPHYLACTIC PANCREATIC DUCT STENTING IN HIGH-RISK PATIENTS OF POST-ERCP PANCREATITIS. Acta gastro-enterologica belgica. 47(4). 1005–1009.

20.

Fujita, Naotaka, et al.. (2001). SCRATCH-STICK-METHOD FOR ENDOSCOPIC MUCOSAL RESECTION OF COLORECTAL TUMORS. Acta gastro-enterologica belgica. 43(9). 1821–1827. 7 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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