Ken Hirao

794 total citations
42 papers, 566 citations indexed

About

Ken Hirao is a scholar working on Surgery, Pulmonary and Respiratory Medicine and Oncology. According to data from OpenAlex, Ken Hirao has authored 42 papers receiving a total of 566 indexed citations (citations by other indexed papers that have themselves been cited), including 31 papers in Surgery, 23 papers in Pulmonary and Respiratory Medicine and 21 papers in Oncology. Recurrent topics in Ken Hirao's work include Gallbladder and Bile Duct Disorders (16 papers), Pancreatic and Hepatic Oncology Research (14 papers) and Cholangiocarcinoma and Gallbladder Cancer Studies (9 papers). Ken Hirao is often cited by papers focused on Gallbladder and Bile Duct Disorders (16 papers), Pancreatic and Hepatic Oncology Research (14 papers) and Cholangiocarcinoma and Gallbladder Cancer Studies (9 papers). Ken Hirao collaborates with scholars based in Japan, United Kingdom and Greece. Ken Hirao's co-authors include Tsuneyoshi Ogawa, Hironari Kato, Etsuji Ishida, Hirofumi Kawamoto, Osamu Mizuno, Ryo Harada, Koichiro Tsutsumi, Masakuni Fujii, Naoko Kurihara and Hirotoshi Fukatsu and has published in prestigious journals such as PLoS ONE, Radiology and European Journal of Cancer.

In The Last Decade

Ken Hirao

40 papers receiving 554 citations

Peers

Ken Hirao
Stefano D’Ugo Italy
Yukihiro Tatekawa Japan
J Liebetruth Germany
Lana Bijelić United States
M Ionescu Romania
Kazuaki Hazama Japan
T.M. van Gulik Netherlands
H. Stridbeck Sweden
Eric Fontaumard France
Susumu Sueyoshi Japan
Stefano D’Ugo Italy
Ken Hirao
Citations per year, relative to Ken Hirao Ken Hirao (= 1×) peers Stefano D’Ugo

Countries citing papers authored by Ken Hirao

Since Specialization
Citations

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

Fields of papers citing papers by Ken Hirao

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Ken Hirao

This figure shows the co-authorship network connecting the top 25 collaborators of Ken Hirao. A scholar is included among the top collaborators of Ken Hirao 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 Ken Hirao. Ken Hirao 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.
Tomoda, Takeshi, Hironari Kato, Toru Ueki, et al.. (2021). Efficacy of double‐balloon enteroscopy‐assisted endoscopic balloon dilatation combined with stent deployment for hepaticojejunostomy anastomotic stricture. Digestive Endoscopy. 34(3). 604–611. 13 indexed citations
2.
Nakanishi, Kazuyoshi, Yasushi Fujiwara, Kiyotaka Yamada, et al.. (2021). Quantitative evaluation of abnormal finger movements in myelopathy hand during the grip and release test using gyro sensors. PLoS ONE. 16(10). e0258808–e0258808. 6 indexed citations
3.
Tsutsumi, Koichiro, Hironari Kato, Ken Hirao, et al.. (2017). Comparison of two fluoroscopic images to ensure efficient scope insertion for biliary intervention in patients with Roux-en-Y hepaticojejunostomy. Endoscopy. 49(12). 1256–1261. 3 indexed citations
4.
Tsutsumi, Koichiro, Hirofumi Kawamoto, Ken Hirao, et al.. (2012). Monitoring of CA19-9 and SPan-1 can facilitate the earlier confirmation of progressing pancreatic cancer during chemotherapy. Pancreatology. 12(5). 409–416. 20 indexed citations
5.
Hirao, Ken, Hirofumi Kawamoto, Ichiro Sakakihara, et al.. (2011). A 4-week versus a 3-week schedule of gemcitabine monotherapy for advanced pancreatic cancer: a randomized phase II study to evaluate toxicity and dose intensity. International Journal of Clinical Oncology. 16(6). 637–645. 7 indexed citations
6.
Iwamuro, Masaya, Hirofumi Kawamoto, Ryo Harada, et al.. (2010). COMBINED DUODENAL STENT PLACEMENT AND ENDOSCOPIC ULTRASONOGRAPHY‐GUIDED BILIARY DRAINAGE FOR MALIGNANT DUODENAL OBSTRUCTION WITH BILIARY STRICTURE. Digestive Endoscopy. 22(3). 236–240. 48 indexed citations
7.
8.
Kato, Hironari, Hirofumi Kawamoto, Koichiro Tsutsumi, et al.. (2009). Long-term outcomes of endoscopic management for biliary strictures after living donor liver transplantation with duct-to-duct reconstruction. Transplant International. 22(9). 914–921. 65 indexed citations
9.
Aoyama, Ikuo, Etsuji Ishida, Kazuhiro Matsueda, et al.. (2008). TWO CASES OF SUCCESSFUL ENDOSCOPIC INTERVENTION FOR MEDIASTINAL PANCREATIC PSEUDOCYSTS. Acta gastro-enterologica belgica. 50(11). 2859–2865. 1 indexed citations
10.
Fukatsu, Hirotoshi, Hirofumi Kawamoto, Ryo Harada, et al.. (2008). Quantitative assessment of technical proficiency in performing needle-knife precut papillotomy. Surgical Endoscopy. 23(9). 2066–2072. 24 indexed citations
11.
Harada, Ryo, Hirofumi Kawamoto, Hirotoshi Fukatsu, et al.. (2008). Perforation of jejunum induced by the deployment of a temporary prophylactic pancreatic stent in the patient with peritonitis carcinomatosa. Clinical Journal of Gastroenterology. 1(2). 80–82. 2 indexed citations
12.
Arai, Osamu, et al.. (2008). [ case of autoimmune pancreatitis with various extrapancreatic fibrosclerosis followed by malignant diseases].. PubMed. 105(5). 711–8. 2 indexed citations
13.
Kawamoto, Hirofumi, Koichiro Tsutsumi, Masakuni Fujii, et al.. (2007). Endoscopic 3-branched partial stent-in-stent deployment of metallic stents in high-grade malignant hilar biliary stricture (with videos). Gastrointestinal Endoscopy. 66(5). 1030–1037. 54 indexed citations
14.
Fukatsu, Hirotoshi, Haruo Kawamoto, Masamitsu Fujii, et al.. (2007). Periampullary carcinoid tumor. Endoscopy. 39(S 1). E49–E50. 7 indexed citations
15.
Fukatsu, Hirotoshi, Hirofumi Kawamoto, Kosuke Tsutsumi, et al.. (2007). Intraductal tubular adenoma, pyloric gland-type, of the pancreas. Endoscopy. 39(S 1). E88–E89. 8 indexed citations
16.
Kawamoto, Hirofumi, Koichiro Tsutsumi, Masazumi Fujii, et al.. (2007). Multiple stenting in a patient with a high-grade malignant hilar biliary stricture: endoscopic four-branched partial stent-in-stent deployment of metallic stents. Endoscopy. 39(S 1). E167–E168. 4 indexed citations
17.
Kubo, Tadahiko, Takashi Sugita, Shoji Shimose, et al.. (2005). Nerve tolerance to high-dose-rate brachytherapy in patients with soft tissue sarcoma: a retrospective study. BMC Cancer. 5(1). 79–79. 8 indexed citations
18.
Moriwaki, Toshikazu, Ichinosuke Hyodo, Tomohiro Nishina, et al.. (2005). A phase I study of doxifluridine combined with weekly paclitaxel for metastatic gastric cancer. Cancer Chemotherapy and Pharmacology. 56(2). 138–144. 6 indexed citations
19.
Hyodo, Ichinosuke, Tomohiro Nishina, Toshikazu Moriwaki, et al.. (2003). A phase I study of S-1 combined with weekly cisplatin for metastatic gastric cancer in an outpatient setting. European Journal of Cancer. 39(16). 2328–2333. 22 indexed citations
20.
Mori, Harushi, et al.. (1989). Exophytic spread of hepatobiliary disease via perihepatic ligaments: demonstration with CT and US.. Radiology. 172(1). 41–46. 13 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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