Hiroyuki Isayama

19.4k total citations
467 papers, 11.8k citations indexed

About

Hiroyuki Isayama is a scholar working on Surgery, Pulmonary and Respiratory Medicine and Oncology. According to data from OpenAlex, Hiroyuki Isayama has authored 467 papers receiving a total of 11.8k indexed citations (citations by other indexed papers that have themselves been cited), including 395 papers in Surgery, 299 papers in Pulmonary and Respiratory Medicine and 270 papers in Oncology. Recurrent topics in Hiroyuki Isayama's work include Gallbladder and Bile Duct Disorders (256 papers), Pancreatic and Hepatic Oncology Research (242 papers) and Pediatric Hepatobiliary Diseases and Treatments (167 papers). Hiroyuki Isayama is often cited by papers focused on Gallbladder and Bile Duct Disorders (256 papers), Pancreatic and Hepatic Oncology Research (242 papers) and Pediatric Hepatobiliary Diseases and Treatments (167 papers). Hiroyuki Isayama collaborates with scholars based in Japan, United States and South Korea. Hiroyuki Isayama's co-authors include Yousuke Nakai, Kazuhiko Koike, Hirofumi Kogure, Minoru Tada, Naoki Sasahira, Kenji Hirano, Masao Omata, Natsuyo Yamamoto, Takeshi Tsujino and Tsuyoshi Hamada and has published in prestigious journals such as Journal of Clinical Oncology, SHILAP Revista de lepidopterología and Gastroenterology.

In The Last Decade

Hiroyuki Isayama

450 papers receiving 11.6k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Hiroyuki Isayama Japan 57 9.7k 7.6k 6.6k 1.4k 791 467 11.8k
Minoru Tada Japan 48 6.5k 0.7× 3.9k 0.5× 5.2k 0.8× 1.6k 1.2× 781 1.0× 258 8.6k
William R. Brugge United States 65 10.4k 1.1× 4.0k 0.5× 9.6k 1.5× 3.5k 2.5× 973 1.2× 292 13.8k
Emmanuel Tiret France 45 7.9k 0.8× 3.2k 0.4× 7.5k 1.1× 721 0.5× 771 1.0× 211 11.3k
Kenji Yamao Japan 53 8.1k 0.8× 4.3k 0.6× 8.6k 1.3× 2.7k 2.0× 452 0.6× 286 12.0k
Michael G. Haddock United States 50 5.3k 0.5× 4.1k 0.5× 4.1k 0.6× 1.1k 0.8× 289 0.4× 260 8.9k
Naoki Sasahira Japan 43 4.6k 0.5× 3.2k 0.4× 3.1k 0.5× 1.1k 0.8× 753 1.0× 289 5.9k
Jean‐Robert Delpéro France 55 5.0k 0.5× 3.4k 0.5× 6.1k 0.9× 1.6k 1.2× 192 0.2× 296 8.6k
Hirofumi Kogure Japan 40 5.0k 0.5× 4.0k 0.5× 3.2k 0.5× 722 0.5× 382 0.5× 295 6.0k
Leonard L. Gunderson United States 66 13.7k 1.4× 10.5k 1.4× 11.6k 1.8× 1.1k 0.8× 436 0.6× 218 20.6k
W. Douglas Wong United States 57 6.1k 0.6× 1.7k 0.2× 7.0k 1.1× 1.1k 0.8× 596 0.8× 105 9.0k

Countries citing papers authored by Hiroyuki Isayama

Since Specialization
Citations

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

Fields of papers citing papers by Hiroyuki Isayama

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Hiroyuki Isayama

This figure shows the co-authorship network connecting the top 25 collaborators of Hiroyuki Isayama. A scholar is included among the top collaborators of Hiroyuki Isayama 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 Hiroyuki Isayama. Hiroyuki Isayama 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.
Ishii, Shigeto, Toshio Fujisawa, Keiko Takahashi, et al.. (2025). Development of a Dedicated X-Ray Fluoroscopic Apparatus for Therapeutic Pancreatobiliary Endoscopy: A Review. Journal of Clinical Medicine. 14(4). 1214–1214.
2.
Ishibashi, Rei, Masahiro Hata, Yukiko Oya, et al.. (2025). Safety and Effectiveness of Colonic Stenting for Ileocecal Valve Obstruction and Usefulness of Two-Step Strategy: Single-Center Retrospective Study. Journal of Clinical Medicine. 14(3). 826–826.
3.
Saito, Kei, Yousuke Nakai, Takashi Sasaki, et al.. (2024). Impact of Statin Use on Survival in Patients With Unresectable Pancreatic cancer Receiving Gemcitabine Plus Nab-Paclitaxel. Pancreas. 54(2). e107–e113. 1 indexed citations
4.
Murakami, Takashi, Hiroyuki Isayama, Satoshi Ikeda, et al.. (2024). A New Self-Expandable Metallic Stent with Low Axial Force and a High Axial Force Zero-Border Shows a Very Low Perforation Rate in Malignant Colorectal Obstruction: A Japanese Multicenter Prospective Study. Journal of Clinical Medicine. 13(17). 5102–5102. 1 indexed citations
5.
Isayama, Hiroyuki, Yousuke Nakai, Koji Matsuda, et al.. (2024). Proposal of classification and terminology of interventional endoscopic ultrasonography/endosonography. Digestive Endoscopy. 37(1). 5–17. 5 indexed citations
6.
Nakai, Yousuke, Tsuyoshi Hamada, Hideyuki Shiomi, et al.. (2023). Time to think prime times for treatment of necrotizing pancreatitis: Pendulum conundrum. Digestive Endoscopy. 35(6). 700–710. 6 indexed citations
7.
Takahashi, Sho, Toshio Fujisawa, & Hiroyuki Isayama. (2023). Trans‐delivery system injection method for deployment of a lumen‐apposing metal stent in a walled‐off necrosis occupied by massive necrotic tissue. Digestive Endoscopy. 35(7). e134–e135.
8.
Fukumura, Yuki, et al.. (2022). Precursor Lesions of Gallbladder Carcinoma: Disease Concept, Pathology, and Genetics. Diagnostics. 12(2). 341–341. 10 indexed citations
9.
Watanabe, Takeo, Yousuke Nakai, Suguru Mizuno, et al.. (2021). Prognosis of primary sclerosing cholangitis according to age of onset. Journal of Hepato-Biliary-Pancreatic Sciences. 28(12). 1115–1120. 2 indexed citations
10.
Tanaka, Masafumi, Shogo Seo, Shigeto Ishii, et al.. (2021). Endoscopic ultrasound-guided pancreatic drainage for treating a traumatic main pancreatic duct injury in a child. Journal of Pediatric Surgery Case Reports. 70. 101886–101886. 1 indexed citations
11.
Fujisawa, Toshio, Shigeto Ishii, Akinori Suzuki, et al.. (2021). Risk Factors for Stent Migration into the Abdominal Cavity after Endoscopic Ultrasound-Guided Hepaticogastrostomy. Journal of Clinical Medicine. 10(14). 3111–3111. 20 indexed citations
12.
Ishigaki, Kazunaga, Yousuke Nakai, Hiroki Oyama, et al.. (2020). Endoscopic Ultrasound-Guided Tissue Acquisition by 22-Gauge Franseen and Standard Needles for Solid Pancreatic Lesions. Gut and Liver. 14(6). 817–825. 20 indexed citations
13.
Nakai, Yousuke, Hirofumi Kogure, Hiroyuki Isayama, & Kazuhiko Koike. (2018). Endoscopic Ultrasound-Guided Biliary Drainage for Unresectable Hilar Malignant Biliary Obstruction. Clinical Endoscopy. 52(3). 220–225. 36 indexed citations
14.
Miyabayashi, Koji, Hideaki Ijichi, Dai Mohri, et al.. (2013). Erlotinib Prolongs Survival in Pancreatic Cancer by Blocking Gemcitabine-Induced MAPK Signals. Cancer Research. 73(7). 2221–2234. 40 indexed citations
15.
Yoshida, Shuntaro, Hiroyuki Isayama, & Kazuhiko Koike. (2013). Techniques of metallic stent placement for malignant colorectal obstruction. Acta gastro-enterologica belgica. 55(2). 306–315. 1 indexed citations
16.
Matsubara, Saburo, Minoru Tada, Masaaki Akahane, et al.. (2012). Incidental Pancreatic Cysts Found by Magnetic Resonance Imaging and Their Relationship With Pancreatic Cancer. Pancreas. 41(8). 1241–1246. 43 indexed citations
17.
Kawakubo, Kazumichi, Hiroyuki Isayama, Naoki Sasahira, et al.. (2012). Clinical utility of single‐operator cholangiopancreatoscopy using a SpyGlass probe through an endoscopic retrograde cholangiopancreatography catheter. Journal of Gastroenterology and Hepatology. 27(8). 1371–1376. 13 indexed citations
18.
Park, Soo Jung, Jin Hong Kim, Jae Chul Hwang, et al.. (2012). Factors Predictive of Adverse Events Following Endoscopic Papillary Large Balloon Dilation: Results from a Multicenter Series. Digestive Diseases and Sciences. 58(4). 1100–1109. 82 indexed citations
19.
Hirano, Keiichi, Minoru Tada, Naoki Sasahira, et al.. (2009). Correction. Gut. 58(7). 1032.2–1032. 1 indexed citations
20.
Isayama, Hiroyuki. (2004). Covered metallic stents for the management of distal malignant biliary obstruction. Digestive Endoscopy. 16. 4 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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