Ko Tomishima

508 total citations
36 papers, 164 citations indexed

About

Ko Tomishima is a scholar working on Surgery, Pulmonary and Respiratory Medicine and Oncology. According to data from OpenAlex, Ko Tomishima has authored 36 papers receiving a total of 164 indexed citations (citations by other indexed papers that have themselves been cited), including 30 papers in Surgery, 21 papers in Pulmonary and Respiratory Medicine and 21 papers in Oncology. Recurrent topics in Ko Tomishima's work include Gallbladder and Bile Duct Disorders (21 papers), Pancreatic and Hepatic Oncology Research (20 papers) and Pediatric Hepatobiliary Diseases and Treatments (16 papers). Ko Tomishima is often cited by papers focused on Gallbladder and Bile Duct Disorders (21 papers), Pancreatic and Hepatic Oncology Research (20 papers) and Pediatric Hepatobiliary Diseases and Treatments (16 papers). Ko Tomishima collaborates with scholars based in Japan, United States and South Korea. Ko Tomishima's co-authors include Shigeto Ishii, Toshio Fujisawa, Hiroyuki Isayama, Yusuke Takasaki, Akinori Suzuki, Sho Takahashi, Hiroaki Saito, Shuichiro Shiina, Koichi Ito and Tadakazu Hisamatsu and has published in prestigious journals such as Journal of Clinical Oncology, Gastroenterology and International Journal of Molecular Sciences.

In The Last Decade

Ko Tomishima

30 papers receiving 154 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Ko Tomishima Japan 8 143 125 89 12 12 36 164
A. Floortje van Oosten Netherlands 7 109 0.8× 102 0.8× 176 2.0× 29 2.4× 7 0.6× 9 191
Salvatore Barbaro Italy 6 108 0.8× 80 0.6× 134 1.5× 11 0.9× 21 1.8× 9 163
Tomoaki Matsumori Japan 8 157 1.1× 127 1.0× 129 1.4× 22 1.8× 8 0.7× 37 202
Carlo Lombardo Italy 8 102 0.7× 67 0.5× 83 0.9× 12 1.0× 14 1.2× 23 162
Yuta Maruki Japan 8 109 0.8× 97 0.8× 78 0.9× 8 0.7× 10 0.8× 47 160
Wenxiang Wang China 8 73 0.5× 186 1.5× 139 1.6× 8 0.7× 5 0.4× 25 232
Tarek Boussaha France 5 114 0.8× 74 0.6× 85 1.0× 8 0.7× 13 1.1× 9 140
Hiroki Sunagawa Japan 7 134 0.9× 52 0.4× 57 0.6× 29 2.4× 32 2.7× 32 168
Carola Haapamäki Finland 7 183 1.3× 149 1.2× 112 1.3× 8 0.7× 5 0.4× 9 214
Ryota Nakano Japan 8 65 0.5× 50 0.4× 58 0.7× 29 2.4× 16 1.3× 33 118

Countries citing papers authored by Ko Tomishima

Since Specialization
Citations

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

Fields of papers citing papers by Ko Tomishima

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Ko Tomishima

This figure shows the co-authorship network connecting the top 25 collaborators of Ko Tomishima. A scholar is included among the top collaborators of Ko Tomishima 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 Ko Tomishima. Ko Tomishima 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.
Takasaki, Yusuke, Hiroyuki Isayama, Yusuke Yamaguchi, et al.. (2025). Peroral cholangioscopy-guided laser stricturoplasty for intrahepatic benign biliary strictures (with video). Gastrointestinal Endoscopy. 103(4). 799–803.
2.
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.
Ito, Koichi, Yusuke Takasaki, Toshio Fujisawa, et al.. (2023). Current Situation and Problems in Diagnosis of Early Chronic Pancreatitis. Pancreas. 52(5). e275–e281. 1 indexed citations
5.
Takahashi, Sho, Toshio Fujisawa, Ko Tomishima, Shigeto Ishii, & Hiroyuki Isayama. (2022). A case of endoscopic minor duodenal papillectomy after pancreatic stent placement using an endoscopic ultrasonography-guided rendezvous method. VideoGIE. 7(6). 229–232.
6.
Suzuki, Akinori, Shigeto Ishii, Toshio Fujisawa, et al.. (2022). Efficacy and Safety of Peroral Pancreatoscopy Through the Fistula Created by Endoscopic Ultrasound–Guided Pancreaticogastrostomy. Pancreas. 51(3). 228–233. 8 indexed citations
7.
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
8.
Fujisawa, Toshio, Shigeto Ishii, Ko Tomishima, et al.. (2021). Usefulness of Routine Plain CT the Day After an Interventional EUS Procedure. Saudi Journal of Gastroenterology. 27(5). 275–282. 5 indexed citations
9.
Fujisawa, Toshio, Hiroyuki Isayama, Tomoyoshi Shibuya, Ko Tomishima, & Shigeto Ishii. (2021). Cholangioscopy and double-balloon enteroscopy mediated “sandwich puncture” of a completely closed choledochojejunostomy. VideoGIE. 6(7). 325–328. 2 indexed citations
10.
Tomishima, Ko, Shigeto Ishii, Toshio Fujisawa, et al.. (2021). Evaluation of the Feasibility and Effectiveness of Placement of Fully Covered Self-Expandable Metallic Stents via Various Insertion Routes for Benign Biliary Strictures. Journal of Clinical Medicine. 10(11). 2397–2397. 5 indexed citations
11.
Tomishima, Ko, Shigeto Ishii, Toshio Fujisawa, et al.. (2021). Does restricting fluid volume impact post-ERCP pancreatitis in patient with heart disease?. Saudi Journal of Gastroenterology. 27(6). 355–360. 2 indexed citations
12.
13.
Isayama, Hiroyuki, Shigeto Ishii, Toshio Fujisawa, et al.. (2020). Evaluation of the safety and efficacy of minimal endoscopic sphincterotomy followed by papillary balloon dilation for the removal of common bile duct stones. Saudi Journal of Gastroenterology. 26(6). 344–344. 13 indexed citations
14.
15.
Ishii, Shigeto, Hiroyuki Isayama, Sho Takahashi, et al.. (2020). Best Procedure for the Management of Common Bile Duct Stones via the Papilla: Literature Review and Analysis of Procedural Efficacy and Safety. Journal of Clinical Medicine. 9(12). 3808–3808. 15 indexed citations
16.
Tomishima, Ko, Toshio Fujisawa, Yuki Fukumura, et al.. (2020). Mucinous Cystadenocarcinoma of the Pancreas with Cyst Infection in a Male Patient. Internal Medicine. 59(19). 2383–2389. 1 indexed citations
17.
Shimada, Yuji, Kohei Matsumoto, Yuji Ikeda, et al.. (2019). Su1103 – Does Ppi Play a Protective Role in Gastric Mucosa in Patients Taking Doacs? and Also in Patients Taking Vka?. Gastroenterology. 156(6). S–503. 1 indexed citations
18.
Tomishima, Ko, Shunsuke Sato, Yoshio Kanemitsu, et al.. (2018). A case of ischemic gastroduodenal disease in a patient who was receiving hemodialysis treatment that was managed by conservative treatment. Clinical Journal of Gastroenterology. 11(5). 386–390. 2 indexed citations
19.
Ito, Tomoyasu, Jin Kan Sai, Hironao Okubo, et al.. (2016). Safety of immediate endoscopic sphincterotomy in acute suppurative cholangitis caused by choledocholithiasis. World Journal of Gastrointestinal Endoscopy. 8(3). 180–180. 8 indexed citations
20.
Sai, Jin Kan, Tomoyasu Ito, Hiroko Miura, et al.. (2016). Prior minimal endoscopic sphincterotomy to prevent pancreatitis related to endoscopic balloon sphincteroplasty. World Journal of Gastrointestinal Endoscopy. 8(18). 663–663. 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.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by A. Floortje van Oosten Breakdown of academic impact, for papers by Salvatore Barbaro Breakdown of academic impact, for papers by Tomoaki Matsumori Breakdown of academic impact, for papers by Carlo Lombardo Breakdown of academic impact, for papers by Yuta Maruki Breakdown of academic impact, for papers by Wenxiang Wang Breakdown of academic impact, for papers by Tarek Boussaha Breakdown of academic impact, for papers by Hiroki Sunagawa Breakdown of academic impact, for papers by Carola Haapamäki Breakdown of academic impact, for papers by Ryota Nakano
Rankless by CCL
2026