Kojun Okamoto

662 total citations
50 papers, 370 citations indexed

About

Kojun Okamoto is a scholar working on Surgery, Pulmonary and Respiratory Medicine and Oncology. According to data from OpenAlex, Kojun Okamoto has authored 50 papers receiving a total of 370 indexed citations (citations by other indexed papers that have themselves been cited), including 40 papers in Surgery, 23 papers in Pulmonary and Respiratory Medicine and 21 papers in Oncology. Recurrent topics in Kojun Okamoto's work include Pancreatic and Hepatic Oncology Research (14 papers), Pancreatitis Pathology and Treatment (8 papers) and Gallbladder and Bile Duct Disorders (8 papers). Kojun Okamoto is often cited by papers focused on Pancreatic and Hepatic Oncology Research (14 papers), Pancreatitis Pathology and Treatment (8 papers) and Gallbladder and Bile Duct Disorders (8 papers). Kojun Okamoto collaborates with scholars based in Japan. Kojun Okamoto's co-authors include Isamu Koyama, Katsuya Okada, Masayasu Aikawa, Mitsuo Miyazawa, Yasuko Toshimitsu, Shigeki Yamaguchi, Hiroshi Sato, Yoshito Ikada, Etsuko Imabayashi and Hiroshi Matsuda and has published in prestigious journals such as SHILAP Revista de lepidopterología, Gastrointestinal Endoscopy and The American Journal of Surgery.

In The Last Decade

Kojun Okamoto

43 papers receiving 357 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Kojun Okamoto Japan 11 272 156 154 73 63 50 370
Adrian Bartoş Romania 10 136 0.5× 69 0.4× 88 0.6× 54 0.7× 44 0.7× 53 292
Yasuhiro Hata Japan 11 167 0.6× 162 1.0× 99 0.6× 68 0.9× 97 1.5× 19 305
M Ionescu Romania 13 323 1.2× 201 1.3× 270 1.8× 113 1.5× 57 0.9× 73 478
Hugo Teixeira Farinha Switzerland 11 472 1.7× 122 0.8× 65 0.4× 27 0.4× 107 1.7× 32 524
Alfredo Garofalo Italy 13 610 2.2× 221 1.4× 87 0.6× 72 1.0× 32 0.5× 27 737
M Kokubun Japan 7 320 1.2× 109 0.7× 45 0.3× 63 0.9× 47 0.7× 21 398
Yoshitsugu Yoshida Japan 10 226 0.8× 113 0.7× 88 0.6× 49 0.7× 21 0.3× 25 297
T.M. van Gulik Netherlands 12 559 2.1× 416 2.7× 389 2.5× 122 1.7× 144 2.3× 30 733
Fikri Bouazza Belgium 11 167 0.6× 88 0.6× 143 0.9× 28 0.4× 94 1.5× 24 298
Chiyo Maeda Japan 9 190 0.7× 150 1.0× 160 1.0× 18 0.2× 43 0.7× 27 336

Countries citing papers authored by Kojun Okamoto

Since Specialization
Citations

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

Fields of papers citing papers by Kojun Okamoto

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Kojun Okamoto

This figure shows the co-authorship network connecting the top 25 collaborators of Kojun Okamoto. A scholar is included among the top collaborators of Kojun Okamoto 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 Kojun Okamoto. Kojun Okamoto 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.
2.
Okada, Katsuya, et al.. (2024). Long-term outcomes and risk factors of pancreatic insufficiency after a pancreatoduodenectomy: A retrospective study. Surgery. 176(3). 880–889. 2 indexed citations
3.
Ohtsuka, Takao, Masafumi Nakamura, Susumu Hijioka, et al.. (2023). Feasibility of Surveillance for Mucinous Cystic Neoplasm of the Pancreas. Pancreas. 52(5). e288–e292. 2 indexed citations
4.
Okada, Katsuya, et al.. (2022). Outcomes of Arterial Embolization vs Covered Stents for Delayed Massive Hemorrhage After Pancreatic or Biliary Surgery. Journal of Gastrointestinal Surgery. 26(6). 1187–1197. 4 indexed citations
5.
Aikawa, Masayasu, et al.. (2022). Influence of Child–Pugh B7 and B8/9 cirrhosis on laparoscopic liver resection for hepatocellular carcinoma: a retrospective cohort study. Surgical Endoscopy. 37(2). 1316–1333. 14 indexed citations
6.
Aikawa, Masayasu, Katsuya Okada, Kojun Okamoto, et al.. (2022). Lymphoid hyperplasia with a polyp form of the gallbladder macroscopically mimicking carcinoma. Clinical Journal of Gastroenterology. 15(2). 500–504. 1 indexed citations
7.
Sugita, Hirofumi, Shinichi Sakuramoto, Naoto Fujiwara, et al.. (2021). Linear stapler anastomosis for esophagogastrostomy in laparoscopic proximal gastrectomy reduce reflux esophagitis. Langenbeck s Archives of Surgery. 406(8). 2709–2716. 3 indexed citations
8.
Hirano, Yasumitsu, Satoshi Shimamura, Shintaro Ishikawa, et al.. (2021). The first single-incision plus one-port transverse colon resection using Senhance Digital Laparoscopy System: a case report. SHILAP Revista de lepidopterología. 7(1). 89–89. 2 indexed citations
9.
Miyawaki, Yutaka, Hiroshi Sato, Naoto Fujiwara, et al.. (2020). Verification of oncological local control for hand-assisted laparoscopic abdominal lymph node dissection in esophageal cancer surgery: a propensity score-matched analysis. Esophagus. 18(2). 187–194. 3 indexed citations
10.
Miyawaki, Yutaka, Hiroshi Sato, Naoto Fujiwara, et al.. (2019). Evaluation of the Associations between Gastric Tube Preparation Methods and the Incidence of Cervical Anastomotic Leakage after Esophagectomy for Thoracic Esophageal Cancer. Digestive Surgery. 37(2). 154–162. 10 indexed citations
11.
Sakuramoto, Shinichi, Yutaka Miyawaki, Hisashi Gunji, et al.. (2018). Laparoscopy-assisted Distal Gastrectomy for Gastric Cancer in Elderly Patients: Surgical Outcomes and Prognosis. Anticancer Research. 38(3). 1721–1725. 8 indexed citations
12.
Okamoto, Kojun, et al.. (2017). A case of aggressive solid pseudopapillary neoplasm: Comparison of clinical and pathologic features with non‐aggressive cases. Pathology International. 67(4). 202–207. 20 indexed citations
13.
14.
Miyazawa, Mitsuo, Masayasu Aikawa, Kojun Okamoto, et al.. (2015). Extensive regeneration of the stomach using bioabsorbable polymer sheets. Surgery. 158(5). 1283–1290. 4 indexed citations
15.
Miyazawa, Mitsuo, Kojun Okamoto, Yasuko Toshimitsu, et al.. (2013). Thoracoscopic hepatectomy for malignant liver tumor. Surgical Endoscopy. 28(1). 314–314. 18 indexed citations
16.
Aikawa, Masayasu, Mitsuo Miyazawa, Kojun Okamoto, et al.. (2012). A bioabsorbable polymer patch for the treatment of esophageal defect in a porcine model. Journal of Gastroenterology. 48(7). 822–829. 16 indexed citations
17.
Aikawa, Masayasu, Mitsuo Miyazawa, Katsuya Okada, et al.. (2011). A case of giant hemangioma of the liver with abdominal wall abscess. Kanzo. 52(7). 485–490.
18.
Aikawa, Masayasu, Mitsuo Miyazawa, Kojun Okamoto, et al.. (2011). Single-port laparoscopic hepatectomy: technique, safety, and feasibility in a clinical case series. Surgical Endoscopy. 26(6). 1696–1701. 40 indexed citations
19.
Miyazawa, Mitsuo, Masayasu Aikawa, Katsuya Okada, et al.. (2011). Regeneration of extrahepatic bile ducts by tissue engineering with a bioabsorbable polymer. Journal of Artificial Organs. 15(1). 26–31. 12 indexed citations
20.
Aikawa, Masayasu, Mitsuo Miyazawa, Katsuya Okada, et al.. (2009). . The Japanese Journal of Gastroenterological Surgery. 42(1). 139–139. 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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2026