Kenjiro Okada

429 total citations
50 papers, 245 citations indexed

About

Kenjiro Okada is a scholar working on Oncology, Surgery and Pulmonary and Respiratory Medicine. According to data from OpenAlex, Kenjiro Okada has authored 50 papers receiving a total of 245 indexed citations (citations by other indexed papers that have themselves been cited), including 44 papers in Oncology, 26 papers in Surgery and 20 papers in Pulmonary and Respiratory Medicine. Recurrent topics in Kenjiro Okada's work include Pancreatic and Hepatic Oncology Research (41 papers), Neuroendocrine Tumor Research Advances (20 papers) and Cholangiocarcinoma and Gallbladder Cancer Studies (12 papers). Kenjiro Okada is often cited by papers focused on Pancreatic and Hepatic Oncology Research (41 papers), Neuroendocrine Tumor Research Advances (20 papers) and Cholangiocarcinoma and Gallbladder Cancer Studies (12 papers). Kenjiro Okada collaborates with scholars based in Japan. Kenjiro Okada's co-authors include Kenichiro Uemura, Yoshiaki Murakami, Naru Kondo, Shin’ya Takahashi, Naoya Nakagawa, Hiroyuki Otsuka, Tatsuaki Sumiyoshi, Yasushi Hashimoto, Takeshi Sudo and Taijiro Sueda and has published in prestigious journals such as SHILAP Revista de lepidopterología, Gastroenterology and European Journal of Cancer.

In The Last Decade

Kenjiro Okada

47 papers receiving 240 citations

Peers

Kenjiro Okada
Chie Takishita Japan
Yatsuka Sahara Japan
Shimpei Otsuka Japan
Tatsunori Satoh Japan
Lenika Calavrezos Germany
Qinglong Jiang China
Jacob L. van Dam Netherlands
Svein Olav Bratlie Sweden
Emad Abu-Hamda United States
Lindsey Manos United States
Chie Takishita Japan
Kenjiro Okada
Citations per year, relative to Kenjiro Okada Kenjiro Okada (= 1×) peers Chie Takishita

Countries citing papers authored by Kenjiro Okada

Since Specialization
Citations

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

Fields of papers citing papers by Kenjiro Okada

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Kenjiro Okada

This figure shows the co-authorship network connecting the top 25 collaborators of Kenjiro Okada. A scholar is included among the top collaborators of Kenjiro Okada 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 Kenjiro Okada. Kenjiro Okada 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.
Sumiyoshi, Tatsuaki, Kenjiro Okada, Shinya Nakamura, et al.. (2025). Standardization of surgical procedure for initially unresectable locally advanced pancreatic head cancer. Langenbeck s Archives of Surgery. 410(1). 226–226. 1 indexed citations
2.
Sumiyoshi, Tatsuaki, Kenichiro Uemura, Kenjiro Okada, et al.. (2024). Clinical Utility of the Combined Use of CA19-9 and DUPAN-2 in Pancreatic Adenocarcinoma. Annals of Surgical Oncology. 31(7). 4665–4672. 7 indexed citations
3.
Okada, Kenjiro, Tsuyoshi Kobayashi, Shintaro Kuroda, et al.. (2023). Prognostic impact of pre- and postoperative tumor markers in patients with intrahepatic cholangiocarcinoma. Surgery Today. 54(2). 177–185. 1 indexed citations
4.
Uemura, Kenichiro, Naru Kondo, Takeshi Sudo, et al.. (2023). Long‐term outcomes of neoadjuvant gemcitabine, nab‐paclitaxel, and S1 (GAS) in borderline resectable pancreatic cancer with arterial contact: Results from a phase II trial. Journal of Hepato-Biliary-Pancreatic Sciences. 31(5). 351–362. 3 indexed citations
5.
Uemura, Kenichiro, Tatsuaki Sumiyoshi, Kenjiro Okada, et al.. (2023). Optimal Lymphadenectomy in Patients with Well-Differentiated Nonfunctioning Pancreatic Neuroendocrine Neoplasms. Journal of Clinical Medicine. 12(21). 6778–6778. 1 indexed citations
6.
Sumiyoshi, Tatsuaki, Kenichiro Uemura, Taiichi Takasaki, et al.. (2023). Hepatic artery resection in distal cholangiocarcinoma. Langenbeck s Archives of Surgery. 408(1). 58–58. 1 indexed citations
7.
Sumiyoshi, Tatsuaki, Kenichiro Uemura, Kenjiro Okada, et al.. (2023). Prognostic impact of lung recurrence in patients with biliary tract cancer. Langenbeck s Archives of Surgery. 408(1). 290–290.
8.
Sumiyoshi, Tatsuaki, Kenichiro Uemura, Kenjiro Okada, et al.. (2022). A case of unresectable locally advanced intrahepatic cholangiocarcinoma that achieved pathological complete response after gemcitabine and S1 chemotherapy. Clinical Journal of Gastroenterology. 15(6). 1164–1168. 1 indexed citations
9.
Otsuka, Hiroyuki, Kenichiro Uemura, Naru Kondo, et al.. (2022). Preoperative risk factors for positivity of peritoneal lavage cytology in patients with pancreatic ductal adenocarcinoma in the era of neoadjuvant therapy. Pancreatology. 22(5). 583–589. 3 indexed citations
10.
Uemura, Kenichiro, Tatsuaki Sumiyoshi, Naru Kondo, et al.. (2022). Optimal lymph-node dissection for pancreatic tail cancer. Surgery Today. 52(9). 1307–1312. 6 indexed citations
11.
Kondo, Naru, Kenichiro Uemura, Tatsuaki Sumiyoshi, et al.. (2021). Identification of Preoperative Risk Factors for Poor Survival in Patients with Resectable Pancreatic Cancer Treated with Upfront Surgery. Digestive Surgery. 38(5-6). 352–360. 4 indexed citations
12.
Ishikawa, Sho, Shintaro Kuroda, Kenjiro Okada, et al.. (2021). Treatment of multiple huge liver cysts in a hybrid operating room: a case report. SHILAP Revista de lepidopterología. 7(1). 232–232. 2 indexed citations
13.
Okada, Kenjiro, Kenichiro Uemura, Naru Kondo, et al.. (2021). Neoadjuvant therapy contributes to nodal downstaging of pancreatic cancer. Langenbeck s Archives of Surgery. 407(2). 623–632. 4 indexed citations
14.
Okada, Kenjiro, Kenichiro Uemura, Naru Kondo, et al.. (2021). Preoperative risk factors for para-aortic lymph node positivity in pancreatic cancer. Pancreatology. 21(3). 606–612. 7 indexed citations
15.
Uemura, Kenichiro, Naru Kondo, Tatsuaki Sumiyoshi, et al.. (2021). Prognostic Value of Peritoneal Lavage Cytology in Patients with Pancreatic Ductal Adenocarcinoma Stratified by the Resectability Status. Journal of Gastrointestinal Surgery. 25(11). 2871–2880. 6 indexed citations
16.
Okada, Kenjiro, Kenichiro Uemura, Naru Kondo, et al.. (2020). Prognostic significance of dissecting the nerve plexus around the common hepatic artery in pancreatic cancer. Langenbeck s Archives of Surgery. 406(3). 679–689. 3 indexed citations
17.
Yokoyama, Yujiro, et al.. (2014). Intramesenteric Hernia of the Small Intestine. The Japanese Journal of Gastroenterological Surgery. 47(12). 790–795.
18.
Okada, Kenjiro, et al.. (2014). A Case of Adenosquamous Cell Carcinoma of the Gallbladder with So-called Carcinosarcoma. Nihon Rinsho Geka Gakkai Zasshi (Journal of Japan Surgical Association). 75(4). 1043–1049. 2 indexed citations
19.
Okada, Kenjiro, Yoshiaki Murakami, Kenichiro Uemura, et al.. (2014). Non-functioning pancreatic neuroendocrine tumor with large cystic lesion: A case report. Suizo. 29(1). 91–97. 2 indexed citations
20.
Kobayashi, Hironori, et al.. (2014). Intestinal Obstruction Due to Vitelline Vascular Remnants Treated by Single-incision Laparoscopic-assisted Surgery. The Japanese Journal of Gastroenterological Surgery. 47(11). 719–725. 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 Chie Takishita Breakdown of academic impact, for papers by Yatsuka Sahara Breakdown of academic impact, for papers by Shimpei Otsuka Breakdown of academic impact, for papers by Tatsunori Satoh Breakdown of academic impact, for papers by Lenika Calavrezos Breakdown of academic impact, for papers by Qinglong Jiang Breakdown of academic impact, for papers by Jacob L. van Dam Breakdown of academic impact, for papers by Svein Olav Bratlie Breakdown of academic impact, for papers by Emad Abu-Hamda Breakdown of academic impact, for papers by Lindsey Manos
Rankless by CCL
2026