Takuma Okamura

733 total citations
51 papers, 437 citations indexed

About

Takuma Okamura is a scholar working on Surgery, Pulmonary and Respiratory Medicine and Gastroenterology. According to data from OpenAlex, Takuma Okamura has authored 51 papers receiving a total of 437 indexed citations (citations by other indexed papers that have themselves been cited), including 31 papers in Surgery, 20 papers in Pulmonary and Respiratory Medicine and 18 papers in Gastroenterology. Recurrent topics in Takuma Okamura's work include Gastric Cancer Management and Outcomes (18 papers), Gastrointestinal Tumor Research and Treatment (12 papers) and Helicobacter pylori-related gastroenterology studies (11 papers). Takuma Okamura is often cited by papers focused on Gastric Cancer Management and Outcomes (18 papers), Gastrointestinal Tumor Research and Treatment (12 papers) and Helicobacter pylori-related gastroenterology studies (11 papers). Takuma Okamura collaborates with scholars based in Japan and United States. Takuma Okamura's co-authors include Yugo Iwaya, Tomoaki Suga, Eiji Tanaka, Kazuo Orii, Yoji Iwasaki, Tadanobu Nagaya, Yasuhiro Takase, Norikazu Arakura, Hitoshi Kameyama and Toshifumi Wakai and has published in prestigious journals such as Journal of Clinical Oncology, SHILAP Revista de lepidopterología and Thorax.

In The Last Decade

Takuma Okamura

45 papers receiving 418 citations

Peers

Takuma Okamura
Toshiro Kamoshida Japan
Massimo Graffeo Italy
Anuradha Sekaran India
Kimitoshi Kubo Japan
Panos Sechopoulos Greece
Paschalis Chatzipantelis Greece
Takeshi Tomiyama Japan
A. Paterlini Italy
C Briggs United Kingdom
S. Riva Spain
Toshiro Kamoshida Japan
Takuma Okamura
Citations per year, relative to Takuma Okamura Takuma Okamura (= 1×) peers Toshiro Kamoshida

Countries citing papers authored by Takuma Okamura

Since Specialization
Citations

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

Fields of papers citing papers by Takuma Okamura

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Takuma Okamura

This figure shows the co-authorship network connecting the top 25 collaborators of Takuma Okamura. A scholar is included among the top collaborators of Takuma Okamura 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 Takuma Okamura. Takuma Okamura 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.
Okamura, Takuma, Akihiro Ito, Yugo Iwaya, et al.. (2025). Long-term evaluation of Helicobacter pylori screening in school health checkups: an 11-year study in Japan. Journal of Gastroenterology. 60(6). 696–704. 1 indexed citations
2.
Ichikawa, Tatsuki, Satoshi Miuma, Yusuke Nakano, et al.. (2025). Grip strength is a strong indicator of osteoporosis in both women and men with chronic liver disease. Hepatology Research. 55(6). 830–843. 1 indexed citations
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Ichikawa, Tatsuki, Yusuke Nakano, Hiroyuki Yajima, et al.. (2024). Serum immunoglobulin A levels: Diagnostic utility in alcoholic liver disease and association with liver fibrosis in steatotic liver disease. Biomedical Reports. 21(4). 142–142.
7.
Arai, Junya, Ryota Niikura, Yoku Hayakawa, et al.. (2023). Association of probiotic use with nivolumab effectiveness against various cancers: A multicenter retrospective cohort study. Cancer Medicine. 12(16). 16876–16880. 4 indexed citations
8.
Iwaya, Yugo, Kenichi Goda, Takayuki Miyazawa, et al.. (2023). Association between endoscopic evidence of bile reflux and Barrett's esophagus: A large-scale case-control study. Digestive and Liver Disease. 56(4). 622–627. 2 indexed citations
9.
Okamura, Takuma, et al.. (2021). Gastric adenocarcinoma arising from hamartomatous inverted polyp during 8‐year follow‐up. SHILAP Revista de lepidopterología. 2(1). e16–e16. 4 indexed citations
10.
Okamura, Takuma, Taiki Hashimoto, Teruhiko Yoshida, et al.. (2020). Clinicopathologic and Molecular Characteristics of Familial Adenomatous Polyposis–associated Traditional Serrated Adenoma. The American Journal of Surgical Pathology. 44(9). 1282–1289. 3 indexed citations
11.
Okamura, Takuma, et al.. (2018). Accuracy of Endoscopic Diagnosis for Mild Atrophic Gastritis Infected with Helicobacter pylori. Clinical Endoscopy. 51(4). 362–367. 22 indexed citations
12.
Kameyama, Hitoshi, Yoshifumi Shimada, Yosuke Tajima, et al.. (2018). Small Bowel Obstruction After Ileal Pouch-Anal Anastomosis With a Loop Ileostomy in Patients With Ulcerative Colitis. Annals of Coloproctology. 34(2). 94–100. 9 indexed citations
13.
Tamura, Hiroshi, Yoshifumi Shimada, Hitoshi Kameyama, et al.. (2017). Prophylactic lateral pelvic lymph node dissection in stage IV low rectal cancer. World Journal of Clinical Oncology. 8(5). 412–419. 9 indexed citations
14.
Shimada, Yoshifumi, Hitoshi Kameyama, Yosuke Tajima, et al.. (2016). Clinical Significance of Extramural Tumor Deposits in the Lateral Pelvic Lymph Node Area in Low Rectal Cancer: A Retrospective Study at Two Institutions. Annals of Surgical Oncology. 23(S4). 552–558. 28 indexed citations
15.
Akamatsu, Taiji, Takuma Okamura, Yugo Iwaya, & Tomoaki Suga. (2015). Screening to Identify and Eradicate Helicobacter pylori Infection in Teenagers in Japan. Gastroenterology Clinics of North America. 44(3). 667–676. 24 indexed citations
16.
Okamura, Takuma, Yasuhiro Sakai, Hitomi Hoshino, et al.. (2014). Superficially located enlarged lymphoid follicles characterise nodular gastritis. Pathology. 47(1). 38–44. 23 indexed citations
17.
Okamura, Takuma, et al.. (2013). Imatinib therapy for a patient with metastasis of colonic gastrointestinal stromal tumor: report of a case. Clinical Journal of Gastroenterology. 6(2). 116–121. 5 indexed citations
18.
Nakano, Masato, et al.. (2013). A Case of Hepatic Gas Gangrene with Disseminated Intravascular Coagulation and Multiple Organ Failure Successfully Treated with Repeated Necrosectomy. The Japanese Journal of Gastroenterological Surgery. 46(6). 416–423. 2 indexed citations
19.
Okamura, Takuma, Tomoaki Suga, Yugo Iwaya, et al.. (2012). Helicobacter pylori-Negative Primary Rectal MALT Lymphoma: Complete Remission after Radiotherapy. Case Reports in Gastroenterology. 6(2). 319–327. 13 indexed citations
20.
Koyama, Yoshinori, et al.. (2011). A CASE OF METASTASIS TO THE SMALL INTESTINE FROM ESOPHAGEAL SQUAMOUS CELL CARCINOMA PRESENTED WITH SMALL BOWEL OBSTRUCTION. Nihon Rinsho Geka Gakkai Zasshi (Journal of Japan Surgical Association). 72(3). 652–657.

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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