Wasaburo Koizumi

11.1k total citations · 2 hit papers
340 papers, 8.5k citations indexed

About

Wasaburo Koizumi is a scholar working on Pulmonary and Respiratory Medicine, Surgery and Oncology. According to data from OpenAlex, Wasaburo Koizumi has authored 340 papers receiving a total of 8.5k indexed citations (citations by other indexed papers that have themselves been cited), including 215 papers in Pulmonary and Respiratory Medicine, 186 papers in Surgery and 136 papers in Oncology. Recurrent topics in Wasaburo Koizumi's work include Gastric Cancer Management and Outcomes (153 papers), Colorectal Cancer Treatments and Studies (72 papers) and Helicobacter pylori-related gastroenterology studies (44 papers). Wasaburo Koizumi is often cited by papers focused on Gastric Cancer Management and Outcomes (153 papers), Colorectal Cancer Treatments and Studies (72 papers) and Helicobacter pylori-related gastroenterology studies (44 papers). Wasaburo Koizumi collaborates with scholars based in Japan, United States and China. Wasaburo Koizumi's co-authors include Satoshi Tanabe, Katsunori Saigenji, Narikazu Boku, Chikatoshi Katada, Minoru Kurihara, Atsushi Ohtsu, Takuo Hara, Toshikazu Akiya, Katsuhiko Higuchi and Masahiro Takeuchi and has published in prestigious journals such as Journal of Clinical Oncology, SHILAP Revista de lepidopterología and Gastroenterology.

In The Last Decade

Wasaburo Koizumi

333 papers receiving 8.3k citations

Hit Papers

S-1 plus cisplatin versus S-1 alone for first-line treatm... 2008 2026 2014 2020 2008 2009 400 800 1.2k
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. S-1 plus cisplatin versus S-1 alone for first-line treatment of advanced gastric cancer (SPIRITS trial): a phase III trial
    2008 1.5k citations Wasaburo Koizumi, Takuo Hara et al. profile →
  2. Fluorouracil versus combination of irinotecan plus cisplatin versus S-1 in metastatic gastric cancer: a randomised phase 3 study
    2009 472 citations Narikazu Boku, Toshihiko Doi et al. profile →

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Wasaburo Koizumi Japan 43 5.6k 3.6k 3.4k 2.2k 873 340 8.5k
Il Ju Choi South Korea 51 6.0k 1.1× 1.8k 0.5× 4.8k 1.4× 2.8k 1.3× 1.5k 1.7× 285 9.7k
Kazuhiro Yoshida Japan 44 4.1k 0.7× 2.9k 0.8× 2.7k 0.8× 1.5k 0.7× 2.5k 2.9× 478 8.9k
Gary Middleton United Kingdom 41 4.2k 0.8× 5.4k 1.5× 2.0k 0.6× 976 0.4× 1.3k 1.5× 176 8.9k
Kenneth K. Wang United States 53 6.1k 1.1× 1.6k 0.4× 8.2k 2.4× 2.1k 1.0× 1.1k 1.2× 339 10.8k
Hidetaka Mochizuki Japan 55 2.6k 0.5× 4.5k 1.3× 3.2k 0.9× 443 0.2× 1.2k 1.4× 231 9.0k
Benjamin Tan United States 33 1.9k 0.3× 2.9k 0.8× 1.6k 0.5× 886 0.4× 829 0.9× 163 5.0k
Annemieke Cats Netherlands 45 2.8k 0.5× 4.2k 1.2× 2.2k 0.7× 797 0.4× 1.4k 1.6× 218 7.8k
Nirag Jhala United States 41 1.5k 0.3× 3.2k 0.9× 2.4k 0.7× 518 0.2× 1.0k 1.2× 165 6.0k
Thomas Aparicio France 40 2.1k 0.4× 3.6k 1.0× 1.8k 0.5× 1.1k 0.5× 716 0.8× 254 6.5k
Kazuo Shirouzu Japan 49 2.9k 0.5× 4.2k 1.2× 3.8k 1.1× 341 0.2× 2.0k 2.3× 484 8.8k

Countries citing papers authored by Wasaburo Koizumi

Since Specialization
Citations

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

Fields of papers citing papers by Wasaburo Koizumi

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Wasaburo Koizumi

This figure shows the co-authorship network connecting the top 25 collaborators of Wasaburo Koizumi. A scholar is included among the top collaborators of Wasaburo Koizumi 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 Wasaburo Koizumi. Wasaburo Koizumi 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.
Tanabe, Satoshi, Mizutomo Azuma, Takuya Wada, et al.. (2021). Predictive Significance of Promoter DNA Methylation of Cysteine Dioxygenase Type 1 (CDO1) in Metachronous Gastric Cancer. Journal of the Korean Gastric Cancer Association. 21(4). 379–379. 5 indexed citations
2.
Shao, Xue, Haruki Uojima, Taeang Arai, et al.. (2021). The Risk of Cirrhosis and Its Complications Based on PNPLA3 rs738409 G Allele Frequency. Digestive Diseases. 40(5). 625–634. 8 indexed citations
3.
Sakurai, Yasutaka, Masaaki Ichinoe, Takuya Kato, et al.. (2021). CD109 expression in tumor cells and stroma correlates with progression and prognosis in pancreatic cancer. Archiv für Pathologische Anatomie und Physiologie und für Klinische Medicin. 480(4). 819–829. 1 indexed citations
4.
Okuwaki, Kosuke, Hiroshi Imaizumi, Mitsuhiro Kida, et al.. (2021). New image‐processing technology for endoscopic ultrasound‐guided fine‐needle aspiration biopsy specimen evaluation in patients with pancreatic cancer. SHILAP Revista de lepidopterología. 2(1). e21–e21. 4 indexed citations
5.
Watanabe, Masafumi, Kosuke Okuwaki, Mitsuhiro Kida, et al.. (2021). Histopathological comparison of aspiration and biopsy needles in endoscopic ultrasound‐guided tissue acquisition in patients with subepithelial lesions. Diagnostic Cytopathology. 49(7). 856–863. 3 indexed citations
6.
Uojima, Haruki, Makoto Chuma, Xue Shao, et al.. (2020). Influence of NOS3 rs2070744 genotypes on hepatocellular carcinoma patients treated with lenvatinib. Scientific Reports. 10(1). 17054–17054. 5 indexed citations
7.
Wada, Naohisa, Haruki Uojima, Takashi Satoh, et al.. (2020). Impact of Anti-GPIIb/IIIa Antibody-Producing B Cells as a Predictor of the Response to Lusutrombopag in Thrombocytopenic Patients with Liver Disease. Digestive Diseases. 39(3). 234–242. 7 indexed citations
8.
Watanabe, Masafumi, Kosuke Okuwaki, Mitsuhiro Kida, et al.. (2020). Cholecystitis after Placement of Covered Self-Expandable Metallic Stents in Patients with Distal Malignant Biliary Obstructions. Clinical Endoscopy. 54(4). 589–595. 11 indexed citations
9.
Watanabe, Masaaki, et al.. (2019). Assessing the characteristics and feasibility of preventing early mortality in patients with hepatocellular carcinoma. The Turkish Journal of Gastroenterology. 30(6). 541–548. 2 indexed citations
10.
Yamada, Yasuhide, Wasaburo Koizumi, Kazuhiro Nishikawa, et al.. (2019). Sex differences in the safety of S‐1 plus oxaliplatin and S‐1 plus cisplatin for patients with metastatic gastric cancer. Cancer Science. 110(9). 2875–2883. 12 indexed citations
11.
Katada, Chikatoshi, Satoshi Tanabe, Takuya Wada, et al.. (2018). Retrospective Assessment of the Diagnostic Accuracy of the Depth of Invasion by Narrow Band Imaging Magnifying Endoscopy in Patients with Superficial Esophageal Squamous Cell Carcinoma. Journal of Gastrointestinal Cancer. 50(2). 292–297. 24 indexed citations
12.
Ishido, Kenji, Katsuhiko Higuchi, Satoshi Tanabe, et al.. (2015). Chemoradiotherapy for patients with recurrent lymph-node metastasis or local recurrence of gastric cancer after curative gastrectomy. Japanese Journal of Radiology. 34(1). 35–42. 2 indexed citations
13.
Wakatsuki, Takeru, Melissa J. LaBonte, Pierre Bohanes, et al.. (2013). Prognostic Role of Lemur Tyrosine Kinase-3 Germline Polymorphisms in Adjuvant Gastric Cancer in Japan and the United States. Molecular Cancer Therapeutics. 12(10). 2261–2272. 18 indexed citations
14.
Sato, Takehito, Hideki Amano, Yoshiya Ito, et al.. (2013). Aspirin delays the healing of acetic acid-induced gastric ulcer with attenuated recruitment of hematopoietic progenitor cells to ulcer granulation tissue in mice. 43(1). 57–66. 1 indexed citations
15.
Yamaguchi, Kensei, Akira Sawaki, Toshihiko Doi, et al.. (2012). Efficacy and safety of capecitabine plus cisplatin in Japanese patients with advanced or metastatic gastric cancer: subset analyses of the AVAGAST study and the ToGA study. Gastric Cancer. 16(2). 175–182. 20 indexed citations
16.
Yanagisawa, Nobuyuki, Masaaki Ichinoe, Tetuo Mikami, et al.. (2012). High expression of L-type amino acid transporter 1 (LAT1) predicts poor prognosis in pancreatic ductal adenocarcinomas. Journal of Clinical Pathology. 65(11). 1019–1023. 64 indexed citations
17.
Narahara, H., Wasaburo Koizumi, Takuo Hara, et al.. (2007). Randomized phase III study of S-1 alone versus S-1 + cisplatin in the treatment for advanced gastric cancer (The SPIRITS trial) SPIRITS: S-1 plus cisplatin vs S-1 in RCT in the treatment for stomach cancer. Journal of Clinical Oncology. 25(18_suppl). 4514–4514. 42 indexed citations
18.
Rojo, Federico, Josep Tabernero, Eric Van Cutsem, et al.. (2003). Pharmacodynamic studies of tumor biopsy specimens from patients with advanced gastric carcinoma undergoing treatment with genfinitib (ZD1839). Journal of Clinical Oncology. 21(23). 191–191. 21 indexed citations
19.
20.
Koizumi, Wasaburo, et al.. (1986). ENDOSCOPIC DIAGNOSIS OF THE EXTENT OF MUCOSAL INFILTRATION OF DEPRESSED EARLY GASTRIC CANCER BY PHARMACOENDOSCOPY. Acta gastro-enterologica belgica. 28(3). 493–507. 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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