Kazuo Ohtsuka

7.4k total citations
142 papers, 4.4k citations indexed

About

Kazuo Ohtsuka is a scholar working on Surgery, Genetics and Immunology. According to data from OpenAlex, Kazuo Ohtsuka has authored 142 papers receiving a total of 4.4k indexed citations (citations by other indexed papers that have themselves been cited), including 57 papers in Surgery, 47 papers in Genetics and 37 papers in Immunology. Recurrent topics in Kazuo Ohtsuka's work include Inflammatory Bowel Disease (46 papers), Immune Cell Function and Interaction (27 papers) and Gastrointestinal Bleeding Diagnosis and Treatment (26 papers). Kazuo Ohtsuka is often cited by papers focused on Inflammatory Bowel Disease (46 papers), Immune Cell Function and Interaction (27 papers) and Gastrointestinal Bleeding Diagnosis and Treatment (26 papers). Kazuo Ohtsuka collaborates with scholars based in Japan, United States and Norway. Kazuo Ohtsuka's co-authors include David A. Horwitz, J. Dixon Gray, Toru Abo, Satoshi Yamagiwa, Shin‐ei Kudo, Mamoru Watanabe, Toshimitsu Fujii, Song Guo Zheng, K Takenaka and Masakazu Nagahori and has published in prestigious journals such as Nature Communications, The Journal of Experimental Medicine and SHILAP Revista de lepidopterología.

In The Last Decade

Kazuo Ohtsuka

129 papers receiving 4.3k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Kazuo Ohtsuka Japan 35 1.8k 1.3k 1.1k 1.0k 831 142 4.4k
Ellen C. Ebert United States 32 2.6k 1.4× 769 0.6× 799 0.7× 430 0.4× 743 0.9× 67 4.6k
Conleth Feighery Ireland 32 1.3k 0.8× 347 0.3× 537 0.5× 339 0.3× 899 1.1× 125 3.7k
Rish K. Pai United States 38 1.0k 0.6× 2.1k 1.6× 1.4k 1.3× 740 0.7× 182 0.2× 181 5.2k
Nadine Ectors Belgium 34 446 0.2× 1.2k 0.9× 2.6k 2.4× 740 0.7× 479 0.6× 157 5.0k
Dhanpat Jain United States 35 461 0.3× 1.0k 0.8× 1.3k 1.2× 400 0.4× 289 0.3× 142 4.3k
Arzu Ensarı Türkiye 27 467 0.3× 585 0.5× 979 0.9× 882 0.9× 715 0.9× 142 3.0k
Marco Novelli United Kingdom 38 367 0.2× 1.6k 1.3× 2.3k 2.1× 1.3k 1.3× 386 0.5× 62 6.1k
Karsten Conrad Germany 36 1.1k 0.6× 244 0.2× 458 0.4× 757 0.8× 453 0.5× 102 4.0k
Naoki Ohmiya Japan 46 438 0.2× 1.8k 1.4× 3.8k 3.5× 572 0.6× 1.9k 2.3× 280 6.1k
Yoshiaki Nakamura Japan 29 1.9k 1.1× 2.6k 2.0× 782 0.7× 159 0.2× 257 0.3× 233 5.0k

Countries citing papers authored by Kazuo Ohtsuka

Since Specialization
Citations

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

Fields of papers citing papers by Kazuo Ohtsuka

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Kazuo Ohtsuka

This figure shows the co-authorship network connecting the top 25 collaborators of Kazuo Ohtsuka. A scholar is included among the top collaborators of Kazuo Ohtsuka 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 Kazuo Ohtsuka. Kazuo Ohtsuka 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.
Maeda, Yasuharu, Shin‐ei Kudo, Giovanni Santacroce, et al.. (2025). Evolving Role of Artificial Intelligence in Endoscopic Management of Inflammatory Bowel Disease: Diagnosis, Surveillance, and Assessment. Digestive Endoscopy. 37(11). 1148–1161.
2.
Maeda, Yasuharu, Toyoki Kudo, Noriyuki Ogata, et al.. (2025). Combination of white-light imaging–based and narrow-band imaging–based artificial intelligence models during colonoscopy in patients with ulcerative colitis. Journal of Crohn s and Colitis. 19(1). 3 indexed citations
3.
Kudo, S., Yasuharu Maeda, Tatsuya Sakurai, et al.. (2025). Clinical impact of combination of lesion-border findings and pit patterns for identifying invasive versus noninvasive neoplastic lesions in ulcerative colitis. Gastrointestinal Endoscopy. 103(3). 520–529.e3.
4.
Nemoto, Yasuhiro, Shigeru Oshima, Takashi Nagaishi, et al.. (2025). Intestinal CD4−CD8αβ−TCRαβ+ T cells function as tolerogenic antigen presenting cells in mice. Nature Communications. 16(1). 7072–7072.
5.
Tamura, Akiko, Hiromichi Shimizu, Toshimitsu Fujii, et al.. (2025). Comparative short-term efficacy of upadacitinib versus tofacitinib for ulcerative colitis: a 24-week real-world study in Japan. Intestinal Research. 24(1). 95–102. 1 indexed citations
6.
Shimizu, Hiromichi, Shuji Hibiya, Ami Kawamoto, et al.. (2024). Long-term efficacy and safety of tofacitinib in patients with ulcerative colitis: 3-year results from a real-world study. Intestinal Research. 22(3). 369–377. 3 indexed citations
7.
Maeda, Yasuharu, Shin‐ei Kudo, Masashi Muramatsu, et al.. (2024). OP16 A novel artificial intelligence-assisted Image Enhanced Endoscopy assesses accurately “vascular-healing” and predicts long-term clinical relapse in patients with ulcerative colitis: a prospective cohort study. Journal of Crohn s and Colitis. 18(Supplement_1). i31–i31. 1 indexed citations
8.
Kobayashi, Masanori, Go Ito, Ami Kawamoto, et al.. (2024). Evaluating endoscopic ultrasound-guided tissue acquisition for diagnosis of small pancreatic neuroendocrine neoplasms. SHILAP Revista de lepidopterología. 12(11). E1379–E1385. 1 indexed citations
9.
Kobayashi, Masanori, et al.. (2023). Comparison of guidewires for successful cannulation of biliary stenosis and targeting of biliary branches in ERCP. SHILAP Revista de lepidopterología. 11(9). E805–E810. 1 indexed citations
10.
Kawamoto, Ami, K Takenaka, Shuji Hibiya, et al.. (2023). Combination of leucine-rich alpha-2 glycoprotein and fecal markers detect Crohn’s disease activity confirmed by balloon-assisted enteroscopy. Intestinal Research. 22(1). 65–74. 6 indexed citations
11.
Kobayashi, Masanori, et al.. (2022). The Double-Max method: a novel method for gallbladder epithelial biopsy. VideoGIE. 7(9). 334–336. 1 indexed citations
12.
Takenaka, K, Kohei Suzuki, Toshimitsu Fujii, et al.. (2021). Pancolonic endoscopic and histologic evaluation for relapse prediction in patients with ulcerative colitis in clinical remission. Alimentary Pharmacology & Therapeutics. 53(8). 900–907. 14 indexed citations
13.
Shimizu, Hiromichi, Toshimitsu Fujii, Shuji Hibiya, et al.. (2020). Rapid prediction of 1-year efficacy of tofacitinib for treating refractory ulcerative colitis. Intestinal Research. 19(1). 115–118. 19 indexed citations
14.
Kawachi, Hiroshi, Susumu Kirimura, Yuka Hirota, et al.. (2020). Adenocarcinoma arising in the multiple heterotopic submucosal glands of the intestine in a Satoyoshi syndrome patient: A case report. Pathology International. 71(2). 147–154. 1 indexed citations
15.
Kawamoto, Ami, Sayaka Nagata, Junichi Takahashi, et al.. (2018). Ubiquitin D is Upregulated by Synergy of Notch Signalling and TNF-α in the Inflamed Intestinal Epithelia of IBD Patients. Journal of Crohn s and Colitis. 13(4). 495–509. 29 indexed citations
16.
Yamamoto, Hironori, Haruhiko Ogata, Takayuki Matsumoto, et al.. (2017). Clinical Practice Guideline for Enteroscopy. Digestive Endoscopy. 29(5). 519–546. 112 indexed citations
17.
Hayashi, Ryohei, Kiichiro Tsuchiya, K Fukushima, et al.. (2016). Reduced Human α-defensin 6 in Noninflamed Jejunal Tissue of Patients with Crohn’s Disease. Inflammatory Bowel Diseases. 22(5). 1119–1128. 15 indexed citations
18.
Fujii, Toshimitsu, Makoto Naganuma, Yoshio Kitazume, et al.. (2014). Advancing Magnetic Resonance Imaging in Crohn's Disease. Digestion. 89(1). 24–30. 24 indexed citations
19.
Kakimoto, Tetsuhiro, Shin‐ei Kudo, Hideyuki Miyachi, et al.. (2011). Sa1597 Postpolypectomy Lower Gastrointestinal Bleeding and Perforation. Gastrointestinal Endoscopy. 73(4). AB219–AB219.
20.
Suzuki, Kazuo, Tetsuharu Narita, Ryogo Yui, et al.. (1997). Induction of intestinal lesions in nu/nu mice induced by transfer of lymphocytes from syngeneic mice infected with murine retrovirus. Gut. 41(2). 221–228. 7 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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