Keiji Ozeki

1.0k total citations
57 papers, 527 citations indexed

About

Keiji Ozeki is a scholar working on Genetics, Epidemiology and Surgery. According to data from OpenAlex, Keiji Ozeki has authored 57 papers receiving a total of 527 indexed citations (citations by other indexed papers that have themselves been cited), including 21 papers in Genetics, 19 papers in Epidemiology and 15 papers in Surgery. Recurrent topics in Keiji Ozeki's work include Inflammatory Bowel Disease (19 papers), Microscopic Colitis (11 papers) and Autoimmune and Inflammatory Disorders (10 papers). Keiji Ozeki is often cited by papers focused on Inflammatory Bowel Disease (19 papers), Microscopic Colitis (11 papers) and Autoimmune and Inflammatory Disorders (10 papers). Keiji Ozeki collaborates with scholars based in Japan, United States and Canada. Keiji Ozeki's co-authors include Hiromi Kataoka, Satoshi Tanida, Takashi Joh, Tsutomu Mizoshita, Hironobu Tsukamoto, Toshio Kamiya, Takaya Shimura, Takahito Katano, Eiji Kubota and Yoshinori Mori and has published in prestigious journals such as SHILAP Revista de lepidopterología, Gastroenterology and PLoS ONE.

In The Last Decade

Keiji Ozeki

50 papers receiving 522 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Keiji Ozeki Japan	13	147	128	109	107	106	57	527
Hironobu Tsukamoto Japan	13	124 0.8×	71 0.6×	70 0.6×	120 1.1×	166 1.6×	32	485
Maiko Kimura Japan	13	319 2.2×	118 0.9×	81 0.7×	97 0.9×	81 0.8×	28	587
Matthew B. Sturm United States	12	182 1.2×	72 0.6×	42 0.4×	143 1.3×	169 1.6×	16	615
Haiping Jiang China	15	246 1.7×	60 0.5×	47 0.4×	366 3.4×	85 0.8×	45	796
Mark Baugh United Kingdom	8	184 1.3×	159 1.2×	63 0.6×	110 1.0×	114 1.1×	9	518
Reza Shirkoohi Iran	17	464 3.2×	111 0.9×	167 1.5×	190 1.8×	87 0.8×	75	928
R. Cardin Italy	8	176 1.2×	64 0.5×	235 2.2×	50 0.5×	61 0.6×	19	668
Kingshuk Das United States	13	303 2.1×	160 1.3×	58 0.5×	138 1.3×	30 0.3×	16	669
Jennifer A. Cartwright United Kingdom	11	120 0.8×	45 0.4×	50 0.5×	58 0.5×	66 0.6×	22	465

Countries citing papers authored by Keiji Ozeki

Since Specialization

Citations

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

Fields of papers citing papers by Keiji Ozeki

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Keiji Ozeki

This figure shows the co-authorship network connecting the top 25 collaborators of Keiji Ozeki. A scholar is included among the top collaborators of Keiji Ozeki 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 Keiji Ozeki. Keiji Ozeki is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Shimura, Takaya, Makiko Sasaki, Shigeki Fukusada, et al.. (2025). Useful Bowel Preparation with Ultralow-Volume (500 mL) Polyethylene Glycol for Colonoscopy: A Retrospective Study. Digestive Diseases. 43(2). 246–252. 1 indexed citations

Kubota, Eiji, Yoshinori Mori, Yuki Kojima, et al.. (2025). Mesenchymal stem cell-derived small extracellular vesicles as a delivery vehicle of oncolytic reovirus. Life Sciences. 368. 123489–123489.

Kanno, Takuya, Takahito Katano, Takaya Shimura, et al.. (2024). Krüppel-like Factor-4-Mediated Macrophage Polarization and Phenotypic Transitions Drive Intestinal Fibrosis in THP-1 Monocyte Models In Vitro. Medicina. 60(5). 713–713. 2 indexed citations

Ozeki, Keiji, Hajime Yamazaki, Shinji Okabayashi, et al.. (2023). Immunomodulators after the discontinuation of anti‐tumor necrosis factor‐alpha antibody treatment and relapse in ulcerative colitis: A multicenter cohort study. Journal of Gastroenterology and Hepatology. 39(1). 66–73. 1 indexed citations

Okabayashi, Shinji, Hajime Yamazaki, Keiichi Tominaga, et al.. (2022). Lower effectiveness of intravenous steroid treatment for moderate‐to‐severe ulcerative colitis in hospitalised patients with older onset: a multicentre cohort study. Alimentary Pharmacology & Therapeutics. 55(12). 1569–1580. 8 indexed citations

Ozeki, Keiji, Satoshi Tanida, & Hiromi Kataoka. (2022). Aseptic Abscess Syndrome With Ulcerative Colitis and Pyoderma Gangrenosum. Clinical Gastroenterology and Hepatology. 20(10). A27–A27. 3 indexed citations

Mori, Yoshinori, Hiromi Kataoka, Masahide Ebi, et al.. (2021). Phase II Prospective Study of Trastuzumab in Combination with S-1 and Oxaliplatin (SOX100) Therapy for HER2-Positive Advanced Gastric Cancer. Journal of Gastrointestinal Cancer. 53(4). 930–938. 3 indexed citations

Sasaki, Makiko, Mamoru Tanaka, Hiroshi Ichikawa, et al.. (2021). 5-aminolaevulinic acid (5-ALA) accumulates in GIST-T1 cells and photodynamic diagnosis using 5-ALA identifies gastrointestinal stromal tumors (GISTs) in xenograft tumor models. PLoS ONE. 16(4). e0249650–e0249650. 11 indexed citations

Iwasaki, Hiroyasu, Takaya Shimura, Tomonori Yamada, et al.. (2021). Novel and Simple Criteria for Predicting Mortality of Peptic Ulcer Disease. Internal Medicine. 60(15). 2349–2356. 2 indexed citations

10.

Shimura, Takaya, Hiroyasu Iwasaki, Mika Kitagawa, et al.. (2019). Urinary Cysteine-Rich Protein 61 and Trefoil Factor 3 as Diagnostic Biomarkers for Colorectal Cancer. Translational Oncology. 12(3). 539–544. 20 indexed citations

11.

Nishie, Hirotada, Hiromi Kataoka, Hiroyuki Kato, et al.. (2018). Refractory gastric antral ulcers without Helicobacter pylori infection and non-steroidal anti-inflammatory drugs. Clinical Journal of Gastroenterology. 11(3). 251–256. 1 indexed citations

12.

Kataoka, Hiromi, Yutaka Miura, Makoto Kawaguchi, et al.. (2017). Expression and subcellular localization of AT motif binding factor 1 in colon tumours. Molecular Medicine Reports. 16(3). 3095–3102. 5 indexed citations

13.

Mizoshita, Tsutomu, Satoshi Tanida, Keiji Ozeki, et al.. (2016). Long-Term Clinical Remission in Biologically Naïve Crohn’s Disease Patients with Adalimumab Therapy, Including Analyses of Switch from Adalimumab to Infliximab. Case Reports in Gastroenterology. 10(2). 283–291. 6 indexed citations

14.

Tanida, Satoshi, Tsutomu Mizoshita, Hirotada Nishie, et al.. (2016). Long-Term Efficacy of Adalimumab in Patients With Intestinal Behcet’s Disease: Eight Consecutive Cases. Journal of Clinical Medicine Research. 8(4). 334–337. 8 indexed citations

15.

Katano, Takahito, Tsutomu Mizoshita, Hironobu Tsukamoto, et al.. (2016). Ectopic Gastric and Intestinal Phenotypes, Neuroendocrine Cell Differentiation, and SOX2 Expression Correlated With Early Tumor Progression in Colorectal Laterally Spreading Tumors. Clinical Colorectal Cancer. 16(2). 141–146. 3 indexed citations

16.

Tsukamoto, Hironobu, Tsutomu Mizoshita, Takahito Katano, et al.. (2015). Preventive effect of rebamipide on N-methyl-N′-nitro-N-nitrosoguanidine-induced gastric carcinogenesis in rats. Experimental and Toxicologic Pathology. 67(3). 271–277. 15 indexed citations

17.

Tanida, Satoshi, Tsutomu Mizoshita, Keiji Ozeki, et al.. (2014). The First Case of Biological Therapy Discontinuation After a Complete Remission Induced by Maintenance Therapy With Adalimumab for Refractory Ulcerative Colitis. Journal of Clinical Medicine Research. 7(2). 118–121. 2 indexed citations

18.

Tsukamoto, Hironobu, Satoshi Tanida, Tsutomu Mizoshita, et al.. (2013). Infliximab salvage therapy for patients with ulcerative colitis who failed to respond to tacrolimus. European Journal of Gastroenterology & Hepatology. 25(6). 714–718. 13 indexed citations

19.

Ozeki, Keiji, Satoshi Tanida, Takashi Mizushima, et al.. (2012). Combination Therapy with Adalimumab Plus Intensive Granulocyte and Monocyte Adsorptive Apheresis Induced Clinical Remission in a Crohn's Disease Patient with the Loss of Response to Scheduled Adalimumab Maintenance Therapy: A Case Report. Internal Medicine. 51(6). 595–599. 9 indexed citations

20.

Mizoshita, Tsutomu, Satoshi Tanida, Shigeru Kusumoto, et al.. (2012). Adalimumab therapy following granulocyte and monocyte adsorptive apheresis in a patient with Crohn’s disease accompanied by chronic myeloid leukemia. Clinical Journal of Gastroenterology. 5(4). 302–306. 5 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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