Keiichi Haga

918 total citations
38 papers, 662 citations indexed

About

Keiichi Haga is a scholar working on Infectious Diseases, Surgery and Epidemiology. According to data from OpenAlex, Keiichi Haga has authored 38 papers receiving a total of 662 indexed citations (citations by other indexed papers that have themselves been cited), including 12 papers in Infectious Diseases, 12 papers in Surgery and 12 papers in Epidemiology. Recurrent topics in Keiichi Haga's work include Clostridium difficile and Clostridium perfringens research (11 papers), Gut microbiota and health (11 papers) and Inflammatory Bowel Disease (8 papers). Keiichi Haga is often cited by papers focused on Clostridium difficile and Clostridium perfringens research (11 papers), Gut microbiota and health (11 papers) and Inflammatory Bowel Disease (8 papers). Keiichi Haga collaborates with scholars based in Japan and United States. Keiichi Haga's co-authors include Tomoyoshi Shibuya, Dai Ishikawa, Taro Osada, Akihito Nagahara, Kyoko Kuwahara‐Arai, Masahito Takahashi, Asako Chiba, Sachiko Miyake, Shoko Ito and Kei Nomura and has published in prestigious journals such as SHILAP Revista de lepidopterología, Gastroenterology and The American Journal of Cardiology.

In The Last Decade

Keiichi Haga

36 papers receiving 654 citations

Peers

Keiichi Haga
Lev Lichtenstein Israel
Offer Cohavy United States
Michaela Friedrichsen Germany
Chris Stevens United States
Paula Klemetti Finland
Kenneth J. Gorelick United States
S C Knight United Kingdom
Florence Deknuydt France
Mark Tremelling United Kingdom
Keren M. Rabinowitz Israel
Lev Lichtenstein Israel
Keiichi Haga
Citations per year, relative to Keiichi Haga Keiichi Haga (= 1×) peers Lev Lichtenstein

Countries citing papers authored by Keiichi Haga

Since Specialization
Citations

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

Fields of papers citing papers by Keiichi Haga

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Keiichi Haga

This figure shows the co-authorship network connecting the top 25 collaborators of Keiichi Haga. A scholar is included among the top collaborators of Keiichi Haga 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 Keiichi Haga. Keiichi Haga 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.
Nomura, Kei, Tomoyoshi Shibuya, Keiichi Haga, et al.. (2023). Enterolith Treated with a Combination of Double-Balloon Endoscopy and Cola Dissolution Therapy. Medicina. 59(3). 573–573. 1 indexed citations
2.
Murakami, Takashi, Keiichi Haga, Yoichi Akazawa, et al.. (2023). Emergency Endoscopic Hemostasis for Gastrointestinal Bleeding Using a Self-Assembling Peptide: A Case Series. Medicina. 59(5). 931–931. 4 indexed citations
3.
Nomura, Kei, et al.. (2023). Successful Treatment of Steroid-resistant Eosinophilic Gastrointestinal Disease with Mepolizumab. Internal Medicine. 62(23). 3461–3467. 1 indexed citations
4.
5.
Murakami, Takashi, Kei Nomura, Keiichi Haga, et al.. (2022). Linked color imaging improves visibility of colorectal serrated lesion by high color contrast to surrounding mucosa. Digestive Endoscopy. 34(7). 1422–1432. 7 indexed citations
6.
Haga, Keiichi, Tomoyoshi Shibuya, Taro Osada, et al.. (2022). Early Clinical Remission Is a Predictor of Long-Term Remission with the Use of Vedolizumab for Ulcerative Colitis. Biomedicines. 10(10). 2526–2526. 5 indexed citations
7.
Murakami, Takashi, et al.. (2022). Using a self-assembling peptide to achieve endoscopic hemostasis for anastomotic bleeding after ileocecal resection. SHILAP Revista de lepidopterología. 10(6). E921–E922. 2 indexed citations
8.
Ishikawa, Dai, Xiaochen Zhang, Kei Nomura, et al.. (2022). A Randomized Placebo-Controlled Trial of Combination Therapy With Post-triple-antibiotic-therapy Fecal Microbiota Transplantation and Alginate for Ulcerative Colitis: Protocol. Frontiers in Medicine. 9. 779205–779205. 10 indexed citations
9.
Chiba, Asako, Keiichi Haga, Goh Murayama, et al.. (2021). Activated Mucosal-associated Invariant T Cells Have a Pathogenic Role in a Murine Model of Inflammatory Bowel Disease. Cellular and Molecular Gastroenterology and Hepatology. 13(1). 81–93. 32 indexed citations
10.
Tomishima, Ko, Shigeto Ishii, Toshio Fujisawa, et al.. (2021). Evaluation of the Feasibility and Effectiveness of Placement of Fully Covered Self-Expandable Metallic Stents via Various Insertion Routes for Benign Biliary Strictures. Journal of Clinical Medicine. 10(11). 2397–2397. 5 indexed citations
11.
Nakajima, Akihito, Tomoyoshi Shibuya, Takashi Sasaki, et al.. (2021). Nicotine Oral Administration Attenuates DSS-Induced Colitis Through Upregulation of Indole in the Distal Colon and Rectum in Mice. Frontiers in Medicine. 8. 789037–789037. 5 indexed citations
12.
Shibuya, Tomoyoshi, Keiichi Haga, Hitoshi Tsuchihashi, et al.. (2020). Pyoderma gangrenosum in an ulcerative colitis patient during treatment with vedolizumab responded favorably to adsorptive granulocyte and monocyte apheresis. Journal of Clinical Apheresis. 35(5). 488–492. 8 indexed citations
13.
Shibuya, Tomoyoshi, Kei Nomura, Keiichi Haga, et al.. (2019). Effectiveness of Cytapheresis for Ulcerative Colitis in Special Situations: Delayed Onset of Optimum Efficacy in Elderly Patients. Digestion. 101(1). 46–52. 2 indexed citations
14.
Shibuya, Tomoyoshi, Kei Nomura, Keiichi Haga, et al.. (2019). Budesonide Foam for Ulcerative Colitis Patients Experiencing Inadequate Response to Biological Therapy. Medical Science Monitor. 25. 9855–9863. 1 indexed citations
15.
Ishikawa, Dai, Takashi Sasaki, Shoko Ito, et al.. (2019). P052 Combination therapy of fresh fecal microbial transplantation and triple-antibiotic therapy for ulcerative colitis. The American Journal of Gastroenterology. 114(1). S14–S14. 2 indexed citations
16.
Shibuya, Tomoyoshi, Keiichi Haga, Shoko Ito, et al.. (2018). Successful remission of ulcerative colitis flare-up during pregnancy with adsorptive granulomonocytapheresis plus tacrolimus. Intestinal Research. 16(3). 484–484. 4 indexed citations
17.
Hayashi, Eri, Asako Chiba, Kurisu Tada, et al.. (2016). Involvement of Mucosal-associated Invariant T cells in Ankylosing Spondylitis. The Journal of Rheumatology. 43(9). 1695–1703. 75 indexed citations
18.
Yatagai, Noboru, Hiroya Ueyama, Tomoyoshi Shibuya, et al.. (2016). Obscure gastrointestinal bleeding caused by small intestinal lipoma: a case report. Journal of Medical Case Reports. 10(1). 226–226. 8 indexed citations
19.
Ishikawa, Dai, Takashi Sasaki, Taro Osada, et al.. (2016). Changes in Intestinal Microbiota Following Combination Therapy with Fecal Microbial Transplantation and Antibiotics for Ulcerative Colitis. Inflammatory Bowel Diseases. 23(1). 116–125. 109 indexed citations
20.

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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