Keizo Umegaki

6.3k total citations
225 papers, 5.0k citations indexed

About

Keizo Umegaki is a scholar working on Complementary and alternative medicine, Nutrition and Dietetics and Pharmacology. According to data from OpenAlex, Keizo Umegaki has authored 225 papers receiving a total of 5.0k indexed citations (citations by other indexed papers that have themselves been cited), including 48 papers in Complementary and alternative medicine, 40 papers in Nutrition and Dietetics and 39 papers in Pharmacology. Recurrent topics in Keizo Umegaki's work include Antioxidant Activity and Oxidative Stress (28 papers), Ginkgo biloba and Cashew Applications (27 papers) and Folate and B Vitamins Research (21 papers). Keizo Umegaki is often cited by papers focused on Antioxidant Activity and Oxidative Stress (28 papers), Ginkgo biloba and Cashew Applications (27 papers) and Folate and B Vitamins Research (21 papers). Keizo Umegaki collaborates with scholars based in Japan, India and Armenia. Keizo Umegaki's co-authors include Tsuyoshi Chiba, Yoko Sato, Takako Tomita, Kazumasa Shinozuka, Ayako Sugisawa, Yōko Kubota, Michael Fenech, Philip Thomas, Shizuo Yamada and Mitsuru Higuchi and has published in prestigious journals such as PLoS ONE, American Journal of Clinical Nutrition and Diabetes Care.

In The Last Decade

Keizo Umegaki

216 papers receiving 4.8k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Keizo Umegaki Japan 38 1.1k 1.0k 846 800 665 225 5.0k
Paolo Morazzoni Italy 45 870 0.8× 1.7k 1.6× 972 1.1× 610 0.8× 547 0.8× 138 5.8k
Antonella Riva Italy 41 591 0.6× 1.6k 1.5× 491 0.6× 515 0.6× 690 1.0× 202 5.6k
Sarwat Sultana India 47 1.2k 1.1× 2.6k 2.5× 730 0.9× 909 1.1× 516 0.8× 194 7.5k
Kayoko Shimoi Japan 39 776 0.7× 1.7k 1.6× 1.3k 1.5× 324 0.4× 364 0.5× 112 5.2k
Halis Süleyman Türkiye 37 606 0.6× 1.4k 1.3× 351 0.4× 660 0.8× 436 0.7× 305 5.7k
Mehmet Kanter Türkiye 43 578 0.5× 1.0k 1.0× 413 0.5× 1.7k 2.1× 593 0.9× 150 6.2k
Markku Ahotupa Finland 44 355 0.3× 1.4k 1.3× 1.1k 1.3× 343 0.4× 749 1.1× 144 5.6k
Beata Olas Poland 41 454 0.4× 1.6k 1.6× 1.4k 1.7× 1.1k 1.4× 655 1.0× 255 6.6k
Ayman M. Mahmoud Egypt 54 1.4k 1.3× 2.8k 2.7× 730 0.9× 689 0.9× 768 1.2× 243 8.3k
Ramón Rodrigo Chile 43 925 0.9× 2.0k 1.9× 662 0.8× 309 0.4× 1.2k 1.8× 149 7.5k

Countries citing papers authored by Keizo Umegaki

Since Specialization
Citations

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

Fields of papers citing papers by Keizo Umegaki

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Keizo Umegaki

This figure shows the co-authorship network connecting the top 25 collaborators of Keizo Umegaki. A scholar is included among the top collaborators of Keizo Umegaki 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 Keizo Umegaki. Keizo Umegaki 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.
Furushima, Daisuke, et al.. (2022). Feasibility Study of a Standardized Reporting Format for Adverse Events Associated with Health Food Consumption by Health Food Manufacturers and Sellers. Rinsho yakuri/Japanese Journal of Clinical Pharmacology and Therapeutics. 53(3). 57–65.
2.
Chiba, Tsuyoshi, Etsuko Kobayashi, Takashi Okura, et al.. (2020). An educational intervention improved knowledge of dietary supplements in college students. BMC Public Health. 20(1). 633–633. 26 indexed citations
3.
Kojima, Ayako, Yoko Sato, Tsuyoshi Chiba, & Keizo Umegaki. (2018). Notable Adverse Events Associated with Concomitant Use of Health Foods and Drugs Derived from the Analysis of HFNet Data on the Safety and Effectiveness of Health Foods. Food Hygiene and Safety Science (Shokuhin Eiseigaku Zasshi). 59(2). 80–88. 1 indexed citations
4.
Ide, Kazuki, Hiroshi Yamada, Yohei Kawasaki, et al.. (2015). Methods for estimating causal relationships of adverse events with dietary supplements. BMJ Open. 5(11). e009038–e009038. 18 indexed citations
5.
Ide, Kazuki, et al.. (2013). Modification of a Dendritic Algorithm for Evaluation of Causal Relationships of Adverse Events with Health Food. Rinsho yakuri/Japanese Journal of Clinical Pharmacology and Therapeutics. 44(5). 405–410. 4 indexed citations
6.
Yamada, Hiroshi, Keiji Matsumoto, Kazuhiro Kosuge, et al.. (2012). Application of a Dendritic Algorithm for the Evaluation of Causal Relationships of Adverse Events with Health Food. Rinsho yakuri/Japanese Journal of Clinical Pharmacology and Therapeutics. 43(6). 399–402. 3 indexed citations
7.
Hashimoto, Yoko, et al.. (2011). Survey to Determine the Level of Knowledge about Food, Nutrition, and Dietary Supplements and to Identify the Information Sources in Preschool Children's Mothers. The Japanese Journal of Nutrition and Dietetics. 69(1). 39–47. 1 indexed citations
8.
Matsumoto, Keiji, et al.. (2011). . Rinsho yakuri/Japanese Journal of Clinical Pharmacology and Therapeutics. 42(4). 211–214. 1 indexed citations
9.
Umegaki, Keizo. (2010). . KAGAKU TO SEIBUTSU. 48(1). 71–73. 1 indexed citations
10.
Sato, Yoko, et al.. (2010). Influence of Analytical Method on the Fluctuation of Vitamin C Value for Vegetables Listed in the Revised Standard Table of Food Composition in Japan. The Japanese Journal of Nutrition and Dietetics. 68(2). 141–145. 1 indexed citations
11.
Ito, Yoshihiko, Yuko Taki, Satomi Onoue, et al.. (2009). Literature Search on the Interaction Between Warfarin and Vitamin K. Rinsho yakuri/Japanese Journal of Clinical Pharmacology and Therapeutics. 41(1). 43–52. 1 indexed citations
12.
Yamada, Hiroshi, et al.. (2009). . Rinsho yakuri/Japanese Journal of Clinical Pharmacology and Therapeutics. 40(4). 163–168. 4 indexed citations
13.
Ishimi, Yoshiko, K. Taku, Keizo Umegaki, & Junichiro Yamauchi. (2009). Systematic review and verification of preventive effects of soy constituents on lifestyle-related diseases: isolated soy isoflavone supplements for postmenopausal bone loss: meta-analysis of randomized controlled trials (Part II).. 12. 11–21. 3 indexed citations
14.
Matsumoto, Keiji, et al.. (2008). . Rinsho yakuri/Japanese Journal of Clinical Pharmacology and Therapeutics. 39(5). 169–172. 2 indexed citations
15.
Uchida, Shinya, Hiroshi Yamada, Xiao Dong Li, et al.. (2006). Effects of Ginkgo Biloba Extract on Pharmacokinetics and Pharmacodynamics of Tolbutamide and Midazolam in Healthy Volunteers. The Journal of Clinical Pharmacology. 46(11). 1290–1298. 90 indexed citations
16.
17.
Tomita, Takako, Yukiko Miura, Tsuyoshi Chiba, et al.. (1999). Antiatherogenic Effects of Tea Polyphenols (Flavan-3-ols) in Humans and ApoE-Deficient Mice. PubMed. 66. 471–482. 2 indexed citations
18.
Umegaki, Keizo, et al.. (1999). Effects of Sodium Alginate and Fish Oil to Reduce Trichloroethylene Accumulation i Rats.. Journal of Nutritional Science and Vitaminology. 45(2). 193–201. 1 indexed citations
19.
Umegaki, Keizo, Kazuki Nakamura, & Takako Tomita. (1986). Primary dysfunction in aggregation and secretion of SHRSP platelets: Not secondary to the circulation of ?exhausted? platelets. Annals of Hematology. 52(1). 17–27. 8 indexed citations
20.
Umegaki, Keizo, et al.. (1982). Abnormalities in platelet function in stroke prone spontaneously hypertensive rats (SHRSP). Japanese Heart Journal. 23(3). 391–391. 2 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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