Koji Usui

464 total citations
29 papers, 315 citations indexed

About

Koji Usui is a scholar working on Nephrology, Nutrition and Dietetics and Hematology. According to data from OpenAlex, Koji Usui has authored 29 papers receiving a total of 315 indexed citations (citations by other indexed papers that have themselves been cited), including 18 papers in Nephrology, 5 papers in Nutrition and Dietetics and 4 papers in Hematology. Recurrent topics in Koji Usui's work include Dialysis and Renal Disease Management (13 papers), Parathyroid Disorders and Treatments (8 papers) and Muscle and Compartmental Disorders (3 papers). Koji Usui is often cited by papers focused on Dialysis and Renal Disease Management (13 papers), Parathyroid Disorders and Treatments (8 papers) and Muscle and Compartmental Disorders (3 papers). Koji Usui collaborates with scholars based in Japan and United States. Koji Usui's co-authors include Takafumi Mizuno, Hitoshi Obata, Naoharu Mizuno, Kenji Horie, Kenichiro Shigemoto, Fuyuki Kametani, Shuji Kitagawa, Kazuo Kotani, Sonoo Mizuiri and Takayuki Naito and has published in prestigious journals such as Nutrients, American Journal of Kidney Diseases and Biochimica et Biophysica Acta (BBA) - Molecular Cell Research.

In The Last Decade

Koji Usui

25 papers receiving 303 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Koji Usui Japan 9 124 77 61 57 45 29 315
Dongmei Xu China 12 32 0.3× 56 0.7× 48 0.8× 89 1.6× 22 0.5× 18 325
Savita Bansal India 9 31 0.3× 30 0.4× 18 0.3× 89 1.6× 7 0.2× 22 384
Sana Khan United States 14 40 0.3× 10 0.1× 21 0.3× 133 2.3× 23 0.5× 33 489
Kuninobu Yokota Japan 10 71 0.6× 120 1.6× 252 4.1× 62 1.1× 3 0.1× 18 469
Anna A. Wawer United Kingdom 9 81 0.7× 9 0.1× 142 2.3× 32 0.6× 15 0.3× 11 372
Zhenzhen Cai China 12 11 0.1× 29 0.4× 83 1.4× 68 1.2× 16 0.4× 16 340
Asma Kassab Tunisia 9 59 0.5× 9 0.1× 19 0.3× 57 1.0× 12 0.3× 19 335
Athar H. Siddiqui United States 12 27 0.2× 10 0.1× 22 0.4× 82 1.4× 50 1.1× 17 472
Zejing Wei China 8 24 0.2× 29 0.4× 128 2.1× 177 3.1× 15 0.3× 8 350
Shaoxing Pi China 8 24 0.2× 29 0.4× 128 2.1× 177 3.1× 15 0.3× 8 350

Countries citing papers authored by Koji Usui

Since Specialization
Citations

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

Fields of papers citing papers by Koji Usui

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Koji Usui

This figure shows the co-authorship network connecting the top 25 collaborators of Koji Usui. A scholar is included among the top collaborators of Koji Usui 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 Koji Usui. Koji Usui 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.
Mizuiri, Sonoo, Yoshiko Nishizawa, Toshiki Doi, et al.. (2024). Absolute iron deficiency, coronary artery calcification and cardiovascular mortality in maintenance haemodialysis patients. Nephrology. 29(7). 415–421. 1 indexed citations
2.
Doi, Toshiki, Yoshiko Nishizawa, Kenichiro Shigemoto, et al.. (2022). Utility of CHA<sub>2</sub>DS<sub>2</sub>-VASc Score to Predict Mid-Term Clinical Outcomes in Hemodialysis Patients. American Journal of Nephrology. 53(2-3). 169–175. 3 indexed citations
3.
4.
Mizuiri, Sonoo, Yoshiko Nishizawa, Toshiki Doi, et al.. (2021). Iron, coronary artery calcification, and mortality in patients undergoing hemodialysis. Renal Failure. 43(1). 371–380. 15 indexed citations
5.
Mizuiri, Sonoo, Yoshiko Nishizawa, Takayuki Naito, et al.. (2019). Hypomagnesemia is not an independent risk factor for mortality in Japanese maintenance hemodialysis patients. International Urology and Nephrology. 51(6). 1043–1052. 12 indexed citations
6.
Mizuiri, Sonoo, Yoshiko Nishizawa, Takayuki Naito, et al.. (2019). Relationship of matrix Gla protein and vitamin K with vascular calcification in hemodialysis patients. Renal Failure. 41(1). 770–777. 18 indexed citations
7.
Mizuiri, Sonoo, Yoshiko Nishizawa, Koji Usui, et al.. (2019). Relationship of serum magnesium level with body composition and survival in hemodialysis patients. Hemodialysis International. 24(1). 99–107. 2 indexed citations
8.
Nakashima, Ayumu, Tōru Kawai, Koji Usui, et al.. (2010). Vitamin K<sub>2</sub> Alters Bone Metabolism Markers in Hemodialysis Patients with a Low Serum Parathyroid Hormone Level. Nephron Clinical Practice. 117(1). c15–c19. 5 indexed citations
9.
Mizuno, Takafumi, et al.. (2007). Investigation of the basis for Ni tolerance conferred by the expression of TjZnt1 and TjZnt2 in yeast strains. Plant Physiology and Biochemistry. 45(5). 371–378. 10 indexed citations
10.
Mizuno, Takafumi, et al.. (2005). Cloning of three ZIP/Nramp transporter genes from a Ni hyperaccumulator plant Thlaspi japonicum and their Ni2+-transport abilities. Plant Physiology and Biochemistry. 43(8). 793–801. 121 indexed citations
11.
Yorioka, Noriaki, Junko Tanaka, Satoru Harada, et al.. (2004). Association between ENOS gene polymorphism and cardiovascular events in nondiabetic hemodialysis patients: a prospective study. American Journal of Kidney Diseases. 44(1). 112–120. 17 indexed citations
12.
Nakashima, Ayumu, Noriaki Yorioka, Chie Tanji, et al.. (2003). Bone mineral density may be related to atherosclerosis in hemodialysis patients. Osteoporosis International. 14(5). 369–373. 11 indexed citations
13.
Usui, Koji, Osamu Yoshimura, Hiroshi Maejima, et al.. (2000). Assessment of Health-Related Quality of Life in Patients with Chronic Respiratory Failure.. Journal of Physical Therapy Science. 12(2). 119–124. 1 indexed citations
14.
Ogasawara, H., Masahiro Tsutsumi, Kazunori Takeda, et al.. (2000). Utility of Transgenic Mice Carrying Human Prototype c-Ha-ras Gene for Alternative Carcinogenicity Testing of Chemicals. Negative Results with Methapyrilene Hydrochloride.. Journal of Toxicologic Pathology. 13(3). 179–188. 5 indexed citations
15.
Yorioka, Noriaki, Koji Usui, Kenichiro Shigemoto, et al.. (1996). Hepatocyte growth factor in nephronophthisis-medullary cystic disease complex. Pediatric Nephrology. 10(4). 515–516. 3 indexed citations
16.
Harada, Satoru, Michio Yamakido, J.L. Teruel, et al.. (1996). Announcement. Nephron. 73(1). 78–78. 1 indexed citations
17.
Kitagawa, Shuji, et al.. (1991). Asymmetry of membrane fluidity in the lipid bilayer of blood platelets: Fluorescence study with diphenylhexatriene and analogs. The Journal of Membrane Biology. 119(3). 221–227. 56 indexed citations
18.
Usui, Koji, et al.. (1989). Effect of intracellular Na+ on platelet aggregation and Ca2+ mobilization. Biochimica et Biophysica Acta (BBA) - Molecular Cell Research. 1011(2-3). 117–121. 2 indexed citations
19.
Shigemoto, Kenichiro, Akira Hirabayashi, Makoto Kobayashi, et al.. (1987). Study on IgA, IgA subclass and complement in the glomerulus of IgA nephropathy by the avidin-biotin-peroxidase complex method.. PubMed. 29(3). 261–70. 2 indexed citations
20.
Kobayashi, Makoto, Akira Hirabayashi, Kenichiro Shigemoto, et al.. (1984). T lymphocyte subpopulations in patients undergoing chronic hemodialysis.. PubMed. 26(9). 1205–12. 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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