J. Toyama

934 total citations
46 papers, 720 citations indexed

About

J. Toyama is a scholar working on Cardiology and Cardiovascular Medicine, Molecular Biology and Cellular and Molecular Neuroscience. According to data from OpenAlex, J. Toyama has authored 46 papers receiving a total of 720 indexed citations (citations by other indexed papers that have themselves been cited), including 35 papers in Cardiology and Cardiovascular Medicine, 23 papers in Molecular Biology and 20 papers in Cellular and Molecular Neuroscience. Recurrent topics in J. Toyama's work include Cardiac electrophysiology and arrhythmias (32 papers), Ion channel regulation and function (20 papers) and Neuroscience and Neural Engineering (18 papers). J. Toyama is often cited by papers focused on Cardiac electrophysiology and arrhythmias (32 papers), Ion channel regulation and function (20 papers) and Neuroscience and Neural Engineering (18 papers). J. Toyama collaborates with scholars based in Japan, United Kingdom and United States. J. Toyama's co-authors include I. Kodama, Kuniyasu Kamiya, Nobuo Tsuboi, Kei Yamada, Mark R. Boyett, Wei Guo, Ryoko Suzuki, Takafumi Anno, Toshiyuki Osaka and Hiroki Sugiura and has published in prestigious journals such as Circulation, Circulation Research and The Journal of Physiology.

In The Last Decade

J. Toyama

42 papers receiving 699 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
J. Toyama Japan 17 571 407 196 48 33 46 720
Péter Schäffer Austria 16 369 0.6× 299 0.7× 197 1.0× 26 0.5× 54 1.6× 38 629
M R Rosen United States 16 820 1.4× 574 1.4× 239 1.2× 46 1.0× 12 0.4× 30 1.0k
Massimiliano Zaniboni Italy 15 502 0.9× 443 1.1× 157 0.8× 26 0.5× 16 0.5× 32 670
Fredrik Swift Norway 15 564 1.0× 580 1.4× 156 0.8× 36 0.8× 41 1.2× 27 818
Nobuaki Sarai Japan 14 467 0.8× 438 1.1× 160 0.8× 26 0.5× 34 1.0× 30 684
J.-J. Mercadier France 14 645 1.1× 587 1.4× 125 0.6× 52 1.1× 23 0.7× 24 883
Klaus Schlotthauer United States 7 1.1k 1.9× 884 2.2× 264 1.3× 57 1.2× 31 0.9× 7 1.2k
Francien J. G. Wilms-Schopman Netherlands 14 1.1k 2.0× 638 1.6× 102 0.5× 34 0.7× 19 0.6× 17 1.2k
C. R. Horres United States 12 214 0.4× 304 0.7× 126 0.6× 96 2.0× 12 0.4× 18 464
Julio Altamirano Mexico 13 267 0.5× 430 1.1× 167 0.9× 36 0.8× 36 1.1× 20 653

Countries citing papers authored by J. Toyama

Since Specialization
Citations

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

Fields of papers citing papers by J. Toyama

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of J. Toyama

This figure shows the co-authorship network connecting the top 25 collaborators of J. Toyama. A scholar is included among the top collaborators of J. Toyama 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 J. Toyama. J. Toyama 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.
2.
3.
Matsubara, Shyuichiro, et al.. (2001). Takayasu arteritis with multiple cardiovascular complications. Heart and Vessels. 16(1). 23–27. 8 indexed citations
4.
Toyama, J., et al.. (1999). [The 13C-urea breath test efficacy in determining Helicobacter pylori eradication].. PubMed. 57(1). 93–6. 2 indexed citations
5.
Sakuma, Ichiro, Tadashi Haraguchi, Katsuhiro Ohuchi, et al.. (1998). A model analysis of aftereffects of high-intensity DC stimulation on action potential of ventricular muscle. IEEE Transactions on Biomedical Engineering. 45(2). 258–267. 9 indexed citations
6.
Takagi, K, et al.. (1998). Relaxant effects of NKH477, a new water‐soluble forskolin derivative, on guinea‐pig tracheal smooth muscle: the role of Ca2+‐activated K+ channels. British Journal of Pharmacology. 123(4). 753–761. 14 indexed citations
7.
Guo, Wei, Kuniyasu Kamiya, & J. Toyama. (1997). Immunocytochemistry of Kv1.5 potassium channel protein in cultured neonatal rat ventricular myocytes.. PubMed. Suppl 12. 165–7. 2 indexed citations
8.
Guo, Wei, Kuniyasu Kamiya, & J. Toyama. (1997). Roles of the voltage-gated K + channel subunits, Kv 1.5 and Kv 1.4, in the developmental changes of K + currents in cultured neonatal rat ventricular cells. Pflügers Archiv - European Journal of Physiology. 434(2). 206–208. 10 indexed citations
9.
Guo, Wei, et al.. (1996). Changes in action potentials and ion currents in long-term cultured neonatal rat ventricular cells. American Journal of Physiology-Cell Physiology. 271(1). C93–C102. 32 indexed citations
10.
Watanabe, Eiichi, H. Honjo, Takafumi Anno, et al.. (1995). Modulation of pacemaker activity of sinoatrial node cells by electrical load imposed by an atrial cell model. American Journal of Physiology-Heart and Circulatory Physiology. 269(5). H1735–H1742. 35 indexed citations
11.
Yasui, K., Takafumi Anno, Kuniyasu Kamiya, et al.. (1993). Contribution of potassium accumulation in narrow extracellular spaces to the genesis of nicorandil-induced large inward tail current in guinea-pig ventricular cells. Pflügers Archiv - European Journal of Physiology. 422(4). 371–379. 17 indexed citations
12.
13.
14.
Kodama, I., et al.. (1991). A combination of inactivated sodium channel blockers causes competitive interaction on dV/dtmax of single ventricular myocytes. Cardiovascular Research. 25(6). 516–522. 1 indexed citations
15.
Hattori, Yosuke, J. Toyama, & I. Kodama. (1991). Cytosolic calcium staircase in ventricular myocytes isolated from guinea pigs and rats. Cardiovascular Research. 25(8). 622–629. 15 indexed citations
16.
Kawamura, Takeshi, et al.. (1990). Combined application of class I antiarrhythmic drugs causes "additive", "reductive", or "synergistic" sodium channel block in cardiac muscles. Cardiovascular Research. 24(11). 925–931. 7 indexed citations
17.
Kodama, Itsuo, J. Toyama, & Kazuo Yamada. (1987). Competitive inhibition of cardiac sodium channels by aprindine and lidocaine studied using a maximum upstroke velocity of action potential in guinea pig ventricular muscles.. Journal of Pharmacology and Experimental Therapeutics. 241(3). 1065–1071. 12 indexed citations
18.
Toyama, J., et al.. (1986). Open and inactivated sodium channel block by class-I antiarrhythmic drugs.. PubMed. 27 Suppl 1. 83–9. 5 indexed citations
19.
Toyama, J., Toshifumi Watanabe, Hideaki Toyoshima, et al.. (1979). [Microcomputer processing system for body surface isopotential map (author's transl)].. PubMed. 17(6). 401–8. 1 indexed citations
20.
Kodama, I., et al.. (1978). Effects of l-penbutolol (Hoe 893d) on the transmembrane potentials of canine purkinje fibers and ventricular muscle fibers.. Munich Personal RePEc Archive (Ludwig Maximilian University of Munich). 231(2). 232–42. 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.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by Péter Schäffer Breakdown of academic impact, for papers by M R Rosen Breakdown of academic impact, for papers by Massimiliano Zaniboni Breakdown of academic impact, for papers by Fredrik Swift Breakdown of academic impact, for papers by Nobuaki Sarai Breakdown of academic impact, for papers by J.-J. Mercadier Breakdown of academic impact, for papers by Klaus Schlotthauer Breakdown of academic impact, for papers by Francien J. G. Wilms-Schopman Breakdown of academic impact, for papers by C. R. Horres Breakdown of academic impact, for papers by Julio Altamirano
Rankless by CCL
2026