The chart shows the distribution of publications by all Research.com ranked scientists in the field of Physics in 2026. The highlighted bar marks where Kazuya Koyama sits on this spectrum.
This scientist: 489 publications — 54th percentile
54% of scientists in this discipline score the same or lower.
The last bar groups every scientist with 1,469 publications or more.
The chart shows the D-index (discipline H-index) distribution of Physics scientists ranked by Research.com in 2026. The highlighted bar marks where Kazuya Koyama sits on this spectrum.
This scientist: 93 D-Index — 46th percentile
46% of scientists in this discipline score the same or lower.
The last bar groups every scientist with 185 D-Index or more.
His primary areas of study are Astrophysics, Dark energy, General relativity, Classical mechanics and Cosmology. His Astrophysics study incorporates themes from X ray spectra and Astronomy. His Dark energy research incorporates elements of Gravity and Theoretical physics.
His biological study spans a wide range of topics, including Gravitation, Quantum mechanics and Graviton. His Classical mechanics research is multidisciplinary, incorporating perspectives in Chameleon particle, Trispectrum, Field and Radius. His Cosmology study combines topics in areas such as Universe, Mathematical physics, Statistical physics and Non-Gaussianity, Cosmic microwave background.
His main research concerns Astrophysics, Theoretical physics, General relativity, Classical mechanics and Brane. Kazuya Koyama has included themes like X-ray and Astronomy in his Astrophysics study. Kazuya Koyama works mostly in the field of General relativity, limiting it down to topics relating to Cosmology and, in certain cases, Universe, as a part of the same area of interest.
The various areas that he examines in his Classical mechanics study include Instability and Cosmological perturbation theory. His research investigates the connection between Brane and topics such as Inflation that intersect with issues in Bispectrum and Field. Kazuya Koyama focuses mostly in the field of Dark energy, narrowing it down to matters related to Redshift and, in some cases, Statistical physics.
Kazuya Koyama mainly investigates Astrophysics, General relativity, Theoretical physics, Dark energy and Galaxy. As part of his studies on Astrophysics, he often connects relevant areas like Astronomy. His General relativity study combines topics from a wide range of disciplines, such as Stars, Cosmology, Gravity, Gravitation and Newtonian fluid.
His Theoretical physics research incorporates elements of Scalar field, Classical mechanics, Gravitational wave and De Sitter universe. He combines subjects such as Space, Universe and Redshift with his study of Dark energy. In general Galaxy study, his work on Quasar often relates to the realm of Order, thereby connecting several areas of interest.
Kazuya Koyama mostly deals with Theoretical physics, Dark energy, General relativity, Astrophysics and Scalar field. His Cosmological constant study, which is part of a larger body of work in Theoretical physics, is frequently linked to Speed of gravity, bridging the gap between disciplines. His Dark energy study integrates concerns from other disciplines, such as Gravitation, Redshift, Effective field theory and Mathematical physics.
The General relativity study combines topics in areas such as Halo, Gravity, Weak gravitational lensing, Observable and Newtonian fluid. Astrophysics is represented through his Galaxy, Dark matter and Fifth force research. His study in Scalar field is interdisciplinary in nature, drawing from both Conformal map, Scalar, Inflation and Tensor.
Roy Maartens;Kazuya Koyama
Amir Aghamousa;Jessica Aguilar;Steve Ahlen
Amir Aghamousa;Francisco Prada;Ginevra Favole;Klaus Honscheid
Gong-Bo Zhao;Gong-Bo Zhao;Marco Raveri;Marco Raveri;Levon Pogosian;Levon Pogosian;Yuting Wang;Yuting Wang
Kazuya Koyama
Jibril Ben Achour;Marco Crisostomi;Kazuya Koyama;David Langlois
Kazuya Koyama;Roy Maartens
H. Matsumoto;T. G. Tsuru;K. Koyama;H. Awaki
T. Dotani;K. Hayashida;H. Inoue;M. Itoh
Marco Crisostomi;Kazuya Koyama;Gianmassimo Tasinato
Kazuya Koyama;Roy Maartens
Enrico Barausse;Emanuele Berti;Thomas Hertog;Scott A. Hughes
Dmitry Gorbunov;Kazuya Koyama;Sergei Sibiryakov
E. Komatsu;N. Afshordi;N. Bartolo;D. Baumann
Baojiu Li;Gong-Bo Zhao;Romain Teyssier;Romain Teyssier;Kazuya Koyama
Fabio P. Silva;Kazuya Koyama
Kazuya Koyama;Gustavo Niz;Gianmassimo Tasinato
Kazuya Koyama;Gustavo Niz;Gianmassimo Tasinato
Shinpei Kobayashi;Kazuya Koyama;Jiro Soda
Kazuya Koyama
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