Takahashi Kazufumi
| College of Humanities and Sciences Department of Physics | Research Assistant |
Researcher Information
Field Of Study
Career
- Apr. 2026 - Present
The University of Tokyo, Graduate School of Science Research Center for The Early Universe, Assistant professor - Apr. 2025 - Mar. 2026
Nihon University, College of Humanities and Sciences Department of Physics, Research assistant - Apr. 2024 - Mar. 2025
Yukawa Institute for Theoretical Physics, Kyoto University, Program-specific researcher, Research assistant professor - Apr. 2021 - Mar. 2024
Yukawa Institute for Theoretical Physics, Kyoto University, JSPS research fellow PD, Research assistant professor - Mar. 2020 - Mar. 2021
Kobe University, Department of Physics, Research assistant - Apr. 2019 - Feb. 2020
Kobe University, Department of Physics, Postdoctoral Researcher - Apr. 2018 - Mar. 2019
Rikkyo University, Department of Physics, Postdoctoral Fellow - Apr. 2017 - Mar. 2018
The University of Tokyo, Department of Physics, Graduate School of Science, 日本学術振興会特別研究員DC2
Research activity information
Award
- Dec. 2024
The 3rd AAPPS-JPS Award
Exploring gravity beyond general relativity - Dec. 2023
The European Physical Journal, Distinguished EPJ Referee - Dec. 2021
The 30th Workshop on General Relativity and Gravitation in Japan, Outstanding Presentation Award
Perturbations of stealth black holes in modified gravity
Paper
- Scalar quasinormal modes of rotating black holes in parity-violating gravity
Tahara, Hiroaki W.H.; Motohashi, Hayato; Takahashi, Kazufumi; Yingcharoenrat, Vicharit
Mar. 2026 - EFT of Dark Energy with Cosmic Chronometers: Reconstructing Background EFT Functions
Okamatsu, Fumiya; Takahashi, Kazufumi
Phys.Rev.D, Dec. 2025 - Probing higher curvature gravity via ringdown with overtones
Nakashi, Keisuke; Kimura, Masashi; Motohashi, Hayato; Takahashi, Kazufumi
Dec. 2025 - Dynamical Tidal Response of Non-rotating Black Holes: Connecting the MST Formalism and Worldline EFT
Kobayashi, Hajime; Mukohyama, Shinji; Oshita, Naritaka; Takahashi, Kazufumi; Yingcharoenrat, Vicharit
Phys.Rev.D, Nov. 2025 - Effective field theory of perturbations on arbitrary black hole backgrounds with spacelike scalar profile
Mukohyama, Shinji; Seraille, Emeric; Takahashi, Kazufumi; Yingcharoenrat, Vicharit
JHEP, Oct. 2025 - Resonance of black hole quasinormal modes in coupled systems
Takahashi, Takuya; Motohashi, Hayato; Takahashi, Kazufumi
Phys.Rev.D, May 2025 - Quasinormal Modes from EFT of Black Hole Perturbations in Vector-Tensor Gravity
Tomizuka, Shogo; Kobayashi, Hajime; Oshita, Naritaka; Takahashi, Kazufumi; Mukohyama, Shinji
JCAP, May 2025 - Parametrized Tidal Dissipation Numbers of Non-rotating Black Holes
Kobayashi, Hajime; Mukohyama, Shinji; Oshita, Naritaka; Takahashi, Kazufumi; Yingcharoenrat, Vicharit
Phys.Rev.D, May 2025 - Spherical black hole perturbations in EFT of scalar-tensor gravity with timelike scalar profile
Mukohyama, Shinji; Takahashi, Kazufumi; Tomikawa, Keitaro; Yingcharoenrat, Vicharit
JCAP, Mar. 2025 - Inverting no-hair theorems: How requiring General Relativity solutions restricts scalar-tensor theories
Kobayashi, Hajime; Mukohyama, Shinji; Noller, Johannes; Sirera, Sergi; Takahashi, Kazufumi; Yingcharoenrat, Vicharit
Phys.Rev.D, Mar. 2025 - Bridging dark energy and black holes with EFT: frame transformation and gravitational wave speed
Shinji Mukohyama; Emeric Seraille; Kazufumi Takahashi; Vicharit Yingcharoenrat
JCAP, Jan. 2025 - Stability and instability of the black hole greybody factors and ringdowns against a small-bump correction
Naritaka Oshita; Kazufumi Takahashi; Shinji Mukohyama
Physical Review D, Oct. 2024 - Tidal Love numbers from EFT of black hole perturbations with timelike scalar profile
Chams Gharib Ali Barura; Hajime Kobayashi; Shinji Mukohyama; Naritaka Oshita; Kazufumi Takahashi; Vicharit Yingcharoenrat
Journal of Cosmology and Astroparticle Physics, Sep. 2024 - CMB spectrum in unified EFT of dark energy: scalar-tensor and vector-tensor theories
Katsuki Aoki; Mohammad Ali Gorji; Takashi Hiramatsu; Shinji Mukohyama; Masroor C. Pookkillath; Kazufumi Takahashi
Journal of Cosmology and Astroparticle Physics, Jul. 2024 - Black holes, multiple propagation speeds, and energy extraction
Vitor Cardoso; Shinji Mukohyama; Naritaka Oshita; Kazufumi Takahashi
Physical Review D, Jun. 2024 - Exact Solution for Rotating Black Holes in Parity-Violating Gravity
Hiroaki W H Tahara; Kazufumi Takahashi; Masato Minamitsuji; Hayato Motohashi
Progress of Theoretical and Experimental Physics, Apr. 2024 - Effective field theory of black hole perturbations in vector-tensor gravity
Katsuki Aoki; Mohammad Ali Gorji; Shinji Mukohyama; Kazufumi Takahashi; Vicharit Yingcharoenrat
Journal of Cosmology and Astroparticle Physics, Mar. 2024 - Black hole ringdown from physically sensible initial value problem in higher-order scalar-tensor theories
Keisuke Nakashi; Masashi Kimura; Hayato Motohashi; Kazufumi Takahashi
Physical Review D, Jan. 2024 - Invertible disformal transformations with arbitrary higher-order derivatives
Kazufumi Takahashi
Phys.Rev.D, Oct. 2023 - Consistency of higher-derivative couplings to matter fields in scalar-tensor gravity
Ikeda, Tact; Takahashi, Kazufumi; Kobayashi, Tsutomu
Phys.Rev.D, Aug. 2023 - Quasinormal modes from EFT of black hole perturbations with timelike scalar profile
Shinji Mukohyama; Kazufumi Takahashi; Keitaro Tomikawa; Vicharit Yingcharoenrat
Journal of Cosmology and Astroparticle Physics, Jul. 2023, Refereed, Not invited - Effective description of generalized disformal theories
Kazufumi Takahashi; Masato Minamitsuji; Hayato Motohashi
Journal of Cosmology and Astroparticle Physics, Jul. 2023 - Cosmological gravity probes: Connecting recent theoretical developments to forthcoming observations
Shun Arai; Katsuki Aoki; Yuji Chinone; Rampei Kimura; Tsutomu Kobayashi; Hironao Miyatake; Daisuke Yamauchi; Shuichiro Yokoyama; Kazuyuki Akitsu; Takashi Hiramatsu; Shin'ichi Hirano; Ryotaro Kase; Taishi Katsuragawa; Yosuke Kobayashi; Toshiya Namikawa; Takahiro Nishimichi; Teppei Okumura; Maresuke Shiraishi; Masato Shirasaki; Tomomi Sunayama; Kazufumi Takahashi; Atsushi Taruya; Junsei Tokuda
Progress of Theoretical and Experimental Physics, Jul. 2023, Refereed, Invited - Approximately stealth black hole in higher-order scalar-tensor theories
Antonio De Felice; Shinji Mukohyama; Kazufumi Takahashi
Journal of Cosmology and Astroparticle Physics, Mar. 2023 - Consistency of matter coupling in modified gravity
Kazufumi Takahashi; Rampei Kimura; Hayato Motohashi
Physical Review D, Feb. 2023 - Generalized disformal Horndeski theories: cosmological perturbations and consistent matter coupling
Takahashi, Kazufumi; Minamitsuji, Masato; Motohashi, Hayato
Progress of Theoretical and Experimental Physics, Sep. 2022 - Black hole perturbations in higher-order scalar–tensor theories: initial value problem and dynamical stability
Keisuke Nakashi; Masashi Kimura; Hayato Motohashi; Kazufumi Takahashi
Classical and Quantum Gravity, Sep. 2022, Refereed - Effective field theory of gravitating continuum: solids, fluids, and aether unified
Aoki, Katsuki; Gorji, Mohammad Ali; Mukohyama, Shinji; Takahashi, Kazufumi
JCAP, Aug. 2022, Refereed - Generalized Regge-Wheeler Equation from Effective Field Theory of Black Hole Perturbations with a Timelike Scalar Profile
Mukohyama, Shinji; Takahashi, Kazufumi; Yingcharoenrat, Vicharit
JCAP, Aug. 2022 - Linear stability of black holes with static scalar hair in full Horndeski theories: Generic instabilities and surviving models
Minamitsuji, Masato; Takahashi, Kazufumi; Tsujikawa, Shinji
Phys.Rev.D, Aug. 2022, Refereed - Avoidance of Strong Coupling in General Relativity Solutions with a Timelike Scalar Profile in a Class of Ghost-Free Scalar-Tensor Theories
Antonio De Felice; Shinji Mukohyama; Kazufumi Takahashi
Physical Review Letters, Jul. 2022, Refereed - Linear stability of black holes in shift-symmetric Horndeski theories with a time-independent scalar field
Minamitsuji, Masato; Takahashi, Kazufumi; Tsujikawa, Shinji
Phys.Rev.D, May 2022, Refereed - The effective field theory of vector-tensor theories
Aoki, Katsuki; Gorji, Mohammad Ali; Mukohyama, Shinji; Takahashi, Kazufumi
JCAP, Jan. 2022, Refereed - Invertible disformal transformations with higher derivatives
Kazufumi Takahashi; Hayato Motohashi; Masato Minamitsuji
Physical Review D, Jan. 2022, Refereed - Built-in scordatura in U-DHOST
De Felice, Antonio; Mukohyama, Shinji; Takahashi, Kazufumi
Phys.Rev.Lett., 2022, Refereed - Nonlinear definition of the shadowy mode in higher-order scalar-tensor theories
De Felice, Antonio; Mukohyama, Shinji; Takahashi, Kazufumi
JCAP, Dec. 2021, Refereed - Cosmic no-hair conjecture and inflation with an SU(3) gauge field
Gao, Pengyuan; Takahashi, Kazufumi; Ito, Asuka; Soda, Jiro
Phys.Rev.D, Nov. 2021, Refereed - Black hole perturbations in DHOST theories: master variables, gradient instability, and strong coupling
Kazufumi Takahashi; Hayato Motohashi
Journal of Cosmology and Astroparticle Physics, Aug. 2021, Refereed - Theories with limited extrinsic curvature and a nonsingular anisotropic universe
Yuki Sakakihara; Daisuke Yoshida; Kazufumi Takahashi; Jerome Quintin
Physical Review D, Oct. 2020, Refereed - Effective field theory of anisotropic inflation and beyond
Jinn-Ouk Gong; Toshifumi Noumi; Gary Shiu; Jiro Soda; Kazufumi Takahashi; Masahide Yamaguchi
Journal of Cosmology and Astroparticle Physics, Aug. 2020, Refereed, Not invited - Extended cuscuton as dark energy
Aya Iyonaga; Kazufumi Takahashi; Tsutomu Kobayashi
Journal of Cosmology and Astroparticle Physics, Jul. 2020, Refereed, Not invited - General Relativity solutions with stealth scalar hair in quadratic higher-order scalar-tensor theories
Kazufumi Takahashi; Hayato Motohashi
Journal of Cosmology and Astroparticle Physics, Jun. 2020, Refereed, Not invited - Ghost-free resummation of gravitational interactions of a two-form gauge field
Kazufumi Takahashi; Daisuke Yoshida
Physical Review D, Jan. 2020, Refereed, Not invited - Linear stability analysis of hairy black holes in quadratic degenerate higher-order scalar-tensor theories: Odd-parity perturbations
Kazufumi Takahashi; Hayato Motohashi; Masato Minamitsuji
Physical Review D, Jul. 2019, Refereed, Not invited - Generalized 2D dilaton gravity and kinetic gravity braiding
Kazufumi Takahashi; Tsutomu Kobayashi
Classical and Quantum Gravity, May 2019, Refereed, Not invited - Extended cuscuton: formulation
Aya Iyonaga; Kazufumi Takahashi; Tsutomu Kobayashi
Journal of Cosmology and Astroparticle Physics, Dec. 2018, Refereed, Not invited - Extended mimetic gravity: Hamiltonian analysis and gradient instabilities
Kazufumi Takahashi; Tsutomu Kobayashi
Journal of Cosmology and Astroparticle Physics, Nov. 2017, Refereed, Not invited - Stable black holes in shift-symmetric Horndeski theories
Daria A Tretyakova; Kazufumi Takahashi
Classical and Quantum Gravity, Aug. 2017, Refereed, Not invited - General invertible transformation and physical degrees of freedom
Kazufumi Takahashi; Hayato Motohashi; Teruaki Suyama; Tsutomu Kobayashi
Physical Review D, Apr. 2017, Refereed, Not invited - Linear perturbation analysis of hairy black holes in shift-symmetric Horndeski theories: Odd-parity perturbations
Kazufumi Takahashi; Teruaki Suyama
Physical Review D, Jan. 2017, Refereed, Not invited - Fundamental theorem on gauge fixing at the action level
Hayato Motohashi; Teruaki Suyama; Kazufumi Takahashi
Physical Review D, Dec. 2016, Refereed, Not invited - Universal instability of hairy black holes in Lovelock-Galileon theories in D dimensions
Kazufumi Takahashi; Teruaki Suyama; Tsutomu Kobayashi
Physical Review D, Mar. 2016, Refereed, Not invited - 20pAT-10 Universal instability of hairy black holes in Lovelock-Galileon theories in D dimensions
Takahashi K.; Suyama T.; Kobayashi T.
Meeting Abstracts of the Physical Society of Japan, 2016 - Relation between gauge fixing and DOFs in scalar-tensor theories
Motohashi H.; Suyama T.; Takahashi K.
Meeting Abstracts of the Physical Society of Japan, 2016 - Equation of state of dark energy in f (R) gravity
Kazufumi Takahashi; Jun'Ichi Yokoyama
Physical Review D - Particles, Fields, Gravitation and Cosmology, Apr. 2015, Refereed, Not invited
Research Themes
- Testing gravity with gravitational waves from black holes
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, 01 Apr. 2023 - 31 Mar. 2028
高橋 一史 - Exploration of gravity at the strong-field regime with modified gravity
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for JSPS Fellows, 28 Apr. 2021 - 31 Mar. 2024
高橋 一史 - Systematic construction of theories of gravity with theoretical consistency
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for JSPS Fellows, 26 Apr. 2017 - 31 Mar. 2019
高橋 一史
