Research field (1)：
Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
Research keywords (7)：
Gravity
, Cosmology
, Relativity
, Gravitational waves
, Black holes
, Inflation
, Dark energy
Research theme for competitive and other funds (4)：
2022 - 2026 Theoretical study toward multi-messenger observations of black holes
2018 - 2022 Exploring higher-derivative theories of gravity
2018 - 2018 Signatures of the accelerated Universe
2010 - 2012 ダークエネルギー理論の構築とその観測的検証
Papers (84)：
Kazuto Takahashi, Hayato Motohashi. Iterative extraction of overtones from black hole ringdown. Classical and Quantum Gravity. 2024. 41. 19. 195023-195023
Kei-ichiro Kubota, Shun Arai, Hayato Motohashi, Shinji Mukohyama. Spin wave optics for gravitational waves lensed by a Kerr black hole. 2024
Hiroaki W H Tahara, Kazufumi Takahashi, Masato Minamitsuji, Hayato Motohashi. Exact Solution for Rotating Black Holes in Parity-Violating Gravity. Progress of Theoretical and Experimental Physics. 2024. 2024. 5
Keisuke Nakashi, Masashi Kimura, Hayato Motohashi, Kazufumi Takahashi. Black hole ringdown from physically sensible initial value problem in higher-order scalar-tensor theories. Physical Review D. 2024. 109. 2
Hayato Motohashi, Yuichiro Tada. Squeezed bispectrum and one-loop corrections in transient constant-roll inflation. Journal of Cosmology and Astroparticle Physics. 2023. 2023. 08. 069-069
2010 - 2013 The University of Tokyo Graduate School of Science Department of physics, Ph.D. course
2008 - 2010 The University of Tokyo, Graduate School of Science, Department of Physics, Master course
2006 - 2008 The University of Tokyo Faculty of Science Department of physics
2004 - 2006 The University of Tokyo College of Arts and Sciences Science I
Professional career (1)：
Ph.D. (The University of Tokyo)
Work history (8)：
2020/04 - 現在 Kogakuin University Division of Liberal Arts Associate Professor
2018/09 - 2020/03 Konan University Faculty of Science and Engineering Lecturer
2017/11 - 2020/03 Kyoto University Yukawa Institute for Theoretical Physics Research Assistant Professor
2016/11 - 2017/10 Instituto de Física Corpuscular, University of Valencia Severo Ochoa Postdoctoral Researcher
2015/09 - 2016/10 Kavli Institute for Cosmological Physics, The University of Chicago Associate fellow
2013/09 - 2015/09 Japan Society for the Promotion of Science Kavli Institute for Cosmological Physics, The University of Chicago Postdoctoral Researcher
2013/04 - 2013/09 Kyoto University Yukawa Institute for Theoretical Physics Postdoctoral Researcher
2010/04 - 2013/03 Japan Society for the Promotion of Science Research Center for the Early Universe, The University of Tokyo Researcher
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Awards (4)：
2023/07 - Association of Asia Pacific Physical Societies (AAPPS), The Physical Society of Japan (JPS) The 1st AAPPS-JPS Award Construction of consistent scalar-tensor theories and exploration of new gravitational phenomena
2019/03 - United Japanese researchers around the world, Paper award, Discovery of analytical method for primordial black holes
2017/12 - The 27th Workshop on General Relativity and Gravitation in Japan, Presentation award
2013/03 - The University of Tokyo, Graduate School of Science, Research Award,
Association Membership(s) (6)：
International Society on General Relativity and Gravitation
, Japan General Relativity and Gravitation Community
, Japan Gravitational Wave Community
, Association of Asia-Pacific Physical Societies
, Association of Theoretical Astronomy and Astrophysics
, The Physical Society of Japan
