Basic Information

Email Address

• Email Address

  oshita.naritaka.7zkyoto-u.ac.jp

Professional Memberships

• From Jun. 2014, To Present

  Japan Society of Physics

Academic Degree

• 24 Mar. 2016

  東京大学修士（理学）
• 25 Mar. 2019

  東京大学博士（理学）

Academic Resume (Undergraduate School/Majors)

• 広島大学, 理学部物理科学科, 卒業

Research History

• From May 2023, To Present

  RIKEN, 数理創造プログラム, 客員研究員
• From Apr. 2023, To Present

  京都大学 白眉センター, 特定助教
• From Apr. 2021, To Mar. 2023

  RIKEN, Interdisciplinary Theoretical and Mathematical Sciences Program, Special Postdoctoral Researcher
• From Apr. 2019, To Mar. 2021

  Perimeter Institute for Theoretical Physics, JSPS Fellow

ID,URL

• ORCID ID

  0000-0002-8799-1382

• J-Global ID

  202201009452833474

• Researcher number

  50911632

researchmap URL

• https://researchmap.jp/naritaka_oshita

Research

Research Interests

• black holes
• gravity
• gravitational wave
• cosmology
• quantum field theory

Research Areas

• Natural sciences, Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics

Papers

• Reconstruction of ringdown with excitation factors

  Naritaka Oshita; Vitor Cardoso

  Physical Review D, 13 May 2025

  
• Overtones and nonlinearities in binary black hole ringdowns

  Matthew Giesler; Sizheng Ma; Keefe Mitman; Naritaka Oshita; Saul A. Teukolsky; Michael Boyle; Nils Deppe; Lawrence E. Kidder; Jordan Moxon; Kyle C. Nelli; Harald P. Pfeiffer; Mark A. Scheel; William Throwe; Nils L. Vu

  Physical Review D, 16 Apr. 2025

  
• Remote Hawking-Moss instanton and the Lorentzian path integral

  Daiki Saito; Naritaka Oshita

  Journal of High Energy Physics, 27 Feb. 2025

  
• Scalar Quasi-Normal Modes of a loop quantum black hole

  Etera R. Livine; Clara Montagnon; Naritaka Oshita; Hugo Roussille

  Journal of Cosmology and Astroparticle Physics, 01 Oct. 2024

  
• Greybody factors imprinted on black hole ringdowns. II. Merging binary black holes

  Kazumasa Okabayashi; Naritaka Oshita

  Physical Review D, 25 Sep. 2024

  
• Greybody factors imprinted on black hole ringdowns: An alternative to superposed quasinormal modes

  Naritaka Oshita

  Physical Review D, 09 May 2024

  
• Is the Coleman–de Luccia Action Minimum?: An AdS/CFT Approach

  Naritaka Oshita; Yutaro Shoji; Masahide Yamaguchi

  Progress of Theoretical and Experimental Physics, 09 May 2024

  
• Slowly decaying ringdown of a rapidly spinning black hole: Probing the no-hair theorem by small mass-ratio mergers with LISA

  Naritaka Oshita; Daichi Tsuna

  Physical Review D, 13 Nov. 2023

  
• Waveform Modelling for the Laser Interferometer Space Antenna

  LISA Consortium Waveform Working Group; Niayesh Afshordi; Sarp Akçay; Pau Amaro Seoane; Andrea Antonelli; Josu C. Aurrekoetxea; Leor Barack; Enrico Barausse; Robert Benkel; Laura Bernard; Sebastiano Bernuzzi; Emanuele Berti; Matteo Bonetti; Béatrice Bonga; Gabriele Bozzola; Richard Brito; Alessandra Buonanno; Alejandro Cárdenas-Avendaño; Marc Casals; David F. Chernoff; Alvin J. K. Chua; Katy Clough; Marta Colleoni; Mekhi Dhesi; Adrien Druart; Leanne Durkan; Guillaume Faye; Deborah Ferguson; Scott E. Field; William E. Gabella; Juan García-Bellido; Miguel Gracia-Linares; Davide Gerosa; Stephen R. Green; Maria Haney; Mark Hannam; Anna Heffernan; Tanja Hinderer; Thomas Helfer; Scott A. Hughes; Sascha Husa; Soichiro Isoyama; Michael L. Katz; Chris Kavanagh; Gaurav Khanna; Larry E. Kidder; Valeriya Korol; Lorenzo Küchler; Pablo Laguna; François Larrouturou; Alexandre Le Tiec; Benjamin Leather; Eugene A. Lim; Hyun Lim; Tyson B. Littenberg; Oliver Long; Carlos O. Lousto; Geoffrey Lovelace; Georgios Lukes-Gerakopoulos; Philip Lynch; Rodrigo P. Macedo; Charalampos Markakis; Elisa Maggio; Ilya Mandel; Andrea Maselli; Josh Mathews; Pierre Mourier; David Neilsen; Alessandro Nagar; David A. Nichols; Jan Novák; Maria Okounkova; Richard O'Shaughnessy; Naritaka Oshita; Conor O'Toole; Zhen Pan; Paolo Pani; George Pappas; Vasileios Paschalidis; Harald P. Pfeiffer; Lorenzo Pompili; Adam Pound; Geraint Pratten; Hannes R. Rüter; Milton Ruiz; Zeyd Sam; Laura Sberna; Stuart L. Shapiro; Deirdre M. Shoemaker; Carlos F. Sopuerta; Andrew Spiers; Hari Sundar; Nicola Tamanini; Jonathan E. Thompson; Alexandre Toubiana; Antonios Tsokaros; Samuel D. Upton; Maarten van de Meent; Daniele Vernieri; Jeremy M. Wachter; Niels Warburton; Barry Wardell; Helvi Witek; Vojtěch Witzany; Huan Yang; Miguel Zilhão; Angelica Albertini; K. G. Arun; Miguel Bezares; Alexander Bonilla; Christian Chapman-Bird; Bradley Cownden; Kevin Cunningham; Chris Devitt; Sam Dolan; Francisco Duque; Conor Dyson; Chris L. Fryer; Jonathan R. Gair; Bruno Giacomazzo; Priti Gupta; Wen-Biao Han; Roland Haas; Eric W. Hirschmann; E. A. Huerta; Philippe Jetzer; Bernard Kelly; Mohammed Khalil; Jack Lewis; Nicole Lloyd-Ronning; Sylvain Marsat; Germano Nardini; Jakob Neef; Adrian Ottewill; Christiana Pantelidou; Gabriel Andres Piovano; Jaime Redondo-Yuste; Laura Sagunski; Leo C. Stein; Viktor Skoupý; Ulrich Sperhake; Lorenzo Speri; Thomas F. M. Spieksma; Chris Stevens; David Trestini; Alex Vañó-Viñuales

  02 Nov. 2023

  
• Polychronic tunneling: New tunneling processes experiencing Euclidean and Lorentzian evolution simultaneously

  Naritaka Oshita; Yutaro Shoji; Masahide Yamaguchi

  Physical Review D, 14 Feb. 2023

  
• 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, 28 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, 01 Sep. 2024

  
• Black holes, multiple propagation speeds, and energy extraction

  Vitor Cardoso; Shinji Mukohyama; Naritaka Oshita; Kazufumi Takahashi

  Physical Review D, 14 Jun. 2024

  
• Erratum to: Vacuum decays around spinning black holes (Journal of High Energy Physics, (2020), 2020, 1, (15), 10.1007/JHEP01(2020)015)

  Naritaka Oshita; Kazushige Ueda; Masahide Yamaguchi

  Journal of High Energy Physics, 01 Oct. 2020

  
• Black holes as seeds of baby universe

  Naritaka Oshita; Jun'ichi Yokoyama

  Proceedings of the 25th Workshop on General Relativity and Gravitation in Japan, JGRG 2015, 2015

  
• From entropy to echoes: Counting the quasi-normal modes and the quantum limit of silence

  Naritaka Oshita; Niayesh Afshordi

  Physics Letters B, Jun. 2023

  
• dS4 universe emergent from Kerr-AdS5 spacetime: bubble nucleation catalyzed by a black hole

  Issei Koga; Naritaka Oshita; Kazushige Ueda

  Journal of High Energy Physics, 15 May 2023

  
• Thermal ringdown of a Kerr black hole: overtone excitation, Fermi-Dirac statistics and greybody factor

  Naritaka Oshita

  Journal of Cosmology and Astroparticle Physics, 01 Apr. 2023

  
• Evaporation of echoing black holes

  Naritaka Oshita; Hayato Motohashi; Sousuke Noda

  PHYSICAL REVIEW D, Aug. 2022

  
• Global study of the scalar quasinormal modes of Kerr-AdS(5) black holes: Stability, thermality, and horizon area quantization

  Issei Koga; Naritaka Oshita; Kazushige Ueda

  PHYSICAL REVIEW D, Jun. 2022

  
• Vacuum decay in the Lorentzian path integral

  Takumi Hayashi; Kohei Kamada; Naritaka Oshita; Jun'ichi Yokoyama

  JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, May 2022

  
• Ease of excitation of black hole ringing: Quantifying the importance of overtones by the excitation factors

  Naritaka Oshita

  PHYSICAL REVIEW D, Dec. 2021

  
• Black hole evaporation in de Sitter space

  Ruth Gregory; Ian G. Moss; Naritaka Oshita; Sam Patrick

  CLASSICAL AND QUANTUM GRAVITY, Sep. 2021

  
• Lifshitz scaling, ringing black holes, and superradiance

  Naritaka Oshita; Niayesh Afshordi; Shinji Mukohyama

  JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, May 2021

  
• Vacuum decays around spinning black holes (vol 01, 015, 2020)

  Naritaka Oshita; Kazushige Ueda; Masahide Yamaguchi

  JOURNAL OF HIGH ENERGY PHYSICS, Oct. 2020

  
• Hawking-Moss transition with a black hole seed

  Ruth Gregory; Ian G. Moss; Naritaka Oshita; Sam Patrick

  JOURNAL OF HIGH ENERGY PHYSICS, Sep. 2020

  
• On catalyzed vacuum decay around a radiating black hole and the crisis of the electroweak vacuum

  Takumi Hayashi; Kohei Kamada; Naritaka Oshita; Jun'ichi Yokoyama

  JOURNAL OF HIGH ENERGY PHYSICS, Aug. 2020

  
• Black holes, oscillating instantons and the Hawking-Moss transition

  Ruth Gregory; Ian G. Moss; Naritaka Oshita

  JOURNAL OF HIGH ENERGY PHYSICS, Jul. 2020

  
• Quantum black hole seismology. I. Echoes, ergospheres, and spectra

  Naritaka Oshita; Daichi Tsuna; Niayesh Afshordi

  PHYSICAL REVIEW D, Jul. 2020

  
• Quantum black hole seismology. II. Applications to astrophysical black holes

  Naritaka Oshita; Daichi Tsuna; Niayesh Afshordi

  PHYSICAL REVIEW D, Jul. 2020

  
• Small-mass naked singularities censored by the Higgs field

  Naritaka Oshita

  CLASSICAL AND QUANTUM GRAVITY, Apr. 2020

  
• On reflectivity of quantum black hole horizons

  Naritaka Oshita; Qingwen Wang; Niayesh Afshordi

  JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, Apr. 2020

  
• Quantum Black Holes in the Sky

  Jahed Abedi; Niayesh Afshordi; Naritaka Oshita; Qingwen Wang

  UNIVERSE, Mar. 2020

  
• Vacuum decays around spinning black holes

  Naritaka Oshita; Kazushige Ueda; Masahide Yamaguchi

  JOURNAL OF HIGH ENERGY PHYSICS, Jan. 2020

  
• Echoes from quantum black holes

  Qingwen Wang; Naritaka Oshita; Niayesh Afshordi

  PHYSICAL REVIEW D, Jan. 2020

  
• Compact objects as the catalysts for vacuum decays

  Naritaka Oshita; Masaki Yamada; Masahide Yamaguchi

  PHYSICS LETTERS B, Apr. 2019

  
• Probing microstructure of black hole spacetimes with gravitational wave echoes

  Naritaka Oshita; Niayesh Afshordi

  PHYSICAL REVIEW D, Feb. 2019

  
• Creation of an inflationary universe out of black hole space-time

  Naritaka Oshita; Jun'ichi Yokoyama

  INTERNATIONAL JOURNAL OF MODERN PHYSICS A, Nov. 2018

  
• Creation of an inflationary universe out of a black hole

  Naritaka Oshita; Jun'ichi Yokoyama

  PHYSICS LETTERS B, Oct. 2018

  
• Generalized second law of thermodynamics and cosmological decoherence

  Naritaka Oshita

  PHYSICAL REVIEW D, Jan. 2018

  
• The black hole information paradox and highly squeezed interior quantum fluctuations

  Naritaka Oshita

  CLASSICAL AND QUANTUM GRAVITY, Oct. 2017

  
• Role of spacetime boundaries in a vierbein formulation of gravity

  Naritaka Oshita; Yi-Peng Wu

  PHYSICAL REVIEW D, Aug. 2017

  
• Unruh Radiation Produced by a Uniformly Accelerating Charged Particle in Thermal Random Motions

  Naritaka Oshita; Kazuhiro Yamamoto; Sen Zhang

  Everything about Gravity, Proceedings of the Second LeCosPA International Symposium, 31 Mar. 2017

  
• Quantum radiation produced by the entanglement of quantum fields

  Satoshi Iso; Naritaka Oshita; Rumi Tatsukawa; Kazuhiro Yamamoto; Sen Zhang

  PHYSICAL REVIEW D, Jan. 2017

  
• Entropic interpretation of the Hawking-Moss bounce

  Naritaka Oshita; Jun'ichi Yokoyama

  PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS, May 2016

  
• Quantum radiation produced by a uniformly accelerating charged particle in thermal random motion

  Naritaka Oshita; Kazuhiro Yamamoto; Sen Zhang

  PHYSICAL REVIEW D, Apr. 2016

  
• Quantum radiation from a particle in an accelerated motion coupled to vacuum fluctuations

  Naritaka Oshita; Kazuhiro Yamamoto; Sen Zhang

  PHYSICAL REVIEW D, Aug. 2015

  
• Unruh radiation produced by a uniformly accelerating charged particle coupled to vacuum fluctuations ∗

  Naritaka Oshita; Kazuhiro Yamamoto; Sen Zhang

  Proceedings of the 25th Workshop on General Relativity and Gravitation in Japan, JGRG 2015, 2015

  
• Thermal property in Brownian motion of a particle coupled to vacuum fluctuations

  Naritaka Oshita; Kazuhiro Yamamoto; Sen Zhang

  PHYSICAL REVIEW D, Jun. 2014

  

Awards

• 12 Mar. 2024

  第15回研究奨励賞(桜舞賞)(理化学研究所)
• 28 Sep. 2021

  ベストポスター（Black Hole Inside and Out 2021運営委員）
• 25 Mar. 2019

  理学系研究科研究奨励賞（東京大学大学院理学系研究科）
• 23 Sep. 2022

  第17回中村誠太郎賞（素粒子奨学会）
• 23 Mar. 2014

  成績優秀者賞（広島大学理学部）
• 11 Dec. 2015

  Outstanding Presentation Award Gold Prize（25th workshop on GRG運営委員）

External funds: Kakenhi

• Fundamental study of the black hole quasi-normal modes and gravitational-wave ringdown

  Grant-in-Aid for Early-Career Scientists

  Basic Section 15010:Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics

  Kyoto University

  大下 翔誉

  From 01 Apr. 2023, To 31 Mar. 2026, Granted

  重力波;ブラックホール

  https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23K13111/
• Fundamental study of vacuum decay towards the application to cosmology and particle physics

  Grant-in-Aid for Research Activity Start-up

  0203:Particle-, nuclear-, astro-physics, and related fields

  Institute of Physical and Chemical Research

  Naritaka Oshita

  From 30 Aug. 2021, To 31 Mar. 2023, Project Closed

  真空崩壊;宇宙論;ブラックホール;重力;経路積分;素粒子論;場の量子論

  https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21K20371/

Administration

Faculty management (title, position)

• From 01 Apr. 2023, To 31 Mar. 2024

  部局情報セキュリティ技術責任者（白眉センターセキュリティ委員会委員）