Presentations / awards
Presentations / awards
The one with black bold-font is a speaker.
3. iTHEMS theoretical physics seminar at RIKEN iTHEMS. (site)
"Compact Star Solutions Beyond General Relativity"
Kota Numajiri,
RIKEN, Japan, November 7th. 2023
2. YITP seminar at Yukawa Institute, Kyoto Univ. (site)
"Compact Star Configuration under F(R) Gravity"
Kota Numajiri,
Kyoto U., Japan, October 20th. 2023
1. Online Seminar for Institute of Astrophysics in Central China Normal University (poster)
"Compact star in general F(R) gravity"
Kota Numajiri,
CCNU, China, March 14th. 2022
13. Quantum Reference Frame 2025 (site)
"Towards a Healthier Quantum Cosmology within a Lorentzian Path Integral Approach"
Masazumi Honda, Hiroki Matsui, Kota Numajiri, Kazumasa Okabayashi, Takahiro Terada
Poster, Okinawa Institute of Science and Technology, Japan, October 13th. 2025
12. International Symposium on Cosmology and Particle Astrophysics (CosPA 2025) (site)
"Boulware vs. Regularity: Vacuum State on the Horizonless Regular Spacetime"
Kota Numajiri, Kazumasa Okabayashi, Shinji Mukohyama
Oral, Institute for Basic Science (IBS), Korea, July 10th. 2025
11. Quantum Gravity and Information in Expanding Universe (site)
"Jackiw-Teitelboim Gravity and Lorentzian Quantum Cosmology"
Masazumi Honda, Hiroki Matsui, Kota Numajiri, Kazumasa Okabayashi
Poster, YITP, Kyoto U., Japan, February 19th. 2025
10. The 33rd Workshop on General Relativity and Gravitation in Japan (site)
"Boulware vs. Regularity: Vacuum State on the Horizonless Regular Spacetime"
Kota Numajiri, Kazumasa Okabayashi, Shinji Mukohyama
Oral, Kindai U., Japan, December 2nd. 2024
9. COSMO'24 (site)
"Reconstruction of Gravity Theory and the Hadronic EOS via Neutron Star Observables"
Kota Numajiri, Yong-Xiang Cui, Taishi Katsuragawa, Shin'ichi Nojiri,
Oral, Kyoto U., Japan, October 24th. 2024
8. YITP long-term workshop Gravity and Cosmology 2024 (site)
"Relation of observables and the internal physics of neutron stars under F(R) gravity"
Kota Numajiri, Yong-Xiang Cui, Zu Yan, Ruifeng Huang, Taishi Katsuragawa, Shin'ichi Nojiri,
Oral, Kyoto U., Japan, February 26th. 2024
7. The 2nd young researchers' workshop of the Extreme Universe Collaboration (site)
"Quantum noise from the gravitational field with additional DOF"
Kota Numajiri, Yuki Osawa
Oral, Shirahama-so, Shiga, Japan, February 22nd. 2024
6. The 32nd Workshop on General Relativity and Gravitation in Japan (site)
"Quantum noise from the gravitational field with additional DOF"
Kota Numajiri, Yuki Osawa
Poster, Nagoya U., Japan, November 29th. 2023
5. XV International Conference on Gravitation, Astrophysics and Cosmology (ICGAC15) (site)
"Revisiting TOV Problems in F(R) Gravity"
Kota Numajiri, Yong-Xiang Cui, Taishi Katsuragawa, Shin'ichi Nojiri,
Oral, Kolon Hotel, Gyeongju, Korea, July 3rd. 2023
4. 9th Korea-Japan Workshop on Dark Energy (site)
"Revisiting TOV Problems in F(R) Gravity"
Kota Numajiri, Yong-Xiang Cui, Taishi Katsuragawa, Shin'ichi Nojiri,
Oral (online), Yonsei Univ., Korea, November 16th. 2022
3. The 31st Workshop on General Relativity and Gravitation in Japan (site)
"Revisiting TOV Problems in F(R) Gravity"
Kota Numajiri, Yong-Xiang Cui, Taishi Katsuragawa, Shin'ichi Nojiri,
Oral (online), RESCUE(Univ. of Tokyo), Japan, October 24th. 2022
2. Recent Advances in Theoretical Cosmology and Astrophysics (site)
"Tidal Deformation in F(R) Gravity"
Kota Numajiri, Taishi Katsuragawa, Shin'ichi Nojiri,
Oral (online), Greece, December 19th. 2021
1. The 30th Workshop on General Relativity and Gravitation in Japan (site)
"Compact star in general F(R) gravity: Inevitable degeneracy problem and non-integer power correction"
Kota Numajiri, Taishi Katsuragawa, Shin'ichi Nojiri,
Oral (online), Japan, December 7th. 2021
13. JPS 2025 Autumn Meeting (site)
"Compact object in the effective field theory of gravity"
(重力有効場理論におけるコンパクト天体)
Kota Numajiri, Pengju Hu, Yi Pang, Shinji Mukohyama
Oral, Hiroshima Univ. (Japan), September 17th. 2025
12. Strings and Fields 2025 (弦と場の理論) (site)
"Jackiw-Teitelboim Gravity and Lorentzian Quantum Cosmology"
Masazumi Honda, Hiroki Matsui, Kota Numajiri, Kazumasa Okabayashi
Poster, YITP, Kyoto U., Japan, July 30th. 2025
11. Testing Gravity THxOBS Japan Workshop 2024 (site)
"Reconstruction of Gravity Theory and the Hadronic EOS via Neutron Star Observables"
Kota Numajiri, Yong-Xiang Cui, Taishi Katsuragawa, Shin'ichi Nojiri,
Oral, Kyoto Univ. (Japan), October 26th. 2024
10. JPS 2024 Autumn Meeting (site)
"Consistent semiclassical effect on compact objects"
(コンパクト天体時空における整合的な準古典効果)
Kota Numajiri, Kazumasa Okabayashi, Shinji Mukohyama
Oral, Hokkaido Univ. (Japan), September 16th. 2024
9. New Physics from Gravitational Waves (site)
"Reconstruction of the Eq. of State
in Neutron Stars
under Modified Gravity "
Kota Numajiri, Yong-Xiang Cui, Taishi Katsuragawa, Shin'ichi Nojiri,
Oral, Kyoto Univ. (Japan), August 5th. 2024
8. "Gravity and Quantum" Workshop series (site)
"Quantum noise from the gravitational field with additional DOF"
Kota Numajiri, Yuki Osawa,
Oral, Kyushu Univ.(Japan), July 8th. 2024
7. JPS 2024 Spring Meeting (site)
"Quantum noise from the gravitational field with additional DOF (追加自由度のある重力場における量子ノイズの検証)"
Kota Numajiri, Yuki Osawa,
Oral (online), Japan, March 18th. 2024
6. JPS 2023 Autumn Meeting (site)
"The relation between the equation of state and mass-radius curve in F(R) gravity"
(F(R)重力理論における中性子星状態方程式と質量-半径曲線の関係)
Kota Numajiri, Yong-Xiang Cui, Zu Yan, Ruifeng Huang, Taishi Katsuragawa, Shin'ichi Nojiri,
Oral, Tohoku Univ. (Japan), September 16th. 2023
5. JPS 2023 Spring Meeting (site)
"Neutron star and its scalar hair in F(R) gravity (F(R)重力理論における中性子星とスカラー自由度)"
Kota Numajiri, Yong-Xiang Cui, Taishi Katsuragawa, Shin'ichi Nojiri,
Oral (online), Japan, March 22nd. 2023
4. JPS 2022 Autumn Meeting (site)
"Neutron star and its observables in F(R) gravity (F(R)重力理論における中性子星とその観測量)"
Kota Numajiri, Yong-Xiang Cui, Taishi Katsuragawa, Shin'ichi Nojiri,
Oral, Okayama Univ. of Sci. (Japan), September 7th. 2022
3. JPS 2022 Annual (77th) Meeting (site)
"Tidal Deformation Phenomena under the F(R) Gravity (F(R)重力理論における潮汐変形現象)"
Kota Numajiri, Taishi Katsuragawa, Shin'ichi Nojiri,
Oral (online), Japan, March 16th. 2022
2. The 51st Summer School on Astronomy and Astrophysics (第51回天文・天体物理若手夏の学校) (site)
"Theoretical Analysis on Tidal Deformation Phenomena -In General Relativity and Beyond- (潮汐変形現象に対する理論的解析: 一般相対論及びその拡張理論の観点から)"
Kota Numajiri, Taishi Katsuragawa, Shin'ichi Nojiri,
Oral (online), Japan, August 23rd. 2021
1. The 50th Summer School on Astronomy and Astrophysics (第50回天文・天体物理若手夏の学校) (site)
"Mass-radius relation for neutron stars in f(R) =R+αR^2 gravity: A comparison between purely metric and torsion formulations (f(R) =R+αR^2 gravity における中性子星の質量-半径関係: purely metric formulationと torsion formulationの比較)"
Kota Numajiri,
Oral (online), Review talk (Based on Phys. Rev. D 101 (2020) 044037), Japan, August 26th. 2020
3. 2nd KMI Flash 2023 (site)
International Advisory Board Award (awarded by Prof. J. Ellis, Prof. S. Iso, and Prof. M. Sasaki)
"The Neutron Star in F(R) Gravity"
Kota Numajiri, Yong-Xiang Cui, Taishi Katsuragawa, Shin'ichi Nojiri
Oral, KMI, Nagoya Univ., Japan, February 22nd. 2023
2. (As a member of KMI SCT) Nagoya University Presidential Award 2021 (site)
March 2022
1. H.I.H. Prince Takamado Trophy All Japan Inter-Middle School English Oratorical Contest 2012 (site)
Semi-finalist (Awarded in Tokyo district qualifying), October 2012