2017- 2020: Kyoto University, theoretical astrophysics group (Doctoral course)

Supervisor: Prof. Takahiro Tanaka

Dissertation title: "Infrared secular effects on our local universe and the stochastic approach to inflation"

2015-2017:  Kyoto University, theoretical astrophysics group  (Master's course)

Supervisor: Prof. Takahiro Tanaka 

Master thesis: "ドジッター背景時空上における赤外効果の統計的性質" (in Japanese) 

(corresponding paper on arXiv: 1708.01734 "Statistical nature of infrared dynamics on de Sitter background")

2010-2015: The University of Tokyo (Undergraduate course)

Organizer of workshop @Kobe U. "Kobe Workshop on Cosmology and Fundamental Physics" (4 July,2022-8 July, 2022)

Organizer of the YITP online workshop "The workshop on gravity and cosmology by young researchers 2021"(17  Mar, 2021-19 Mar, 2021)

Organizer of  "Cosmology Seminar" series at YITP (Apr. 2017-Mar. 2019) 

Nov 2023 The 2nd AAPPS-JPS Award, subject: " 散乱振幅を用いた量子重力理論と低エネルギー物理間の整合性探査 (S-matrix consistency between quantum gravity and low-energy physics)"

Oct 2023 Young Scientist Award of the Physical Society of Japan, 2024 (In the field of Theoretical Particle Physics), subject: "重力理論における散乱振幅の正値性条件 (S-matrix positivity bounds for gravitational theories)"

8 Dec, 2021 Best Presentation Award Gold Prize (at the Online JGRG webinar series 2020-2021)

2021 JSPS Grant-in-Aid for Young Scientists (grant number: 21K13922)

2021 The paper  PRD103, 044017 (2021) was selected as an Edditors' suggestion in PRD

2020 Research Fellowship for Young Scientists of the Japan Society of the Promotion of Science (grant number: 20J00912)

2019 JSPS Oversea Challenge Program for Young Researchers (canceled due to the COVID-19)

29 Nov, 2019 Best Presentation Award Gold Prize (at the 29th Workshop on General Relativity and Gravitation in Japan)

15 Feb, 2019 Best Presentation Award Gold Prize (at 2019 YITP Asian-Pacific Winter School and Workshop on Gravitation and Cosmology)

2022.4-2022.9  ワークショップ演習[学部3回生向けの量子力学・統計力学等の演習授業]＠甲南大

理論演習（物理数学）TA @京都大学

量子力学演習TA @京都大学

17 Sep, 2024 (Hokkaido): "散乱振幅で探る量子重力と低エネルギー物理" (「第79回日本物理学会 AAPPS-JPS Award受賞記念講演」　（宇宙線・宇宙物理領域）)

20 June, 2023 (Online): "Gravitational positivity bounds: implications for the swampland program" (Seminar Series on String Phenomenology)

21, Mar, 2023 : (Kobe Univ.) "Gravitational positivity bounds: implications for the swampland program" (Kobe Workshop on Cosmology and Fundamental Physics 2023 )

3, Mar, 2022 : (Tohoku Univ.) "Swampland conditions from positivity bounds" (International workshop "Dawn of Gravitational-wave Cosmology and Theory of Gravity")

22, Feb, 2022 (Online): "Swampland conditions from positivity bounds" (2022 Winter NRF-JSPS Workshop in particle physics, cosmology and gravitation)

30 Nov, 2021 (Online): "Swampland conditions on scalar potentials from positivity bounds" (Seminar Series on String Phenomenology)

30 Oct, 2021 (Online): "重力子による量子デコヒーレンスについて" (「第3回ブラックホール研究会」（online）)

11-14 Oct, 2021 (YITP): "重力子による量子デコヒーレンス" (基研研究会「巨視的量子現象と量子重力」)

16 Aug, 2024(NTU seminar@National Taiwan University): "String loops and gravitational positivity bounds" (seminar, invited)

12 Dec, 2023(E-lab seminar@Nagoya University): "Gravitational positivity bounds: implications for the swampland program"(Seminar, invited)

8 Dec, 2023(CQUeST seminar@Sogang University): "Stochastic approach and quantum tunneling in de Sitter space" (Seminar, invited)

22 Nov, 2023 (cosmology group@IPMU, online): "Stochastic approach and quantum tunneling in de Sitter space" (Seminar, invited)

16 Jun, 2023 (NTU seminar@National Taiwan University): "Finite energy sum rules for gravitational Regge amplitudes"(Seminar)

9 Jun, 2023 (NTU string seminar@National Taiwan University): "Gravitational positivity bounds: implications for the swampland program"(Seminar)

8 Mar, 2023 (CHEP seminar@McGill): "Gravitational positivity bounds: implications for the swampland program"(Seminar)

6 Dec, 2022 (KEK): "Swampland program from amplitudes: gravitational positivity bounds" (Seminar, invited)

14 Dec, 2021 (Cosmology seminar series @ Kyoto University): "Positivity bounds with crossing symmetry and gravity" (Seminar, invited)

19 Nov, 2021 (Kanazawa University): "Swampland conditions on scalar potentials from positivity bounds" (Seminar, invited)

4 Dec, 2020 (The University of Tokyo): "Quantum decoherence caused by gravitons" (Online seminar, invited)

18 Nov, 2020 (Tokyo Institute of Technology): "Theoretical aspects of positivity bounds: locality and gravity" (Online seminar, invited)

21 Nov, 2019 (The University of Tokyo (Komaba)): "IR obstruction to Lorentz invariant UV completion" (Seminar, invited)

30 Jan, 2019 (Imperial College London) "On the contributions to observables from long-wavelength fluctuations during inflation" (Seminar)

18 Jun, 2019 (KEK):"IR obstruction to Lorentz invariant UV completion". (Seminar, invited)

27 Feb, 2018  (Tokyo Institute of Technology): " Classical stochastic interpretation of infrared loops in de Sitter space". (Seminar, invited)

31 Oct, 2017 (Rikkyo University): "Theoretical Consistency of Stochastic Approach". (Seminar, invited)

24 Oct, 2017 (Nagoya University): "Theoretical consistency of stochastic approach". (Seminar, invited)

[Oral] 

7 Jul, 2025(@Montréal Univ, Montréal) "False and genuine decoherence of primordial perturbations" (Dark Side of the Universe 2025)

17 Sep, 2024 (@Hokkaido Univ, Sapporo) "重力理論への正値性条件に対する弦ループ補正" (in Japanese) (JPS conference, 素粒子論領域)

1 August, 2024(@KIAS, Seoul) "String loops and gravitational positivity bounds" (Amplitudes Methods for Gravity and Cosmology II)

29 Feb, 2024(YITP, Kyoto) "Gravitational positivity bounds from finite energy sum rules"(YITP long-term workshop Gravity and Cosmology 2024)

4 July, 2023 (IBS) "Gravitational positivity bounds: implications for the swampland program"(String  Phenomenology conference 2023)

7 Apr. 2023 (Kunsan Univ.): "Gravitational positivity bounds: implications for the swampland program"(CTPU-KNU workshop)

1 Dec, 2022 (KEK) "Swampland program from amplitudes: gravitational positivity bounds" (KEK-PH2022)

12 Sep, 2022 (Online) "Phenomenological Motivation for Gravitational Positivity Bounds: A Case Study of Dark Sector Physics" (JGRG Webinar Series)

17 Mar, 2022 (Online) "重力存在下におけるpositivity boundの理論的側面" (in Japanese) (JPS conference, 素粒子論領域)

8 Jan, 2022 (Kagoshima): "Positivity bounds with crossing symmetry and gravity"(Workshop on Quantum Aspects on Gravitation)

17 Sep, 2021 (Online) "S行列のユニタリー性に基づく，スカラー場のポテンシャルへの量子重力的制限 " (in Japanese) (JPS conference, 素粒子論領域)

14 Sep, 2021 (Online) "スカラー場のポテンシャルに対するPositivity Bound" (in Japanese) (JPS conference, 宇宙線・宇宙物理領域)

23 Aug, 2021 (Online) "Quantum gravity constraints on scalar potentials from positivity bounds" (Strings and Fields 2021)

20 Nov, 2020 (Online) "Positivity bounds on low-energy gravitational EFTs" (Strings and Fields 2020)

23 Sep, 2020 (Online) "Gravitational positivity bounds" (JGRG Webinar Series)

15 Sep, 2020 (Online) "スカラーテンソル重力に対するPositivity Boundとその理論的側面" (in Japanese) (JPS conference)

25 Feb, 2020 (NTU) "Positivity bounds without locality" (Cosmology Meets CFT Correlators)

26 Dec, 2019 (NAOJ) "ローレンツ不変な高エネルギー理論の検証可能性" (in Japanese) (第32回理論懇シンポジウム)

27 Nov, 2019 (Kobe Univ.) "Suppression mechanism of large infrared quantum effects on inflationary observables" (JGRG29)

19 Sep, 2019 (Yamagata Univ.) "量子干渉効果によるストカスティックインフレーション描像の破れとその観測的帰結について" (in Japanese) (JPS conference)

22 May, 2019 (IPMU) "On the contribution of infrared secular effects to primordial fluctuations via quantum interference" (Quantum Entanglement in Cosmology)

2 April, 2019  (KMI) "IR obstruction to Lorentz invariant UV completion" (Future Perspective in Cosmology and Gravity)

1 Mar, 2019  (YITP) "IR obstructions to Lorentz invariant UV completions" (The 3rd Workshop on Gravity and Cosmology by Young Researchers)

13 Feb, 2019 (YITP) "On the violation of positivity bounds due to the non-locality" (YITP Asian-Pacific Winter School and Workshop on Gravitation and Cosmology)

8 Nov, 2018 (Rikkyo Univ.) "On the contribution of infrared secular effects to primordial fluctuations via quantum interference" (JGRG28)

14 Sep, 2018 (Shinshu Univ.) "インフレーション宇宙における赤外発散の問題とデコヒーレンスの関連性"(in Japanese)  (JPS conference)

30 Aug, 2018 (IBS) "Can deep infrared modes beyond current horizon scale affect observable primordial fluctuations?"(COSMO18)

27 July, 2018 (Keio Univ.) "Can we interpret all the IR secular effects during inflation as increasing variances in a classical statistical ensemble?"(Avenues of Quantum Field Theory in Curved Spacetime)

9 Feb, 2018 (YITP) "Theoretical Consistency of Stochastic Approach" (YITP long-term workshop, Gravity and Cosmology 2018)

12 Dec, 2017 (YITP) "Theoretical Consistency of Stochastic Approach" (CosPA 2017)

 Nov, 2017 (Hiroshima) "Theoretical consistency of stochastic approach" (JGRG27)

Sep, 2017 (Utsunomiya Univ.) "ストカスティックアプローチの理論的整合性の追求"(in Japanese)  (JPS conference)

Aug, 2017 (Paris) "Investigation of theoretical consistency of stochastic approach" (COSMO17)

 Nov, 2017 (Hiroshima) "Statistical Nature of Infrared Effects in De Sitter Background" (JGRG26)

[Poster]

10-14 June, 2024(@IAS, Princeton) "String loops and gravitational positivity bounds" (Amplitudes 2024)

9-18 Jan, 2023 (@IBS, Korea) "Positivity bounds with gravity from finite energy sum rules" (The 17th Kavli Asian Winter School on Strings, Particles and Cosmology)

9 Sep, 2021 (Online) "S行列のユニタリー性に基づく、スカラー場のポテンシャルへの量子重力的制限" (素粒子物理学の進展2021)

4-8 Mar, 2019 (@YITP, Kyoto) "Possible violation of positivity bounds for local/non-local theory" (Accelerating Universe in the Dark)

22-25 July, 2018 (@LOISIR Hotel Toyohashi)"インフレーション宇宙の赤外発散の解釈可能性"(in Japanese)(The 48th Summer School on Astronomy and Astrophysics)

19-23 Feb, 2018 (@YITP, Kyoto) "Theoretical Consistency of Stochastic Approach" (YKIS2018a symposium, General Relativity -The Next Generation-)

・Coffee etc.

・Sports: Badminton, etc.