☕️: talks for non-specialists; ⭐️:review talks

- [pdf] [video] QFT perspectives on topological modular forms
- Online talk at TIFR, September 25, 2023.
- [pdf] [video] ☕️理論物理から新しい数学を取り出すということ
- Talk at "The World of Mathematical Sciences" at IPMU, August 25, 2023. 関西弁です。
- [pdf] [video] On asymptotic density of states in 2d CFT with symmetry
- Talk at Yasu 60 (河東泰之先生還暦記念研究会) at Komaba, July 24, 2023.
- [pdf] On new non-supersymmetric heterotic branes
- Notes prepared for a blackboard talk at Komaba, May, 2023. (I only covered §1,2 in the actual talk.)
- [pdf] [video] Main points of [2305.06196] for string theorists
- A video for string theorists on my math paper with Yamashita. May, 2023
- [pdf] Some comments on heterotic string theory
- Online talk at Peking U., March, 2023.
- [pdf] [video] On a certain non-supersymmetric heterotic 6-brane
- Hirosifest @ IPMU, October, 2022. (There was some sound problem in the video in the first half.)
- [pdf] [video] ☕️Undecidable problems in quantum field theory
- Online talk at ICTS, India, May 25, 2022.
- [pdf] On a rarely-mentioned class of 3d N=4 SCFTs
- Online talk at "Geometry, Representation Theory and Quantum Fields", Osaka City University, Japan, March 24, 2022.
- [pdf] [video] On the absence of global anomalies of heterotic string theories
- Online talk at CMSA, Harvard, USA, February 10, 2022.

Includes more recent developments than the ones below. 120min. Small corrections were made to the PDF, compared to the actually used version. - [pdf 1] [pdf 2] [video 1] [video 2] ☕ Physics and algebraic topology
- ホモトピー論シンポジウム, November 5, 2021.

Longer version of the colloquium below. PDFs were in English, but the talk was in Japanese. - [pdf] [video] Numerical Evidence for a Haagerup CFT
- Online talk at Yukawa Institute, October 19, 2021.

Unfortunately and annoyingly, the inserted Danish pronunciation of "Haagerup" was totally out of sync in the recording. An audience member later told me that it was OK during the live Zoom talk. - [pdf] [video] Matching higher symmetries across Intriligator-Seiberg duality
- Strings in Seoul, KIAS, September 3, 2021.
- [pdf] [video] On global anomalies of heterotic string theories
- Online talk at Strings 2021, ICTP-SAIFR, Brazil, June 29, 2021. Shorter version of the entry below. 30min.
- [pdf] [video] On global anomalies of heterotic string theories
- Online seminar at TIFR, India, June 7, 2021.

Longer version of the entry above. 90min. - [pdf] [video] ☕ Physics and algebraic topology
- Online colloquium at the math department of U. Tokyo, May 28, 2021.
- [pdf] [video] ☕ Life between mathematics and theoretical physics
- Online colloquium at the physics department of KAIST, April 12, 2021.

The video is from a practice session I did before the actual colloquium. The PDF is the final version. - [video 1] [video 2] [video 3] [video 4] ⭐️Lectures on anomalies
- Lectures, TASI, June, 2019. For details, see here.
- [pdf] Maxwell 理論の量子異常について
- 第七回統計物理懇談会, 学習院, March 6, 2019
- [pdf] ☕ Mathematics of QFT, by QFT, for QFT
- Seminar at Tsukuba University, October 18, 2018

English version of the talk immediately below. - [pdf] [video] ☕ 場の量子論の場の量子論による場の量子論のための数学
- 日本数学会2018年度秋季総合分科会総合講演, 岡山大学, September 25, 2018.

ひとつ上の講演の日本語版。 - [pdf] [video] ☕ ある場の量子論屋のみた数学
- 京都大学大学院 理学研究科 MACS 教育プログラム 第４回 MACSコロキウム, April 27, 2018

ひとつ上の講演とほぼ同じだが、こちらは一応学部から修士の人対象、上のは数学者対象のつもりで微妙に調整した。 - [video 1] [video 2] [video 3] [video 4] ⭐️Topological Phases and Relativistic QFTs
- Lectures, CERN Winter School, February, 2018. For details, see here.
- [pdf] [video] ☕ What is Quantum Field Theory?
- IPMU 10th anniversary workshop, October 17, 2017
- [pdf] [video] Time-reversal anomaly of 2+1d topological phases
- Strings 2017, Tel Aviv, June 26, 2017
- [pdf] ⭐️Quantum Anomalies, Old and New
- KMI Colloquium, Nagoya, March 22, 2017
- [pdf] ☕️量子重力の現状
- コロキウム, Hongo, December, 2016

(途中重力の量子補正で Donoghue 1995 を引用したが、Donoghue et al. 2002 で修正されているので注意のこと。) - [pdf] [video] On 4d N=3 theories
- JHS75, Caltech, November, 2016

The scientific content is a subset of the MIT talk below. - [video] ☕️場の量子論の数学と二次元四次元対応
- 第67回「数学との遭遇」, 中央大, 10月, 2016
- [pdf] [video] On the time-reversal anomaly of 2+1d TQFTs
- Natifest, IAS, September, 2016
- [pdf] Recent developments in 4d N=3 theories
- MIT, June, 2016
- [pdf] ☕️Supersymmetry: an idea connecting Physics and Mathematics
- Biennial meeting of Kavli Institutes, NYC, June, 2016

Aimed at scientists who are not physicists. I am not sure how successful I was. The version really used at the meeting was more abbreviated. - [pdf] ⭐️6d SCFTs and F-theory: a bottom-up perspective
- "F-theory at 20", Caltech, February, 2016
- [pdf] ☕️What is the correct framework for Quantum Field Theories?
- an internal introductory talk, IPMU, January, 2016
- [pdf] On fractional M5 branes and frozen singularities
- KIAS-YITP workshop, KIAS, September, 2015.

The version available here is not the final abbreviated version used in the actual talk, which was shorter than I expected. - [pdf] ☕️Mathematical Accidents and String Theory
- an internal colloquium-like talk, IPMU, September, 2015.

The actual title was different, but what's written above describes the content more appropriately. - [pdf] [video] ☕️What's String Theory?
- An introductory talk for undergraduate summer interns attending the UTRIP program, U. Tokyo, June, 2015. Slides are in English; the video (recorded in 2022) is in Japanese.
- [video 1] [video 2] [video 3] [video 4] ⭐S-dualities in 4d N=2 supersymmetric theories
- Trieste Spring School, March, 2015. For details, see here.
- [pdf] ☕️Confinement and the Witten index
- Kyoto Prize workshop, Kyoto, November, 2014
- [pdf] On 6d SCFTs
- Symposium Ahrenshoop, Berlin, August, 2014
- [pdf] ☕️Comments on SUSY Quantum Field Theories
- Group 30, Universiteit Gent, July, 2014
- [pdf] [video] ⭐️Recent Advances in SUSY
- Strings 2014, Princeton University, June, 2014
- video ⭐ランダム行列の半円則について
- 研究室紹介, U. Tokyo, May, 2014
- [video] Introduction to 4d SUSY QFTs with no known Lagrangians
- Internal Talk, U. Tokyo, December, 2013
- [video] On lines in class-S theories and in q-deformed Yang-Mills
- Beach talk, Simons Summer Workshop, August, 2013
- [pdf] Supersymmetric dynamics with strongly-coupled ingredients
- Nagoya University, April, 2013
- [pdf] Yet another duality for N=1 SQCD
- IAS, March, 2013
- [pdf] [video] ☕️数学と超対称ゲージ理論
- Kyushu University, September, 2012
- [pdf] On 4-dimensional defects of 6d N=(2,0) theory
- Osaka City University, April, 2012
- [pdf] ⭐️On "6=4+2"
- Rikkyo University, February, 2012
- [pdf]
On S-duality of 5d SYM on S
^{1} - Yukawa Institute, January, 2011
- [pdf] [video] On 2d TQFTs whose values are hyperkähler manifolds
- String-Math 2011, University of Pennsylvania, June, 2011
- [pdf] ⭐️Instantons and W-algebras
- Université libre de Bruxelles, May, 2011
- [pdf] 4d SYM on graphs and 3d mirror symmetry
- IHÉS, May, 2011
- [pdf] [video] More S-dualities from Outer-automorphism twists
- Rutgers, Oct, 2010
- [video 1] [video 2] ⭐Liouville Correlation Functions from Four-dimensional Gauge Theories
- Review talk, KITP, August, 2010
- [video 1] [video 2] ⭐The works of Argyres and Seiberg
- Review talk, KITP, August, 2010
- [video] Instantons and conformal blocks
- Seminar, Perimeter Institute, April, 2010
- [video] 2d CFTs from 4d N=2 gauge theories
- Annual Strings Conference, Texas A&M University, March, 2010
- [pdf] M5-branes, 4d gauge theory and 2d CFT
- Caltech, Feb, 2010 (similar to the one below, but emphasizes different points)
- [pdf] N=2 S-duality and M5-branes
- MIT, Nov, 2009
- [pdf] Some illustrative examples of Gaiotto duality
- U. Kentucky, Jul, 2009
- [video] Recent developments in 4d N=2 SCFTs
- Seminar, Rutgers, March, 2009
- [pdf] Argyres-Seiberg duality and the Higgs branch
- IPMU, Dec, 2008
- [video] Story of a & c
- Seminar, Perimeter Institute, December, 2008
- [video] ⭐Introduction to String Theory
- Review talk, Perimeter Institute, December, 2008
- [pdf] A counterexample to the `a-theorem'
- IAS, Nov, 2008
- [pdf] Comments on the non-relativistic AdS/CFT
- Michigan, Sep, 2008
- [pdf] Classification of N=6 theories of ABJM type
- McGill, Sep, 2008
- [pdf] New Developments in d=4, N=2 SCFTs
- Harvard, May, 2008
- [pdf] How does the near-horizon geometry of black rings encode its charges?
- Yukawa institute, Sep, 2007
- [pdf]
Rigid Limit in
*N*=2 Supergravity and Weak-gravity Conjecture - DAMTP, June, 2007
- [pdf] Curvature-Squared Terms in 5d Supergravity and AdS/CFT correspondence
- IAS, Feb, 2007
- [pdf] Black Hole Entropy in the presence of Chern-Simons terms
- Yukawa Inst., Dec, 2006
- [pdf] AdS/CFT correspondence with Eight Supercharges
- PhD Thesis Defense, June, 2006
- [pdf] Distribution of Vacua in Calabi-Yau Compactification
- U. Tokyo astrophysics group, March 2006
- [pdf] Triangle Anomalies from Einstein Manifolds
- Princeton, December 2005
- [pdf] 5d supergravity dual of a-maximization
- Caltech, October 2005
- [pdf] E,F,G of instantons
- Spring Meeting of the JPS, March 2005
- [pdf] ⭐️Moduli Fixing and the Statistics of Vacua
- Chuo Univ., a short review talk, January 2005
- [pdf] Vacuum Counting in Two-parameter models
- Kouchi Univ., Autumnal Meeting of the JPS, September 2004
- [pdf] 5d CS terms and Nekrasov's Instanton Counting
- KEK, seminar, August 2004
- [pdf] N=4 SYM and Integrability
- Univ. Tokyo, Hongo, Journal Club, May 2004
- [pdf] 5d CS terms and Nekrasov's Instanton Counting
- Kyushu Univ., Spring Meeting of the JPS, March 2004
- [pdf] Derivation of the Intriligator-Leigh-Seiberg linearity principle from Dijkgraaf-Vafa
- Tsukuba U., December 2002