**On the lifting property for the universal***C**-algebras of operator spaces- Tokyo University, December 1998.
- Operator Space Workshop at University of Illinois, Urbana-Champaign, March 1999.

**A non-extendable bounded linear map between***C**-algebras- Texas A&M University, April 1999.
- University of Houston, May 1999.
- Tokyo University, June 1999.

**On injectivity and nuclearity for operator spaces**(in collaboration with Effros and Ruan)- Workshop in Linear Analysis and Probability at Texas A&M University, August 1999.

**A short proof of the Oikhberg-Rosenthal theorem**- SUMIRFAS at Texas A&M University, August 1999.

**On the set of finite dimensional subspaces of preduals of von Neumann algebras**- Sur les espaces
*Lp*non-commutatifs à l'IHP, novembre 1999.

- Sur les espaces
**Local theory and local reflexivity**- CONFERENCE ON OPERATOR SPACES at IHP, January 2000.
- Tokyo University, January 2000.

**Amenable actions and exactness for discrete groups**- Séminaire d'Algèbres d'Opérateurs at Collège de France, March 2000.
- Université Pierre et Marie Curie - Paris 6, March 2000.
- Tokyo University, April 2000.

**On exactness of reduced group***C**-algebras- Cardiff University, May 2000.
- Rencontres sur la conjecture de Baum-Connes à IRMA, Strasbourg, mai 2000.
- SUMIRFAS at Texas A&M University, August 2000.
- MSRI, October 2000.

**On***OLp*spaces- Workshop in Linear Analysis and Probability at Texas A&M University, July 2000.

**On the lifting problem for separable***C**-algebras- Free Probability and Noncommutative Banach Spaces at MSRI, January 2001.

**Almost completely isometric embeddings between preduals of von Neumann algebras**- University of California at Irvine, March 2001.
- University of California at Los Angeles, May 2001.

**Exactness for free group factors**- Tokyo University, June 2001.
- Workshop in Linear Analysis and Probability at Texas A&M University, July 2001.

**Nuclearity of reduced amalgamated free product***C**-algebras- Operator Algebras and Their Applications at RIMS, September 2001.

**An application of expanders to***B(\ell_2)\otimes B(\ell_2)*- Tokyo University, October 2001.
- Annual Meeting on Operator Theory and Operator Algebras, Yufuin, November 2001.
- C*-Algebren at Mathematisches Forschungsinstitut Oberwolfach, December 2001.
- Université Pierre et Marie Curie - Paris 6 and Besançon, May 2002.
- Workshop in Linear Analysis and Probability at Texas A&M University, July 2002.
- Non-commutative Phenomena and Random Matrices at PIMS (Victoria), August 2002.

**Homotopy invariance of AF-embeddability**- Aspects of Operator Algebras at RIMS, January 2002.

**A survey on R^\omega embeddability**- Chiba University, February 2002.

**Homogeneity of the pure state space for a separable***C**-algebra- Annual Meeting of Math. Soc. Japan at Meiji Univ, March 2002.
- Operator Space Mini^2 Conference at UT Austin, July 2002.

**A survey on discrete exact groups**- UC Berkeley, September 2002.

**Application of uncountably many property T groups of Gromov to operator algebras**- UCLA, October 2002.
- UC Berkeley, November 2002.

**On Connes' Approximate Embedding Problem**- UCLA, (2 lectures) January 2003.
- Penn State University, February 2003.
- University of Illinois at Urbana-Champaign, March 2003.
- Rencontre du GdR "Algèbres d'Opérateurs" at Institut de mathématiques de Jussieu, July 2003.

**Solid von Neumann algebras**- UC Berkeley, February 2003.
- UCLA, March 2003.
- University of Illinois at Urbana-Champaign, March 2003.
- Texas A&M University, August 2003.
- WCOAS at BIRS, October 2003.

**Some prime factorization results for type II_1 factors**- Noncommutative Geometry and Applications at Vanderbilt University, May 2003.
- Recent Advances in von Neumann Algebras at UCLA, May 2003.
- GPOTS at UIUC, June 2003.
- Rencontre du GdR "Algèbres d'Opérateurs" at Institut de mathématiques de Jussieu, July 2003.

**Weakly exact von Neumann algebras**- Espaces d'opérateurs at CIRM, June 2003.
- UC Berkeley, September 2003.
- ECOAS at Vanderbilt University, September 2003.
- Noncommutative Geometry in Mathematics and Physics at CIRM, February 2004.

**A Kurosh type theorem for type II_1 factors**- UCLA, January 2004.
- AMS Sectional Meeting at Vanderbilt University, October 2004.

**New progress in the classification of group von Neumann algebras**- Math Colloquium at UCLA, January 2004.
- Kansai Operator Algebra Seminar at Kyoto University, May 2004.
- Tokyo Operator Algebra Semianr at Chiba University, June 2004.
- SUMIRFAS at Texas A&M University, August 2004.
- Math Colloquium at University of Iowa, December 2004.

**Hyperbolic groups and type II_1 factors**(minicourse)- Noncommutative Geometry in Mathematics and Physics at CIRM, February 2004.
- Penn State University, February 2004.
- Noncommutative Geometry and Operator Algebras at Vanderbilt University, May 2005.

**On exact discrete groups**- Tohoku University, May 2004.
- University of Tokyo, June 2004.

**Amenable Actions And Applications**(Slides.pdf)- Asymptotic and Probabilistic Methods in Geometric Group Theory at University of Geneva, June 2005.
- Banach Algebras and Their Applications at Bordeaux, July 2005.
- Development of Operator Algebras at RIMS, September 2005.
- Math Colloquium at Kyoto University, October 2005.
- Operator Algebras and Applications, University of Southern Denmark, April 2006.
- International Congress of Mathematicians, Madrid, August 2006. ICM Daily News (pdf)

**Survey on the CBAP**- Kansai Seminar, Osaka Kyoiku University, December 2005.

**An invitation to the similarity problem (after Pisier)**- Operator Spaces and Their Application, RIMS, January 2006.

**Property (T) for universal lattices, after Y. Shalom**- UCLA, April 2006.
- University Tokyo, July 2006.

**A comment on free group factors**(Slides.pdf)- Free Analysis, American Institute of Mathematics, June 2006.
- SUMIRFAS, Texas A&M Univ., August 2006.
- Topics on von Neumann Algebras, BIRS, September 2006.
- Domestic Workshop on Operator Theory and Operator Algebras, Tohoku University, November 2006.

**Generalized Bozejko-Picardello inequalities**- Operator Algebras and Related Fields, Hawaii, January 2007.

**Weak amenability of hyperbolic groups**- Operator spaces, non-commutative L_p-spaces and Applications, CIRM (Marseille), June 2007.
- Banach spaces and Operator spaces, Chern Institute of Mathematics (Tianjin), July 2007.
- Workshop on Structure of C*-Algebras, Fields Institute, November 2007.
- Analyse et Géométrie at Institut de Mathématiques de Jussieu, October 2009.

**Weakly exact von Neumann algebras**- Meeting on the structure of C*-algebras (Kirchbergfest), Münster, July 2007.

**Recent advances in classification of finite von Neumann algebras**- Annual Meeting of the Mathmatical Society of Japan, Saitama, March 2007.
- Banach Algebras 2007, Laval (Québec), July 2007.

**On a class of II_1 factors with at most one Cartan subalgebra**(Slides.pdf)- Operator Algebra Seminar at University of Tokyo, July 2007.
- Workshop in Analysis and Probability, Texas A&M University, August 2007.
- Operator Spaces and Group Algebras, BIRS, August 2007.
- New Development of Operator Algebras, RIMS (Kyoto), September 2007.
- Workshop on von Neumann Algebras, Fields Institute, October 2007.
- Workshop on Operator Spaces and Quantum Groups, Fields Institute, December 2007.

**Rigidity in finite von Neumann algebras**(5-hour minicourse),- Summer School in Operator Algebras University of Ottawa, August 2007.

**On a class of II_1 factors with at most one Cartan subalgebra II**(Slides.pdf)- Topics in von Neumann Algebras, BIRS, (2 lectures) March 2008.
- Operator Algebra Seminar at University of Tokyo, April 2008.
- Operator Algebras, Dynamics, and Classification, Texas A&M University, August 2008.
- Non-commutative Harmonic Analysis with Applications to Probability, Będlewo, August 2008.
- Analytic Properties of Infinite Groups, Genève, August 2008.
- von Neumann Algebras and Ergodic Theory of Group Actions, Oberwolfach, October 2008.
- Harmonic analysis, operator algebras and representations, CIRM, November 2008.
- von Neumann Algebras and Ergodic Theory, UCLA, March 2009.

**von Neumann algebras and ergodic theory**(Mini Course)- von Neumann algebras, Ergodic theory and Geometric Group theory, IMSc (Chennai), February 2009. (13.5 hours)
- Summer School: Ergodic Theory of Group Actions, Göttingen, August 2009. (4 hours)

**Dixmier's Similarity Problem**(Slides.pdf)- Colloquium at Tohoku University, April, 2009.
- Noncommutative Lp spaces, operator spaces and applications, CIRM, June 2009.
- Operator Algebra Seminar at University of Tokyo, July 2009.
- Summer School: Geometry and Rigidity of Groups, Münster, August 2009.
- Séminaire d'Algèbres d'Opérateurs at Institut de Mathématiques de Jussieu, October 2009.
- Operators and Operator Algebras University of Edinburgh, December 2009.
- Colloquium at University of Tokyo, December 2009.
- KOTAC 2010, Incheon, June 2010.
- Geometry and Analysis, Kyoto University, March 2011.
- Seminar at McGill University, April 2013.

**Hyperlinearity, sofic groups and applications to group theory**(Mini Course, 3 hours)**Quasi-homomorphism rigidity with noncommutative targets**(Slides.pdf)- Rigidity in cohomology, K-theory, geometry and ergodic theory, HIM (Bonn), November 2009.
- Functional Analysis Seminar at UCLA, March 2010.
- Colloquium at University of Hawaii, March 2010.
- Danish-Norwegian Operator Algebra Seminar, University of Copenhagen, April 2010.
- Geometry and Ergodic Theory Seminar, EPFL, April 2010.
- Recent Developments in Operator Algebras, University of Tokyo, June 2010.
- Satellite Conference on Operator Algebras to ICM 2010, IMSc (Chennai), August 2010.
- Séminaire d'Algèbres d'Opérateurs at Institut de Mathématiques de Jussieu, September 2010.
- AMS Fall Western Section Meeting, UCLA, October 2010.
- Sendai Symposium, Tohoku University, August 2011.

**Closable derivations on finite von Neumann algebras**(Mini Course, 3 hours)**Group measure space von Neumann algebras and measure group theory****Survey on weak amenability for groups**(Slides.pdf)- Japanese Western Operator Algebra Seminar, Awarayunomachi, December 2010.
- Finite Dimensional Approximations of Discrete Groups, Oberwolfach, May 2011.
- II
_{1}factors: rigidity, symmetries and classification, IHP (Paris), May 2011. - Workshop in Analysis and Probability, Texas A&M University, July 2011.
- Banach Algebras 2011, Waterloo, August 2011.
- C*-Algebras and Related Topics, RIMS, September 2011.
- von Neumann Algebras and Related Topics, RIMS, January 2012.
- K-Theory, C*-algebras and Topology of Manifolds II, Chern Institute of Mathematics (Tianjin), May 2012.
- Geometry and Analysis on Discrete Groups, Kyoto, June 2012.

**ME embeddings for groups**- Embeddings workshop, Isaac Newton Institute, January 2011.

**An introduction to sofic groups**- Sendai Symposium, Tohoku University, August 2011.

**Weak amenability for groups and its applications**(Mini Course)- Von Neumann algebras and ergodic theory of group actions, IHP (Paris), May 2011. (6 hours)
- Winter School on Operator Algebras, RIMS, December 2011. (3 hours)

**Is an irng singly generated as an ideal?**(Slides.pdf)- Operator Algebra Seminar at University of Tokyo, January 2012.
- Geometric and Analytic Aspects of Group Theory, Mittag-Leffler Institute, February 2012.
- Colloquium at Kyoto University, February 2012.

**Introduction to Connes' embedding problem**(4-hour minicourse)- Workshop on Connes' Embedding Conjecture, Neuchâtel (Switzerland), April 2012.

**More on the fixed point property of semi-direct product groups**- Workshop in Analysis and Probability, Texas A&M University, July 2012.
- Operator Algebra Seminar, KU Leuven, September 2012.
- Groupe de travail "Dynamique mesurable," ENS Lyon, December 2012.

**Survey on the classification of von Neumann factors of type II**_{1}- Australian Mathematical Society 56th Annual Meeting, Ballarat, September 2012.
- SYM Lecture, University of Copenhagen, October 2012.
- Harmonic Analysis, Operator Algebras and Representations, CIRM, October 2012.

**Connes's Embedding Problem and its equivalent**(minicourse)- Masterclass on Sofic groups and applications to operator algebras, Copenhagen, November 2012. (6 hours)
- University of Tokyo, May 2013. (10 hours)
- Noncommutative Geometry and Applications, Poiana Braşov (România), September 2013. (4 hours)
- UCLA, October 2013. (4.5 hours)
- Colloquium at Seoul National University, October 2013.

**Quantum correlations and Tsirelson's problem**(Slides.pdf)- Séminaire de géométrie et dynamique, ENS Lyon, December 2012.
- AmenAbility, EPFL, December 2012.
- Kansai Seminar, February 2013.
- C*-Algebras and Noncommutative Dynamics, Sde Boker (Israel), March 2013.
- CRM Colloquium, Montréal, April 2013.
- Operator Spaces, Harmonic Analysis and Quantum Probability, ICMAT (Madrid), June 2013.
- PRIMA congress, Shanghai, June 2013.

**Fortifications of Kazhdan's property**(4-hour minicourse)- Rigidity School, University of Tokyo, January 2013.

**Analytic approximation properties for discrete groups**(6-hour minicourse, Handwritten Notes)- School on Group C*-algebras, Sde Boker (Israel), March 2013.

**Continuous bundles of tracial von Neumann algebras**- Workshop on Operator Algebras, University of Tokyo, May 2013.
- Von Neumann Algebras and Measurable Group Theory, KU Leuven, July 2013.
- Dynamics, Geometry, and Operator Algebras, Texas A&M University, August 2013.
- C*-Algebren, Oberwolfach, August 2013.

**An amenable operator algebra which is not a C*-algebra**- Operator Algebras and Operator Theory Seminar, Seoul National University, November 2013.

**Coarse geometry of discrete groups and applications**(2-hour minicourse)- Geometry of Moduli Space of Low Dimensional Manifolds, RIMS, November 2013.

**Noncommutative real algebraic geometry of Kazhdan's property (T)**(Slides.pdf)- Séminaire Géométrie Topologie Dynamique, Orsay, February 2014.
- Séminaire Dynamique Mesurable, ENS Lyon, February 2014.
- Séminaire d'Algèbres d'Opérateurs, Paris 7, March 2014.
- Operator Algebras Seminar, Fields Institute, April 2014.
- Operator Algebra Seminar, University of Tokyo, April 2014.
- Conference on Banach methods in Noncommutative Geometry, Wuhan, June 2014.
- Colloquium, Kyoto University, July 2014.
- Classification, STructure, Amenability and Regularity, University of Glasgow, September 2014.
- von Neumann algebras and ergodic theory, UCLA, September 2014.
- Arithmetic and allied subjects on the banks of the Neva, EIMI, November 2014.
- Colloquium, UCSD, October 2015.
- Asian Mathematical Conference (Plenary Speaker), Bali, July 2016.

**Approximation Properties for Group C*-Algebras**(4-hour minicourse)- Banach and Operator Algebras over Groups, Fields Institute, April 2014.

**Introduction to Noncommutative Real Algebraic Geometry**(minicourse)- Summer Camp on Operator Algebras, Otaru, July 2014. (6 hours)
- Hyperbolic Geometry and Geometric Group Theory, University of Tokyo, July 2014. (3 hours)
- ESI winter school: Measured group theory, ESI, February 2016. (4 hours)

**Elementary amenable groups are quasidiagonal**(Slides.pdf)- Operator Algebras and Applications (ICM Satellite Conference), Cheongpung, August 2014.
- Operator Methods in Harmonic Analysis, Belfast, August 2014.

**The Furstenberg boundary and C*-simplicity**(Slides.pdf and Notes.pdf)- Kyoto Operator Algebra Seminar, RIMS, October 2014.
- Functional Analysis Seminar, UCLA, February 2015.
- Workshop on C*-algebras: Structure and Classification, WWU Münster, April 2015.
- NCGOA, Vanderbilt University, May 2015.
- Operator Algebra and Harmonic Analysis, TSIMF (Sanya), May 2015.
- Operator Algebra Seminar, University of Tokyo, June 2015.
- Noncommutative Geometry, Oberwolfach, June 2015.
- Symposium: The mathematical legacy of Uffe Haagerup, University of Copenhagen, June 2016.
- Boundaries of topological groups with applications to Lyapounov exponents, symmetric spaces, and C*-algebras, TSIMF (Sanya), December 2018.
- Maximal subgroups and (operator) subalgebras, IMPAN, September 2019. (3 hours)

**A functional analysis proof of Gromov's polynomial growth theorem**(Slides.pdf)- WCOAS, UCSD, October 2015.
- Kyoto Operator Algebra Seminar, RIMS, October 2015.
- Colloquium, Kyushu University, November 2015.
- Measured group theory, ESI, February 2016.
- Nordic Congress of Mathematics, Stockholm, March 2016.
- Seminar, École Normale Supérieure, April 2016.
- COSy, CRM, June 2016. (3 hours)
- Pacific RIM Conference on Mathematics 2016, Seoul National University, June 2016.
- MSJ-SI: Operator Algebras and Mathematical Physics, Tohoku University, August 2016. (3 hours)

**A continuum of C*-norms on B(H) \otimes B(H) and related tensor products****A remark on fullness of some group measure space von Neumann algebras****Finite-dimensional representations constructed from random walks**(Slides.pdf)- Amenability of discrete groups, AIM, September 2016.
- Operator Algebra Seminar, University of Tokyo, November 2016.
- Non-positive curvature group actions and cohomology, Newton Institute, March 2017.
- Special Week on Operator Algebras, Research Center for Operator Algebras (Shanghai), June 2017.
- Von Neumann algebras and measured group theory, Institut Henri Poincaré, July 2017.
- Seminar "Groups, Actions and von Neumann algebras", Université Paris-Sud, September 2017.
- Ergodic and Geometric Group theory in Sendai (EGGS), Tohoku University, October 2017.
- Annual Meeting on Operator Theory and Operator Algebra Theory, Ritsumeikan University, November 2017.
- Operator Algebras and its Application, IPM (Tehran), February 2018. (4 hours)
- 2018 Spring Probability Workshop, Taipei, June 2018.

**Minicourse on Connes's Embedding Problem and its equivalent**(A note on Slofstra's work)- Analysis in Quantum Information Theory, IHP, September & October 2017. (12 hours)
- Winter school on Connes' embedding problem and quantum information theory, University of Oslo, January 2019. (4 hours).

**Kazhdan's property (T) and semidefinite programming**(slides.pdf)- Kyoto Operator Algebra Seminar, RIMS, November 2017.
- Operator Algebra Seminar, University of Tokyo, December 2017.
- Colloquium, UCLA, January 2018.
- Classification of group von Neumann algebras, AIM, January 2018.
- Approximation Properties in Operator Algebras and Ergodic Theory, IPAM, April 2018.
- Interactions between Operator Space Theory and Quantum Probability with Applications to Quantum Information, MFO, May 2018.
- RIMS-IMI colloquium, RIMS, January 2019.
- Operator Algebras, Groups and Applications to Quantum Information, ICMAT (Madrid), June 2019.
- Conference: SYM 10 Years Old, University of Copenhagen, June 2019.
- Geometry and Approximation, TU Dresden, August 2019.
- Oka Symposium, Nara Women's University, November 2019.
- Groups, Dynamics, and Approximation, MFO, December 2019.
- Geometry Symposium, Zoom, September 2020.
- Colloquim, Princeton University (Zoom), February 2021.
- KTGU workshop, Kyoto University (Zoom), February 2021.

**Full factors and co-amenable inclusions**(slides.pdf)- C*-Algebras, MFO, August 2019.
- Functional Analysis Seminar, UCLA (Zoom), June 2020.

**Connes's Embedding Conjecture and Quantum Information Theory**- QIT seminar, Yukawa Institute for Theoretical Physics, May 2020.

**An entropic proof of cutoff on Ramanujan graphs**(slides.pdf)- Tokyo-Kyoto Joint Operator Algebra Seminar, Zoom, October 2020.
- Wales MPPM Seminar, Zoom, October 2020.

**(Non-normal) Conditional expectations in von Neumann algebras**(slides.pdf)- Operator Algebras and Applications (Takesaki 88), online, August 2021.