NameOKADA Takuzo
DepartmentDepartment of Mathematical Sciences
Job TitleProfessor Degree Obtained
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Detailed Information

Research Field/Keywords for Research Field

  • Algebraic Geometry

Education

  • 2004/03, Graduated
  • 2006/03, Master Course, Completed
  • 2009/03, Doctor Course, Completed

Employment Experience

  • 2006/04 - 2008/03
  • 2009/04 - 2011/03
  • 2011/04 - 2012/03
  • 2012/04 - 2015/05 Lecturer, Mathematics, Graduate School of Science and Engineering, Saga University
  • 2015/06 -  *  Associate Professor, Mathematics, Graduate School of Science and Engineering, Saga University
  • 2022/03 -  *  Professor, Faculty of Science and Engineering, Saga University

Field of Specialization

  • Algebra

Membership in Academic Societies

  • Mathematical Society of Japan

Awards

  • 日本数学会代数学賞 (2020/03)

Research Topics and Results

  • Stable rationality of index one Fano hypersurfaces containing a linear space 2022/09
  • Smooth weighted hypersurfaces that are not stably rational 2021/06
  • Alpha invariants of birationally bi-rigid Fano 3-folds I 2021/03
  • Stable rationality of del Pezzo fibrations of low degree over projective spaces 2020/11
  • Birational Mori fiber structures of Q-Fano 3-fold weighted complete intersections, III 2020/09
  • On birational rigidity of singular del Pezzo fibrations of degree 1 2020/08
  • Birationally superrigid Fano3-folds of codimension 4 2020/03
  • Stable rationality of cyclic covers of projective spaces 2019/08
  • Stable rationality of orbifold Fano 3-fold hypersurfaces 2019/01
  • Stable rationality of higher dimensional conic bundles 2018/06
  • Birational Mori fiber structures of Q-Fano 3-fold weighted complete intersections, II 2018/05
  • Alpha invariants of birationally rigid Fano three-folds 2018/05
  • Birationally rigid Pfaffian Fano 3-folds 2018/03
  • Q-Fano threefolds with three birational Mori fiber structures 2017/12
  • Nonrational del Pezzo fibrations admitting an action of the Klein simple group 2016/03
  • Birational Mori fiber structures of Q-Fano threefold weighted complete intersections 2014/12
  • Birational superrigidity and slope stability of Fano manifolds 2013/12
  • On the birational unboundedness of higher dimensional Q-Fano varieties 2009/09
  • Nonrational weighted hypersurfaces 2009/06

Original Articles

  • Stable rationality of index one Fano hypersurfaces containing a linear space; 2022/09
    ANNOUNCEMENT INFO.; Eur. J. Math., 8, 3, 1158-1171
    AUTHOR; Takuzo Okada
  • Smooth weighted hypersurfaces that are not stably rational; 2021/06
    ANNOUNCEMENT INFO.; Ann. Inst. Fourier (Grenoble), 71, 1, 203-237
    AUTHOR; Takuzo Okada
  • Alpha invariants of birationally bi-rigid Fano 3-folds I; 2021/03
    ANNOUNCEMENT INFO.; Eur. J. Math., 7, 1, 272-308
    AUTHOR; In-Kyun kim, Takuzo Okada, Joonyeong Won
  • Stable rationality of del Pezzo fibrations of low degree over projective spaces; 2020/11
    ANNOUNCEMENT INFO.; Int. Math. Res. Not., 2020, 23, 9075-9119
    AUTHOR; Igor Krylov, Takuzo Okada
  • Birational Mori fiber structures of Q-Fano 3-fold weighted complete intersections, III; 2020/09
    ANNOUNCEMENT INFO.; Kyoto J. Math., 60, 3, 825-893
    AUTHOR; Takuzo Okada
  • On birational rigidity of singular del Pezzo fibrations of degree 1; 2020/08
    ANNOUNCEMENT INFO.; J. Lond. Math. Soc. (2), 102, 1, 1-21
    AUTHOR; Takuzo Okada
  • Birationally superrigid Fano3-folds of codimension 4; 2020/03
    ANNOUNCEMENT INFO.; Algebra Number Theory, 14, 1, 191-212
    AUTHOR; Takuzo Okada
  • Stable rationality of cyclic covers of projective spaces; 2019/08
    ANNOUNCEMENT INFO.; Proc. Edinb. Math. Soc. (2), 62, 3, 667-682
    AUTHOR; Takuzo Okada
  • Stable rationality of orbifold Fano 3-fold hypersurfaces; 2019/01
    ANNOUNCEMENT INFO.; J. Algebraic Geom., 28, 99-138
    AUTHOR; Takuzo Okada
  • Stable rationality of higher dimensional conic bundles; 2018/06
    ANNOUNCEMENT INFO.; Épijournal de Géométrie Algébrieque, 2, 13pp
    AUTHOR; Hamid Ahmadinezhad, Takuzo Okada
  • Birational Mori fiber structures of Q-Fano 3-fold weighted complete intersections, II; 2018/05
    ANNOUNCEMENT INFO.; J. Reine Angew. Math., 738, 73-129
    AUTHOR; Takuzo Okada
  • Alpha invariants of birationally rigid Fano three-folds; 2018/05
    ANNOUNCEMENT INFO.; Int. Math. Res. Not., 2018, 9, 2745-2800
    AUTHOR; In-Kyun Kim, Joonyeong Won, Takuzo Okada
  • Birationally rigid Pfaffian Fano 3-folds; 2018/03
    ANNOUNCEMENT INFO.; Algebr. Geom., 5, 2, 160-199
    AUTHOR; Hamid Ahmadinezhad, Takuzo Okada
  • Q-Fano threefolds with three birational Mori fiber structures; 2017/12
    ANNOUNCEMENT INFO.; Advanced Studies in Pure Mathematics, Volume 75, 393-424
    AUTHOR; Takuzo Okada
  • Nonrational del Pezzo fibrations admitting an action of the Klein simple group; 2016/03
    ANNOUNCEMENT INFO.; European Journal of Mathematics, 2, 1, 319-332
    AUTHOR; Takuzo Okada
  • Birational Mori fiber structures of Q-Fano threefold weighted complete intersections; 2014/12
    ANNOUNCEMENT INFO.; Proc. London Math. Soc., 109, 6, 1549-1600
    AUTHOR; Takuzo Okada
  • Birational superrigidity and slope stability of Fano manifolds; 2013/12
    ANNOUNCEMENT INFO.; Mathematische Zeitschrift, 275, 3-4, 1109-1119
    AUTHOR; Yuji Odaka, Takuzo Okada
  • On the birational unboundedness of higher dimensional Q-Fano varieties; 2009/09
    ANNOUNCEMENT INFO.; Math. Ann., 345, 1, 195-212
    AUTHOR; Takuzo Okada
  • Nonrational weighted hypersurfaces; 2009/06
    ANNOUNCEMENT INFO.; Nagoya Math. J., 194, 1-32
    AUTHOR; Takuzo Okada

General Lectures

  • On birationally solid Fano 3-fold hypersurfaces; 2022/10
    ANNOUNCEMENT INFO.; Algebraic Geometry Seminar at IBS-CGP,Pohang, Korea
    AUTHOR; Takuzo Okada
  • Birational geometry of sextic double solids with cA points; 2021/10
    ANNOUNCEMENT INFO.; Algebraic Geometry Seminar, Online (Zoom), IBS-CGP, Pohang, Korea
    AUTHOR; Takuzo Okada
  • Birational geometry of sextic double solids with cA points; 2021/09
    ANNOUNCEMENT INFO.; Seminar of Algebraic Geometry in East Asia, Online (Zoom)
    AUTHOR; Takuzo Okada
  • K-stability of birationally superrigid Fano 3-fold weighted hypersurfaces; 2020/12
    ANNOUNCEMENT INFO.; Zoom Algebraic Geometry Seminar
    AUTHOR; Takuzo Okada
  • On K-stability of birationally superrigid Fano 3-folds; 2020/07
    ANNOUNCEMENT INFO.; 
    AUTHOR; Takuzo Okada

Invited Lecture, Special Lecture

  • Birational rigidity of certain singular Fano 3-folds; 2023/03
    ANNOUNCEMENT INFO.; The 21st Affine Algebraic Geometry Meeting, Saitama University
    AUTHOR; Takuzo Okada
  • On birationally solid Fano 3-folds; 2022/11
    ANNOUNCEMENT INFO.; Rationality, Moduli Spaces, and Related Topics, Nagoya University
    AUTHOR; Takuzo Okada
  • Birational geometry of Fano 3-fold weighted complete intersections; 2021/03
    ANNOUNCEMENT INFO.; The 19th Affine Algebraic Geometry Meeting, Saitama University (online), Saitama
    AUTHOR; Takuzo Okada
  • Birational geometry of Fano 3-fold WCIs; 2021/02
    ANNOUNCEMENT INFO.; Fano varieties and birational geometry, University of Nottingham (online), UK
    AUTHOR; Takuzo Okada
  • ファノ多様体の双有理的森ファイバー構造の研究と有理性問題への応用; 2020/03
    ANNOUNCEMENT INFO.; 
    AUTHOR; 
  • Birationally superrigid Fano 3-folds of codimension 4; 2019/11
    ANNOUNCEMENT INFO.; 
    AUTHOR; Takuzo Okada
  • On the degree of irrationality of quartic 3-folds; 2019/11
    ANNOUNCEMENT INFO.; Birational Geometry, Kahler-Einstein metrics and Degenerations, IBS-CGP, POSTECH, Pohang, Korea
    AUTHOR; Takuzo Okada
  • Birationally superrigid Fano threefolds of codimension 4; 2019/10
    ANNOUNCEMENT INFO.; Kinosaki Algebraic Geometry Symposium 2019, Kinosaki International Arts Center
    AUTHOR; Takuzo Okada
  • Birationally superrigid Fano 3-folds of codimension 4; 2019/06
    ANNOUNCEMENT INFO.; Algebraic Geometry International Conference, KIAS, Seoul, Korea
    AUTHOR; Takuzo Okada
  • Birationally superrigid Fano 3-fold of codimension 4; 2019/06
    ANNOUNCEMENT INFO.; Birational Geometry and Fano Varieties (dedicated to V. Iskovskikh), Steklov Math. Inst., Moscow, Russia
    AUTHOR; Takuzo Okada
  • On K-stability of birationally superrigid Fano 3-folds; 2019/04
    ANNOUNCEMENT INFO.; Birational Geometry, Kahler-Einstein metrics and Degenerations, HSE, Moscow, Russia
    AUTHOR; Takuzo Okada
  • K-stability and birational rigidity of Fano 3-folds, part 1, 2, 3, 4; 2018/12
    ANNOUNCEMENT INFO.; Algebraic Geometry Seminar, KIAS, Seoul, Korea
    AUTHOR; Takuzo Okada
  • Birational rigidity of del Pezzo fibrations; 2018/11
    ANNOUNCEMENT INFO.; Explicit Birational and Affine Geometry in Saitama, Saitama University
    AUTHOR; Takuzo Okada
  • Failure of stable rationality of various algebraic varieties; 2018/10
    ANNOUNCEMENT INFO.; Algebraic Geometry in East Asia, VAST, Hanoi, Vietnam
    AUTHOR; Takuzo Okada
  • On birational rigidity of singular del Pezzo fibrations of degree 1; 2018/06
    ANNOUNCEMENT INFO.; Positivity in Algebraic Geometry, Yonsei University, Seoul, Korea
    AUTHOR; Takuzo Okada
  • Failure of stable rationality of various algebraic varieties via reduction modulo p; 2018/05
    ANNOUNCEMENT INFO.; Birational Geometry and Arithmetic, ICERM, Providence, RI (USA)
    AUTHOR; Takuzo Okada
  • On birational rigidity of singular del Pezzo fibrations of degree 1; 2018/03
    ANNOUNCEMENT INFO.; The 16th Affine Algebraic Geometry Meeting, Kwansai Gakuin University, Osaka
    AUTHOR; Takuzo Okada
  • On stable rationality problem of Fano varieties; 2017/09
    ANNOUNCEMENT INFO.; Stability, Boundedness and Fano varieties, BICMR, China
    AUTHOR; Takuzo Okada
  • Smooth weighted hypersurfaces that are not stably rational; 2017/06
    ANNOUNCEMENT INFO.; Birkar's boundedness and Cremona groups, University of Edinburgh, UK
    AUTHOR; Takuzo Okada
  • On stable rationality of del Pezzo fibrations; 2017/03
    ANNOUNCEMENT INFO.; The 15th Affine Algebraic Geometry Meeting, Kwansei Gakuin University, Osaka Umeda Campus
    AUTHOR; Takuzo Okada
  • Stable rationality of conic bundles over projective spaces; 2017/03
    ANNOUNCEMENT INFO.; 
    AUTHOR; 
  • Stable rationality of higher dimensional conic bundles; 2017/03
    ANNOUNCEMENT INFO.; 
    AUTHOR; 
  • Stable rationality of orbifold Fano 3-fold hypersurfaces; 2016/10
    ANNOUNCEMENT INFO.; Kinosaki Algebraic Symposium 2016, Kinosaki International Arts Center
    AUTHOR; Takuzo Okada
  • Stable rationality of orbifold Fano 3-fold hypersurfaces; 2016/07
    ANNOUNCEMENT INFO.; Rationality and selfmaps, RIMS, Kyoto
    AUTHOR; Takuzo Okada
  • Stable rationality of cyclic covers and some orbifold Fano 3-folds; 2016/06
    ANNOUNCEMENT INFO.; Workshop on birational geometry and reduction to positive characteristic, University of Edinburgh, UK
    AUTHOR; Takuzo Okada
  • On log canonical thresholds of birationally rigid Fano threefolds; 2016/03
    ANNOUNCEMENT INFO.; The 14th Affine Algebraic Geometry Meeting, Kwansei Gakuin University, Osaka Umeda Campus
    AUTHOR; 
  • Classification of birationally bi-rigid Fano threefolds of codimension 2; 2016/02
    ANNOUNCEMENT INFO.; Higher dimensional algebraic geometry and around, Kobe-Kyoto, Kyoto University
    AUTHOR; Takuzo Okada
  • Birationally bi-rigid Fano threefolds of codimension 2; 2016/02
    ANNOUNCEMENT INFO.; Heilbronn Focused Research Workshop on Birational Geometry, University of Warwick, UK
    AUTHOR; Takuzo Okada
  • Non-rationality of del Pezzo fibrations by reduction modulo p; 2016/02
    ANNOUNCEMENT INFO.; Linfoot Seminar, University of Bristol
    AUTHOR; Takuzo Okada
  • Birationally rigid Pfaffian Fano 3-folds; 2015/11
    ANNOUNCEMENT INFO.; 
    AUTHOR; 
  • 3次元ファノ多様体の双有理幾何について; 2015/10
    ANNOUNCEMENT INFO.; 
    AUTHOR; 
  • Birational geometry of Fano 3-folds of codimension 2 and 3; 2015/09
    ANNOUNCEMENT INFO.; Algebraic Geometry Seminar, IBS Center for Geometry and Physics, Pohang, Korea
    AUTHOR; Takuzo Okada
  • Nonrational del Pezzo fibrations admitting an action of the Klein simple group; 2015/06
    ANNOUNCEMENT INFO.; Workshop on singular del Pezzo surfaces, University of Edinburgh, UK
    AUTHOR; Takuzo Okada
  • Birational geometry of Mori fibrations; 2015/04
    ANNOUNCEMENT INFO.; 2015 KAIST CMC Advanced School on Algebraic Geometry, KAIST, Daejeon, Korea
    AUTHOR; Takuzo Okada
  • 3次元4次超曲面の非有理次数について; 2015/02
    ANNOUNCEMENT INFO.; 
    AUTHOR; 
  • 3次元Qファノ重み付き完全交叉の双有理的森ファイバー構造について; 2014/12
    ANNOUNCEMENT INFO.; 
    AUTHOR; 
  • Birational geometry of Q-Fano 3-fold weighted complete intersections; 2014/05
    ANNOUNCEMENT INFO.; Landau-Ginzburg theory and Fano varieties (Gyeougju, Korea)
    AUTHOR; Takuzo Okada
  • On birationally tririgid Q-Fano threefolds; 2013/12
    ANNOUNCEMENT INFO.; 
    AUTHOR; 
  • Birationally tririgid Q-Fano threefolds; 2013/11
    ANNOUNCEMENT INFO.; 
    AUTHOR; 
  • On birationally tririgid Q-Fano threefolds; 2013/09
    ANNOUNCEMENT INFO.; 
    AUTHOR; Takuzo Okada
  • Introduction to rationality problem of quartic (and cubic) 3-folds; 2013/08
    ANNOUNCEMENT INFO.; Workshop in Algebraic Geometry in Sapporo (Hokkaido University)
    AUTHOR; Takuzo Okada
  • Birationally birigid Q-Fano threefolds; 2012/08
    ANNOUNCEMENT INFO.; Korea-Japan Joint Conference in Algebraic Geometry (Gunsan, Korea)
    AUTHOR; Takuzo Okada
  • Birational superrigidity and slope stability of Fano manifods; 2012/08
    ANNOUNCEMENT INFO.; 
    AUTHOR; 
  • Birationally birigid Q-Fano threefolds; 2012/06
    ANNOUNCEMENT INFO.; 
    AUTHOR; Takuzo Okada


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