Research Interests
periods: (p-adic) multiple zeta value, (p-adic) (multiple) polylogarithm,
(p-adic) iterated integration.
function field arithmetic: Carlitz (multiple) zeta value and polylogarithm.
analytic aspect of multiple zeta functions.
mixed Tate motive, motivic Galois group, motivic fundamental group.
(p-adic) Knizhnik-Zamolodchikov equation, Yang-Baxter equation, (braided) monoidal (tensor) category.
associators, Grothendieck-Teichmuller group, Lego-Teichmuller philosophy.
(quasi-triangular) (quasi-Hopf) quantum group, deformation quantization, Kashiwara-Vergne conjecture.
quantum topology: Kontsevich (knot) invariant, quantum (knot) invariant.
mould theory.
Research Experience
July 2019, Visitor at
Centre de recherches math\'{e}matiques , Montr\`{e}al , Canada.
August 2018- PRESENT , Professor at
Nagoya University , Nagoya, Japan.
February 2017-February 2018, JSPS Scientist for Joint International Research,
Institut de Rech\'{e}rche Math\'{e}matique Avanc\'{e}e ,
l'Universit\'{e} de Strasbourg, Strasbourg, France.
March-April 2015, Visiting Professor,
Institut de Rech\'{e}rche Math\'{e}matique Avancee ,
l'Universit\'{e} de Strasbourg, Strasbourg, France.
April 2013-March 2014, Member at
Max Planck Institute for Mathematics , Bonn, Germany.
January 2013-April 2013, Member at
Isaac Newton Institute for Mathematical Sciences , Cambridge, UK.
April 2010- July 2018, Associate Professor at
Nagoya University , Nagoya, Japan.
October 2007-September 2009,
JSPS Postdoctoral Fellowships for Research Abroad in
\'{E}cole Normale Sup\'{e}rieure , Paris, France.
July 2006, Visitor at
Tata Institute of Fundamental Research , Mumbai, and
Harish-Chandra Research Institute , Allahabad, India.
September 2004-August 2005, Member at
Institute for Advanced Study , Princeton, USA.
February 2004- March 2010, Assistant Professor (permanent one) at
Nagoya University , Nagoya, Japan.
September 2003. Ph.D from
RIMS , Kyoto university, Kyoto, Japan.
Awards
March. 2014,
Algebra Prize of Math. Soc. Japan .
February. 2007,
Inoue Research Award for Young Scientists .
September. 2004,
Takebe Prize of Math. Soc. Japan .
Paper
$p$-adic hypergeometric function related with $p$-adic multiple polylogarithms .
The stabilizer bitorsors of the module and algebra harmonic coproducts are equal ,
(with B.Enriquez ).
Notes on Kashiwara-Vergne and double shuffle Lie algebras
(with N.Komiyama ),
to appear in "Low Dimensional Topology and Number Theory"
Springer Proceedings in Mathematics & Statistics.
Kashiwara-Vergne and dihedral bigraded Lie algebras in mould theory,
(with N.Komiyama ),
Ann. Fac. Sci. Toulouse Math. (6) 32 (2023), no. 4, 655-725.
The $\ell$-adic hypergeometric function and associators,
Tunisian. J. Math 5-1 (2023), 1-29.
The Betti side of the double shuffle theory. III. Bitorsor structures,
(with B.Enriquez ),
Selecta Math. (N.S.) 29 (2023), issue no.2, article no. 27 (2023).
The Betti side of the double shuffle theory. II. Double shuffle relations for associators,
(with B.Enriquez ),
Selecta Math. (N.S.) 29 (2023), issue no.1, article no. 3 (2023).
On relations among multiple zeta values obtained in knot theory,
the Advanced Lectures in Mathematics (ALM) book series, Vol 49 Ch 5, pp-73-89, (2022), published jointly by International Press and by Higher Education Press of China, Advanced Lectures in Mathematics.
Analytic continuation of multiple polylogarithms in positive characteristic,
Tunisian. J. Math 4-3 (2022), 559-586.
The pentagon equation and the confluence relations,
Amer. J. Math. Vol 144, No 4, (2022) 873-894
The Betti side of the double shuffle theory. I. The harmonic coproduct,
(with B.Enriquez ), Selecta Math. (N.S.) 27 (2021), no. 5, Paper No. 79.
Galois action on knots II: proalgebraic string links and knots,
"Periods in Quantum Field Theory and Arithmetic"
Springer Proceedings in Mathematics & Statistics, vol 314 (2020), Springer, Cham 541-591.
$p$-adic multiple $L$-functions and cyclotomic multiple harmonic values,
(with D.Jarossay ),
International Journal of Number Theory Vol. 16, No. 02 (2020) 361-375.
A stabilizer interpretation of double shuffle Lie algebras
(with B.Enriquez ),
IMRN, 22 (2018), 6870-6907
On the coefficients of the Alekseev Torossian associator,
Journal of Algebra 506 (2018), 364-378.
Desingularization of multiple zeta-functions of generalized Hurwitz-Lerch type and evaluation of $p$-adic multiple $L$-functions at arbitrary integers,
(with Y.Komori ,
K.Matsumoto and
H.Tsumura ),
RIMS Kokyuroku bessatsu B68 (2017), 27-66.
Galois action on knots I: Action of the absolute Galois group,
Quantum Topol. 8 (2017), no. 2, 295-360.
Desingularization of complex multiple zeta-functions
(with Y.Komori ,
K.Matsumoto and
H.Tsumura ),
Amer. J. Math. 139, No 1 (2017), 147-173.
Fundamentals of p-adic multiple L-functions and evaluation of their special values
(with Y.Komori ,
K.Matsumoto and
H.Tsumura ),
Sel. Math. New Ser. 23, (2017), 39-100.
p-adic Eisenstein-Kronecker series for CM elliptic curves and the Kronecker limit formulas,
(with S.Kobayashi and
K.Bannai. ),
Nagoya Math. J. 219 (2015), 269-302.
Around associators ,
Automorphic forms and Galois representations, 2, 105-117, London Math.Soc. Lecture Note Ser. 415 (2014), Cambridge Univ. Press, Cambridge.
Geometric interpretation of double shuffle relation for multiple L-values,
Galois-Teichm\"{u}ller theory and Arithmetic Geometry,
Advanced Studies in Pure Math 63 (2012), 163-187.
Mixed Pentagon, octagon and Broadhurst duality equation,
(with B.Enriquez ),
Journal of Pure and Applied Algebra, Vol 216, Issue 4, (2012), 982-995.
Double shuffle relation for associators,
Annals of Mathematics, Vol. 174 (2011), No. 1, 341-360.
Pentagon and hexagon equations,
Annals of Mathematics, Vol. 171 (2010), No. 1, 545-556.
Algebraic cycles and motivic generic iterated integrals (with
A.Jafari ),
Mathematical Research Letters,(2007) Vol 14, No.6, 923-942.
Regularization and generalized double shuffle relations
for p-adic multiple zeta values, (with
A.Jafari ),
Compositio Math. Vol 143, (2007), 1089-1107.
p-adic multiple zeta values II -- tannakian interpretations,
Amer.J.Math, Vol 129, No 4, (2007),1105-1144.
p-adic multiple zeta values -- a pr\'{e}cis.
p-adic mathematical physics, 2nd international conference,
Amer.Inst.Phys, (2006), Conf. Proc. Vol 826, 222-236.
The double shuffle relations for p-adic multiple zeta values,
(with A.Besser ).
AMS Contemporary Math, Vol 416, (2006), 9-29.
Multiple zeta values and Grothendieck-Teichm\"{u}ller groups,
AMS Contemporary Math, Vol 416, (2006), 49-82.
p-adic multiple zeta values I -- p-adic multiple polylogarithms and
the p-adic KZ equation,
Inventiones Mathematicae, Volume 155, Number 2, 253-286, (2004).
Geometric and arithmetic subgroups of the Grothendieck-Teichm\"{u}ller
group,
Mathematical Research Letters, (2003) Volume 10, Number 1, 97-108.
The multiple zeta value algebra and the stable derivation algebra,
Publ. Res. Inst. Math. Sci. Vol 39. no 4. (2003). 695-720.
Research Surveys
Two stabilizers related to harmonic coproducts (Japanese),
RIMS-kokyuroku No 2238, Various Aspects of Multiple Zeta Values (2023), 168-172.
Mould theory and Kashiwara-Vergne Lie algebra (Japanese),
Topological studies around Riemann surfaces (2022) .
Betti counterpart of the double shuffle group (joint work with B. Enriquez) (Japanese),
Waseda University Number Theory Conference Report (2021) .
v
Kontsevish's eye, Lie graphs and the Alekseev-Torossian associator ,
26th Summer School on Number Theory (2018) , 351-361.
Associators and Kontsevich's eye ,
4th Algebraic Lie Theory and Representation Theory (ALTReT) proceedings (2018) , 29-40.
On profinite knots and Galois action there ,
RIMS-kokyuroku No. 1911, Intelligence of Low-dimensional Topology (2014),76-85,
problems ,135-136 .
Galois action on knots ,
Oberwolfach Reports, Report No. 42/2012, Low-Dimensional Topology and Number Theory, 2556-2557.
On the construction of $p$-adic multiple $L$-functions and their special values
(with H.Tsumura), (Japanese), report on 5th Multiple Zeta Values seminar, 2012.
Four groups related to associators ,
Report on Mathematische Arbeitstagung 24th June-1st July.2011.
Mixed pentagon equation and double shuffle relation ,
RIMS-kokyuroku No 1813, Various Aspects of Multiple Zeta Values (2012), 109-122.
The Grothendieck-Teichm\"{u}ller group, the double shuffle group and the motivic Galois group ,
RIMS-kokyuroku No.1714, Quantum Groups and quantum Topology (2010), 63-79.
The motivic Galois group, the Grothendieck-Teichm\"{u}ller group and the double
shuffle group ,
Oberwolfach Reports, Report No. 23/2010, Motives and Homotopy Theory of Schemes, 1406-1408.
The motivic Galois group, the Grothendieck-Teichm\"{u}ller group and the double shuffle group ,
54th Algebra Symposium Report (2009), 139-150.
Proof of double shuffle relations for p-adic multiple zeta values ,
RIMS-kokyuroku No.1523,
Automorphic representations, L-functions, and periods,
(2006), 12-24.
On motivic iterated integrals in generic positions
(joint work with A. Jafari),
RIMS-kokyuroku No.1521, Algebraic number theory and related topics,
(2006), 70-85.
Grothendieck-Teichmuller group (Japanese),
12th Summer School on Number theory (2004), 97-104.
Polylog and Frobenius (Japanese),
49th Algebra Symposium Report (2004), 72-85.
The double shuffle relations for p-adic multiple zeta values
(joint work with Amnon Besser)
(Japanese)
typewritten file available,
Waseda University Number Theory Conference Report (2004), 69-76.
A note on
weights of l-adic polylogarithms and p-adic polylogarithms ,
on 2004.2.29
Introduction to p-adic multiple zeta values (Japanese),
RIMS-kokyuroku No.1324,
Algebraic number theory and related topics , (2003), 33-46.
A note on
the explicit formula for a certain solution of the KZ-like differential equation , on 2002.12.30.
On defining equations of three variants of the Grothendieck-Teichm\"{u}ller group ,
RIMS-kokyuroku No.1267,
Communications in Arithmetic Fundamental Groups ,
(2002), 189-196.
The Multiple Zeta Value Algebra And The Stable Derivation Algebra (Japanese),
vRIMS-kokyuroku No. 1200,
Algebraic number theory and related topics ,
(2001), 137-148.
Lecture Notes
Knots and Grothendieck-Teichmuller group (Japanese),
Math for Industry Lecture note series , Vol 68, Kyushu. Univ, 2016.
Organised Workshops
Developments of multiple zeta values , Kyushu University (Fukuoka, Japan) and Kindai University (Osaka, Japan),
February 10-22, 2025.
Core Member,
France-Japan CNRS-RIMS project in Arithmetic and Homotopic Galois Theory (AHGT)
One Day Workshop on Arithmetic of Function Fields ,
Nagoya University, Nagoya, Japan, 19th. November. 2022.
Monthly meeting (ask me to participate).
Various aspects of multiple zeta values , RIMS, Kyoto, Japan, 18th-22nd. November. 2019.
proceedings .
Topology and Number Thoery seminar, Nagoya University, Nagoya, Japan, 25th-28th. June. 2019.
Mini-Workshop: Elliptic multiple zeta values and mixed elliptic motives ,
Nagoya University, Nagoya, Japan, 28th. July. 2018.
GRT, MZVs and associators , Les Diablerets, Switzerland, 26th. August-3rd September. 2016.
Various aspects of multiple zeta values , RIMS, Kyoto, Japan, 11th-14th. July. 2016.
proceedings .
Workshop on Polylogarithms, MZVs and Mahler measures , Tohoku University, Sendai, Japan, 28th-29th. March. 2016.
Zeta Functions of Several Variables and Applications , Nagoya University, Nagoya, Japan, 9th-13th. November. 2015.
GRT, MZVs and associators , Les Diables, Switzerland, 20th-29th. August. 2015.
Japan-Korea Number Theory Seminar 2011 ,
Nagoya University, Nagoya, Japan, 9th-12th. November. 2011.
Summer School; Multiple Zeta Values and Motives ,
Tohoku University, Sendai, Miyagi, Japan, 26th-28th. July. 2007.
Upcoming Talk
Algebraic Number Theory and Related Topics , RIMS, Kyoto, Japan, 11th-15th. December. 2023.
Talks
Arithmetic of hypergeometric functions and relted topics , Kanazawa, Japan, 23rd- 26nd. November. 2023.
Mini-course Lectures , Beijing International Center for Mathematical Research, Peking University, Beijing, China, 15th, 16th and 18th November, 2023.
Mapping class groups: pronilpotent and cohomological approaches , Les Diablerets, Switzerland, 17th- 22nd. September. 2023.
The 68-th Algebra Symposium , Nagoya university, Nagoya, Japan, 29th. August -1st. September. 2023.
NCTS Seminar on Number Theory , National Tsing Hua University, Hsinchu, Taiwan, 4th. May. 2023.
S\'{e}minnaire Quantique , IRMA, Strasbourg, France, 14th. March. 2023.
L-functions and Motives in Niseko 2022 , Niseko, Japan, 7th-12th. September. 2022.
Topological studies around Riemann surfaces , online conference, Japan, 5th-8th. September. 2022.
Various Aspects of Multiple Zeta Values , RIMS, Kyoto, Japan, 16th-20th. May. 2022.
S\'{e}minnaire Quantique , IRMA, Strasbourg, France, 27th. April. 2022.
Low dimensional topology and number theory ,
IMI Auditorium (413 Rm), 4F West 1st Bd, Kyushu University (Ito Campus), Fukuoka, Japan, 15th-18th. March. 2022.
Johnson homomorphisms and related topics , online seminar, 12th. January. 2022.
Kyushu university MZV seminar (the extended version) , Kyushu university, Hakata, Japan, 22cd-23rd. November. 2021.
Japan Europe Number Theory Exchange Seminar , online seminar, 1st. June. 2021.
Waseda number theory conference , online conference in
Waseda University, Tokyo, Japan, 22nd-23rd. March. 2021.
NCTS Seminar on Number Theory , online seminar in
National Tsing Hua University, Hsinchu, Taiwan, 11th. December, 2020.
The 15th Kagoshima Algebra-Analysis-Geometry Seminar ,
Kagoshima University, Kagoshima, Japan, February 12-14, 2020.
Expansions, Lie Algebras, and Invariants ,
CRM, Montreal, Canada, 1st-31st. July. 2019.
Workshop: Multiple zeta values and related topics ,
Kyushu University, Hakata, Japan, 10th-12th. June. 2019.
Workshop: Johnson homomorphisms and related topics 2019 ,
Tokyo University, Tokyo, Japan, 13th-17th. May. 2019.
Kansai Multiple Zeta Values Workshop ,
Osaka University of Health and Sports Sciences, Osaka, Japan, 11th. May. 2019.
Algebra, Combination and Number Theory seminar ,
School of Mathematical Sciences, Peking University, Beijing, China, 3rd. May. 2019.
NCTS Seminar on Number Theory ,
National Tsing Hua University, Hsinchu, Taiwan, 10th. April, 2019.
Spring Central and Western Joint Sectional Meeting of the AMS ,
Special Session on Arithmetic and Transcendence of Special Functions and Special Values ,
University of Hawaii at Manoa, Honolulu, USA, 22nd-24th. March. 2019.
Low dimensional topology and number theory XI ,
Osaka University, Toyonaka Campus, Japan, 11th-14th. March. 2019.
Arithmetic and Algebraic Geometry 2019 ,
Tokyo University, Tokyo, Japan, 21st-25th. January. 2019.
Seminar on Analytic Number Thoery ,
Nagoya University, Nagoya, Japan, 4th. October. 2018.
26th Number Theory Summer School ,
Sea Park Irako, Tahara, Aichi, Japan, 10th-14th. September. 2018.
International Workshop on Arithmetic Geometry and Quantum Field Theory ,
KIAS, Seoul, South Korea, 13th-17th. August. 2018.
Taiwan-Japan Joint Workshop on Multiple Zeta Values ,
National Taiwan University, Taipei, Taiwan, 2nd-5th. August. 2018.
Algebraic Lie Theory and Representation Theory (ALTReT) 2018 ,
Sophia University Seminar House, Karuizawa, Japan, 25th-28th. May. 2018.
Poisson geometry of moduli spaces, associators and quantum field theory ,
Simons Center for Geometry and Physics, Stony Brook, USA, April 30-June 29, 2018.
S\'{e}minnaire Quantique ,
IRMA, Strasbourg, France, 29th. January. 2018.
Periods and Regulators ,
Hausdorff Research Institute for Mathematics, Bonn, Germany, 15-19. January. 2018.
Combinatoire et Th\'{e}orie de Nombres ,
Institut Camille Jordan, Universit\'{e} Claude Bernard Lyon 1, Lyon, France, 21st. November. 2017.
S\'{e}minnaire de G\'{e}ometri\'{e} et Quantification ,
Institut Henri Poincar\'{e}, Paris, France, 25th. September. 2017.
S\'{e}minnaire et Groupe de travail de GAAO ,
Universit\'{e} de Blaise Pascal, Laboratoire de Math\'{e}matique, Clermont-Ferrand, France, 2nd. June. 2017.
S\'{e}minaire tournant de th\'{e}orie des nombres ,
l'Institut Fourier, Grenoble, France, 23rd. May. 2017.
S\'{e}minnaire Quantique ,
IRMA, Strasbourg, France, 20th. March. 2017.
Geometry of Moduli Space
of Low Dimensional Manifolds ,
RIMS, Kyoto, Japan, 12th-16th. December. 2016.
Workshop on Grothendieck-Teichm\"{u}ller Theories ,
Chern Institute of Mathematics, Nankai University, Tianjin, China, July 24 - 30, 2016.
Low dimensional topology and number theory VIII ,
IMAQ Seminar Room, Innovation Plaza, Fukuoka, Japan, March 22 - 25, 2016.
Algebraic Number Theory and Related Topics , RIMS, Kyoto, Japan, 30th. November-4th. December. 2015.
Zeta Functions of Several Variables and Applications ,
Nagoya University, Nagoya, Japan, 9th-13th. September. 2015.
GRT, MZVs and associators , Les Diables, Switzerland, 20th-29th. August. 2015.
Kansai Multiple Zeta Values Workshop ,
Kyoto Sangyo University, Kyoto, Japan, 16th. May. 2015.
S\'{e}minnaire Groupes de Lie et espaces de modules ,
Section de math\'{e}matiques, Universit\'{e} de Gen\`{e}ve, Geneva, Switzerland, 2nd. April. 2015.
S\'{e}minnaire Quantique ,
IRMA, Strasbourg, France, 30th. March. 2015.
2015 TIMS Winter School on Number Theory ,
Taida Institute for Mathematical Science, National Taiwan University, Taipei, Taiwan, 9th-13th. February. 2015.
PMI
Number Theory Seminar ,
Department of Mathematics, POSTECH, Pohang, South Korea, 5th. January. 2015.
Intensive Lectures , Tohoku University, Sendai, Japan, 18th-21st. November. 2014.
Colloquium , Tohoku University, Sendai, Japan, 17th. November. 2014.
Tresses et Arithmetique ,
Centre International de Rencontres Math\'{e}matiques,
Luminy, France, 13th-17th. October. 2014.
Homotopical Algebra, Operads and Grothendieck-Teichm\"{u}ller groups ,
Universit\'{e} Nice Sophia Antipolis, Laboratoire J.A. Dieudonn\'{e},
Nice, France, 9th-12th. September. 2014.
Intelligence of Low-dimensional Topology ,
RIMS, Kyoto, Japan, 21st-24th. May. 2014.
Seminar on Analytic Number Theory ,
Nagoya University, Nagoya, Japan, 8th. April. 2014.
MSJ Spring Meeting 2014 ,
Gakushuin University, Tokyo, Japan, 15th-18th. March. 2014.
S\'{e}minnaire d'alg\`{e}bre ,
Institut Camille Jordan, Universit\'{e} Claude Bernard Lyon 1, Lyon, France, 12th December. 2013.
Japanese Turkish Joint Geometry Meeting ,
Galatasaray University, \.{I}stanbul, Turkey, 21st-24th. November. 2013.
General Mathematics Seminar ,
University of Luxembourg, Luxembourg, Luxembourg, 22nd October. 2013.
Joint UAM-ICMAT Seminar, Algebra and Combinatorics ,
Instituto de Ciencias Matem\'{a}ticas Universidad Aut\'{o}noma de Madrid,
Madrid, Spain, 4th October, 2013.
Exploratory Workshop, New Approaches To Multiple Zeta Values ,
Instituto de Ciencias Matem\'{a}ticas Universidad Aut\'{o}noma de Madrid,
Madrid, Spain, 30th September-2nd October, 2013.
Motivic Galois Groups ,
Alfr\'{e}d R\'{e}nyi Institute of Mathematics, Budapest, Hungary, 2nd-6th. September. 2013.
Seminar on Algebra, Geometry and Physics ,
Max Planck Institute for Mathematics, Bonn, Germany, 16th. July. 2013.
MPI-Oberseminar ,
Max Planck Institute for Mathematics, Bonn, Germany, 13th. June. 2013.
Higher Structures in Topology and Number Theory ,
Clay Mathematics Institute workshop,
Mathematical Institute, University of Oxford, Oxford, UK,
15th-16th. April. 2013.
Grothendieck-Teichm\"{u}ller theory and Multiple Zeta Values of
Grothendieck-Teichm\"{u}ller Groups, Deformation and Operads ,
Isaac Newton Institute for Mathematical Sciences, Cambridge, UK,
8th-12th. April. 2013.
Lecture of
Grothendieck-Teichm\"{u}ller Groups, Deformation and Operads ,
Isaac Newton Institute for Mathematical Sciences, Cambridge, UK,
13th. February. 2013.
Introductory Workshop of
Grothendieck-Teichm\"{u}ller Groups, Deformation and Operads ,
Isaac Newton Institute for Mathematical Sciences, Cambridge, UK,
8th-10th. January. 2013.
Tuesday Seminar on Topology ,
Tokyo University, Tokyo, Japan, 6th. November. 2012.
Low-Dimensional Topology and Number Theory ,
Mathematisches Forschungsinstitut Oberwolfach, Oberwolfach, Germany,
26th. August.-1st. September. 2012.
Periods and Motives , A Modern Perspective on Renormalization,
Instituto de Ciencias Matem\'{a}ticas Universidad Aut\'{o}noma de Madrid,
Madrid, Spain, 2nd-6th. July. 2012.
String seminar ,
Nagoya University, Nagoya, Japan, 28th. June. 2012.
Polylogarithmes en alg\`{e}bre et en topologie ,
Laboratoire J.A. Dieudonn\'{e}, Nice, France, 14th-16th. June. 2012.
Colloque \`{a} l'occasion des 80 ans de Pierre Cartier,
Dialogues autour de l'alg\`{e}bre, la g\'{e}omtri\'{e} et les fonctions multiz\^{e}tas ,
IHES, Paris, France, 11th-12th. June. 2012.
Colloquium in Mathematics , Kyushu University, Hakata, Japan, 26th. April. 2012.
Intensive Lectures , Kyushu University, Hakata, Japan, 23rd-27th. April. 2012.
Low dimensional topology and number theory IV ,
Kyushu University, Fukuoka, JAPAN, 12th-15th March. 2012.
5th Multiple Zeta Values seminar ,
Kyushu University, Hakata, Japan, 27th-29th. January. 2012.
Algebra seminar ,
Tohoku University, Sendai, Japan, 15th. December. 2011.
Intensive Lectures ,
Tokyo University, Tokyo, Japan, 14th-18th. November. 2011.
Automorphic forms and Galois representations ,
Durham University, Durham, UK, 18th-28th July. 2011.
Mathematische Arbeitstagung 2011 ,
Universit\"{a}t Bonn and the Max-Planck-Institute for Mathematics,
Bonn, Germany, 24th-30th June. 2011.
The motivic fundamental group ,
Lorentz Center, Leiden, Netherlands, 23rd-27th May. 2011.
Workshop on L-functions ,
Kyushu University, Fukuoka, Japan, 21st-23rd April.2011.
Low dimensional topology and number theory III ,
Nishijin Plaza, Fukuoka, JAPAN, 14th-17th March. 2011.
S\'{e}minnaire Quantique ,
IRMA, Strasbourg, France, 6th. December. 2010.
Development of Galois-Teichm\"{u}ller Theory and Anabelian Geometry ,
RIMS, Kyoto, Japan, 25th-30th October. 2010.
Various Aspects of Multiple Zeta Values ,
RIMS, Kyoto, Japan, 6th-9th September. 2010.
Arithmetic Geometry Workshop 2010 ,
Naha, Okinawa, Japan, 2nd-6th August. 2010.
Des associateurs de Drinfeld \`{a} ceux de
Kashiwara-Vergne et lien avec les invariants
de noeuds g\'{e}n\'{e}ralis\'{e}s ,
l'Universit\'{e} Montpellier 2, Montpellier, France,
3rd-4th June. 2010.
Motives and Homotopy Theory of Schemes ,
Mathematisches Forschungsinstitut Oberwolfach,
Oberwolfach, Germany, 16th-22nd May, 2010.
Quantum Groups and Quantum Topology ,
RIMS, Kyoto, Japan, 19th-20th. April. 2010.
S\'{e}minnaire Quantique ,
IRMA, Strasbourg, France, 22nd. February. 2010.
Analytic Number Theory Seminar ,
Nagoya University, Nagoya, Japan, 27th. January. 2010.
Arithmetic Geometry Seminar ,
Nagoya University, Nagoya, Japan, 26th. January. 2010.
$p$-adic Special Functions and Arithmetic Geometry ,
Yutomorikurabu, Zaoh, Japan, 28th-31st. October. 2009.
Anabelian Geometry ,
Isaac Newton Institute for Mathematical Sciences, Cambridge, UK,
24th-28th. August 2009.
54th Algebra Symposium ,
Meiji University, Tokyo, Japan,
3rd-6th. August. 2009.
S\'{e}minnaire The\'{o}rie de Galois Dif\'{e}rentielle ,
Laboratoire Paul Painlev\'{e},
UFR de Math\'{e}matiques, Universite de Lille 1, Lille, France,
16th. March. 2009.
Autour des travaux d'A. Grothendieck ,
l'Universit\'{e} Montpellier 2, Montpellier, France,
21st-23rd. January. 2009.
S\'{e}minnaire Quantique ,
IRMA, Strasbourg, France, 8th. December. 2008.
S\'{e}minnaire de G\'{e}om\'{e}trie et Dynamique ,
Groupe de travail de Renormalisation -Supersym\'{e}trie,
math\'{e}matiques \`{a} Jussieu; Jussieu / Chevaleret, Paris, France,
27th. November. 2008.
S\'{e}minnaire d'alg\`{e}bre ,
Institut Camille Jordan, Universit\'{e} Claude Bernard Lyon 1,
Lyon, France, 20th. November. 2008.
S\'{e}minnaire Groupes de Lie et espaces de modules ,
Section de math\'{e}matiques, Universit\'{e} de Gen\`{e}ve,
Geneva, Switzerland, 14th. October. 2008.
Nottingham Number theory seminar ,
School of Mathematical Sciences, University of Nottingham, Nottingham, UK,
4th. June. 2008.
S\'{e}minnaire Quantique ,
IRMA, Strasbourg, France, 17th. March. 2008.
S\'{e}minnaire Polylogarithmes et Multiz\^{e}ta ,
math\'{e}matiques \`{a} Jussieu; Jussieu / Chevaleret, Paris, France,
10th. March. 2008.
Number theory lunch seminar,
Max Planck Institute for Mathematics, Bonn, Germany, 19th. December. 2007.
G\"{a}ste und G\"{a}stvortage im Wintersemester 2007/08 ,
Universitat Regensburg, Regensburg, Germany, 14th. December. 2007.
Multiple Polylogarithms and Moduli Spaces Day ,
Durham University, Durham, UK,
5th. December. 2007.
GTEM Workshop Arithmetic of Curves and Covers ,
UFR de Math\'{e}matiques, Universite de Lille 1, Lille, France,
21st-23rd. November. 2007.
Groupe de Travail de G\'{e}om\'{e}trie Arithm\'{e}tique ,
IRMAR, Universite de Rennes 1, Rennes, France,
13rd. November. 2007.
Seminar ,
Padova university ,
Padova, Italy, 19th. October. 2007.
Seminar ,
Padova university ,
Padova, Italy, 16th. October. 2007.
Arithmetic Algebraic Geometry Conference ,
Cetraro, Italy, 7th-13th, October. 2007.
slides available .
Arithmetic Algebraic Geometry ,
Adam Mickiewicz University, Poznan, Poland,
3rd-7th, September. 2007.
Summer School; Multiple Zeta Values and Motives ,
Tohoku University, Sendai, Miyagi, Japan, 26th-28th.July. 2007.
Analytic Number Theory Seminar,
Nagoya University, Nagoya, Japan, 4th. April. 2007.
Motives, related topics, applications ,
Hiroshima University, Hiroshima, Japan, 5th-9th. March. 2007.
slides available .
Colloquium,
Nagoya university, Nagoya, Japan, 21st. February, 2007.
Conference on zeta for younger researchers ,
Nagoya University, Nagoya, Japan, 17th-18th. February. 2007.
UK-Japan Winter School, Number Theory ,
University of Cambridge, Centre for Mathematical Sciences,
Cambridge, UK, 7th-10th. January 2007.
Arithmetic Galois Theory and Related Moduli Spaces ,
RIMS, Kyoto University, Kyoto, Japan, 23rd-27th and 30th-31st. October. 2006.
slides available .
Seminar,
Harish-Chandra Research Institute , Allahabad,
India, 4th. August. 2006.
Number Theory Seminar, TIFR, Mumbai, India, 26th. July. 2006.
Special Mathematics Colloquium,
TIFR , Mumbai, India, 19th. July. 2006.
Motives and Periods ,
University of British Columbia, Vancouver, Canada,
5th-12th. June. 2006.
Red Lodge Conference ,
Red Lodge, Montana, USA, 3rd-7th. April. 2006.
slides available .
Number Theory Seminar ,
Nagoya university, Nagoya, Japan, 22nd. February, 2006.
Automorphic representations, L-functions, and periods ,
RIMS, Kyoto, Japan, 23rd-27th. January, 2006,
slides available .
Japan-Korea Joint Number Theory Seminar,
KAIST ,
Daejeon, South Korea, 5th-8th, January, 2006.
Workshop on Motives , Tokyo University, Tokyo, Japan,
19th-22nd, December. 2005,
slides available .
Algebraic Number Theory and Related Topics ,
RIMS, Kyoto, Japan, 5th-9th. December. 2005,
slides available .
Hodge Theory Seminar , Duke University, Durham, USA,
26th. October. 2005.
JHU Number Theory Seminar , Johns Hopkins University, Baltimore, USA,
21th. October. 2005.
2nd International Conference on p-adic Mathematical Physics ,
Institute of Physics ,
Belgrade, Serbia and Montenegro, 15th-21th, September, 2005,
slides available .
Member seminar,
Simonyi Hall, IAS, Princeton, USA, 7th, March, 2005.
Algebra Seminar , University of Pennsylvania, Philadelphia, USA,
14th, February, 2005.
Short Talks by Postdoctoral Members,
Simonyi Hall, IAS, Princeton, USA, 23rd-29th, September, 2004.
Summer School on Number theory ,
Fukuyama, Japan, 23rd-27th, August, 2004.
slides available .
49th Algebra Symposium , Sendai International Center,
Sendai, Japan, 2nd-5th, August, 2004.
slides available .
Algebra Seminar , Hiroshima University,
Hiroshima, Japan, 31st. May. 2004.
Underground Seminar , Nagoya University,
Nagoya, Japan, 26th. May. 2004.
Conference on Number Theory , Waseda University,
Tokyo, Japan, 17th-19th. March. 2004.
Kagawa seminar, Kagawa University,
Kagawa, Japan, 20th-21st. December. 2003.
Okayama little workshop , Okayama University, Okayama, Japan,
November. 13rd-14th. 2003.
Noncommutative aspects of number theory ,
University of Durham, Durham, UK, 28th. August - 5th. September. 2003,
slides available .
Padova University, Padova, Italy, 2nd - 3rd. July. 2003.
Journee Groupes Fondamentaux et Polylogs ,
Universite de Paris 6, Institut Mathematique de Jussieu,
Paris, France, 20th. June, 2003.
RIMS Number Theory Seminar,
A short survey talk on Monster, especially on Conway-Norton conjecture,
Kyoto, Japan, 29th. May. 2003.
UC Berkeley Number Theory Seminar ,
University of California, Berkeley, USA,
14th. May. 2003 .
Arithmetic application of moduli degeneration ,
University of California, Irvine, USA,
7th-10th. May. 2003 .
Tokyo University Monthly Seminar on Number Theory of Modular Forms ,
Tokyo University, Tokyo, Japan, 26th. April. 2003.
p-adic methods in number theory , Nagoya University, Nagoya, Japan,
9th-10th. April. 2003.
Conference on Primes and Knots (
JAMI-conference ),
Japan-U.S. Mathematics Institute, Johns Hopkins University, Baltimore, USA,
6th-16th. March. 2003.
Ben-Gurion University Number Theory and Algebraic Geometry Seminar ,
Beer Sheva, Israel,
26th. February. 2003 .
Algebraic Geometry seminar,
Einstein Institute , Hebrew University, Jerusalem, Israel,
20th. February. 2003.
RIMS Number Theory Seminar, Kyoto, Japan, 10th. February. 2003.
Algebraic Number Theory and Related Topics ,
RIMS, Kyoto, Japan, 2nd-6th. December. 2002.
Waseda University Number Theory seminar , Tokyo, Japan,
25th. October. 2002.
Number Theory Workshop ,
Hiroshima University, Hiroshima, Japan,
29th-31th. July. 2002.
Workshop on Homotopy Theory of Algebraic Varieties and the Milnor Conjecture ,
Yatsugatake Izumigo, Japan, 5th-8th. July. 2002.
RIMS Number Theory seminar, RIMS, Kyoto, Japan, 22th. April. 2002.
Arithmetic Aspects of Fundamental Groups ,
EURESCO Conference, Acquafredda di Maratea (near Naples), Italy,
1st-6th. September. 2001.
Various aspects on multiple zeta values ,
RIMS, Kyoto, Japan, 4th-6th. June. 2001.
Workshop on Hodge theory, Galois theory, moduli and arithmetic geometry ,
Kyoto University, Graduate School of Human and Environmental Studies
Room No. G226, Kyoto, Japan,
21st-24th. May. 2001.
$\pi_1$ festival ,
Tokyo Metropolitan University, Tokyo, Japan,
14th-15th. March. 2001.
RIMS Number Theory seminar,Kyoto, Japan, 19th. February. 2001.
Algebraic Number Theory and Related Topics ,
RIMS, Kyoto, Japan, 18th-22th. December. 2000.
Kyushu University Multiple Zeta Values Seminar,
Hakata, Japan, 6th-7th. November. 2000.
Tokyo Metropolitan University Number Theory Seminar ,
Tokyo, Japan, 24th-26th. July. 2000.
slides available .
Computation Tables
Table of Multiple Zeta Values up to Weight 12
Drinfel'd Associator up to degree 4
The Fundamental Solution of KZ equation up to degree 4
Community Service
Toyota Nishi high school, Toyota, Japan, 9th November. 2023.
Koyo high school, Nagoya, Japan, 5th November. 2020.
Suugaku Sansaku ,
NHK cultural center, Nagoya, Japan, 23rd February. 2019.
Suugaku Sansaku ,
NHK cultural center, Nagoya, Japan, 21th July. 2018.
Students
the God (PhD, 2020),
Comy (PhD, 2021),
Matsupedia ,
Anzawa ,
Shinohara ,
Katayama .
Address:
Graduate School of Mathematics ,
Nagoya University , Chikusa-ku, Furo-cho, Nagoya 464-8602 Japan
Tel : +81-52-789-2418
Fax : +81-52-789-2408
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