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Books/Lecture notes

  1. Motivic integration, the McKay correspondence and wild ramification, in preparation, version:2021-11-11.

  2. A Glimpse into University Math Through Games, Kyoritsu Shuppan (Dec. 2018).

  3. Compoutational Algebraic Geometry with Macaulay2, (English translation of Japanese lecture notes written in Oct. 2012).

  4. Computing Invariant Rings with Macaulay2. (Nov. 2024)

Papers

My papers on Google Scholar

  1. Orbifold pseudo-effective cones of toric stacks,
    joint work with Ratko Darda,
    arXiv:2508.20434.

  2. Counting torsors for wild abelian groups,
    joint work with Ratko Darda,
    arXiv:2505.12784.

  3. The Batyrev-Manin conjecture for DM stacks II,
    joint work with Ratko Darda,
    arXiv:2502.07157.

  4. Quotient singularities by permutation actions are canonical,
    arXiv:2408.13504, to appear in Épijournal de Géométrie Algébrique.

  5. Motivic versions of mass formulas by Krasner, Serre and Bhargava,
    Forum of Mathematics, Sigma , Volume 13 , 2025 , e148, (Sep. 2025).
    DOI: https://doi.org/10.1017/fms.2025.10099

  6. The Manin conjecture for toric stacks,
    joint work with Ratko Darda,
    arXiv:2311.02012.

  7. Higher Jacobian ideals, contact equivalence and motivic zeta functions,
    joint work with Quy Thuong Lê,
    Revista Matemática Iberoamericana, Volume 41, no. 3, 1057–1080, (Apr. 2025, published online Oct. 2024).
    DOI: https://doi.org/10.4171/rmi/1516

  8. Non-commutative resolutions of linearly reductive quotient singularities,
    joint work with Christian Liedtke,
    The Quarterly Journal of Mathematics, Volume 75, Issue 3, 969–985, (Jun. 2024).
    DOI: https://doi.org/10.1093/qmath/haae033

  9. F-blowups and essential divisors for toric varieties,
    joint work with Enrique Chávez-Martínez and Daniel Duarte,
    Journal of the Mathematical Society of Japan, Vol. 77, No. 4 (Oct. 2025).
    DOI: https://doi.org/10.2969/jmsj/93529352

  10. Log centres of noncommutative crepant resolutions are Kawamata log terminal: remarks on a paper of Stafford and Van den Bergh,
    joint work with Colin Ingalls,
    Contemporary Mathematics 801, Recent Advances in Noncommutative Algebra and Geometry, 143-154, (Jul. 2024).
    Webpage of the entire volume

  11. Quantitative inverse Galois problem for semicommutative finite group schemes,
    joint work with Ratko Darda,
    Journal de théorie des nombres de Bordeaux, Vol. 37, no. 1, 105-123, (Jun. 2025).
    DOI: https://doi.org/10.5802/jtnb.1314

  12. The Batyrev-Manin conjecture for DM stacks,
    joint work with Ratko Darda,
    Journal of the European Mathematical Society, published online first, (Jul. 2024).
    DOI: https://doi.org/10.4171/jems/1510

  13. Torsors for finite group schemes of bounded height,
    joint work with Ratko Darda,
    Journal of London Mathematical Society, Vol. 108, Issue 3, 1275-1331, (Sep. 2023).
    DOI: https://doi.org/10.1112/jlms.12780

  14. The isomorphism problem of projective schemes and related algorithmic problems,
    International Journal of Algebra and Computation, Vol. 33, No. 5, 893-926, (Jun. 2023).
    DOI: https://doi.org/10.1142/S021819672350039X

  15. Open problems in the wild McKay correspondence and related fields,
    Advanced Studies in Pure Mathematics, Vol. 88 "McKay correspondence, Mutation and related topics," 279-303, (Apr. 2023).
    DOI: https://doi.org/10.2969/aspm/08810279

  16. On the behavior of stringy motives under Galois quasi-étale covers,
    joint work with Javier Carvajal-Rojas,
    Documenta Mathematica, Vol. 30, No. 3, 709–751, (Jun. 2025).
    DOI: https://doi.org/10.4171/dm/1012

  17. The wild McKay correspondence for cyclic groups of prime power order,
    joint work with Mahito Tanno,
    Illinois Journal os Mathematics, 65, 619-654, (Sep. 2021).
    DOI: https://doi.org/10.1215/00192082-9402078

  18. Moduli of formal torsors II,
    joint work with Fabio Tonini,
    Annales l'Institut Fourier, Vo. 73, No. 2, 511-558, (May 2023).
    DOI: https://doi.org/10.5802/aif.3533

  19. Motivic integration over wild Deligne-Mumford stacks,
    Algebraic Geometry, 11(2), 178–255, (Mar. 2024).
    DOI: https://doi.org/10.14231/AG-2024-007

  20. The wild McKay correspondence via motivic integration,
    Sugaku, 70, 159-183 (Apr. 2018)
    (in Japanese. The original Japanese title is モチーフ積分による野性マッカイ対応.)
    DOI: https://doi.org/10.11429/sugaku.0702159, English version in Sugaku Expositions

  21. Notes on the motivic McKay correspondence for the group scheme \(\alpha_p \),
    joint work with Fabio Tonini,
    Singularities — Kagoshima 2017; Proceedings of the 5th Franco-Japanese-Vietnamese Symposium on Singularities, 215-233 (Jul. 2020).
    DOI: https://doi.org/10.1142/9789811206030_0011

  22. Discrepancies of \(p\)-cyclic quotient varieties,
    Journal of Mathematical Sciences, the University of Tokyo, 26, 1-14 (Mar. 2019).
    Journal article page

  23. Moduli of formal torsors,
    joint work with Fabio Tonini,
    Journal of Algebraic Geometry, 29, 753-801 (Jun. 2020).
    DOI: https://doi.org/10.1090/jag/771

  24. Motivic Serre invariants modulo the square of \(\mathbb{L}-1\),
    Proceedings of the American Mathematical Society, 146, 547-554 (Feb. 2018).
    DOI: https://doi.org/10.1090/proc/13780

  25. Vojta’s conjecture, singularities and multiplier-type ideals,
    Kodai Mathematical Journal, 41, 566-578 (Oct. 2018).
    DOI: https://doi.org/10.2996/kmj/1540951254 (this is a shortened version of the preprint "Vojta's conjecture for singular varieties", arXiv:1610.03593).

  26. Mass formulas for local Galois representations and quotient singularities II: dualities and resolution of singularities,
    joint work with Melanie Matchett Wood
    Algebra & Number Theory, 11, 817-840 (Jun. 2017).
    DOI: https://doi.org/10.2140/ant.2017.11.817 (Errata to this paper is to appear on the ANT website. Here are supplementary notes.)

  27. Manin's conjecture vs. Malle's conjecture,
    arXiv:1505.04555.

  28. The wild McKay correspondence and \(p\)-adic measures,
    Journal of the European Mathematical Society, 19, 3709-3734 (Nov. 2017). DOI: https://doi.org/10.4171/jems/751

  29. Densities of rational points and number fields,
    arXiv:1408.3912.

  30. Wilder McKay correspondences,
    Nagoya Mathematical Journal, 221, 111-164 (Mar. 2016).
    DOI: https://doi.org/10.1017/nmj.2016.3

  31. Mass formulas for local Galois representations and quotient singularities I: a comparison of counting functions,
    joint work with Melanie Matchett Wood,
    International Mathematics Research Notices, 2015, 12590–12619 (Jan. 2015).
    DOI: https://doi.org/10.1093/imrn/rnv074

  32. Toward motivic integration over wild Deligne-Mumford stacks,
    Higher dimensional algebraic geometry, Advanced Studies in Pure Mathematics, 74, 407-437 (2017).
    DOI: https://doi.org/10.2969/aspm/07410407

  33. Higher Semple-Nash blowups and F-blowups,
    Clay Mathematics Proceedings, Vol. 20, 327-340 (Jan., 2014). PDF of the entire volueme

  34. The p-cyclic McKay correspondence via motivic integration,
    Compositio Mathematica, 150, 1125-1168 (Jul., 2014).
    DOI: https://doi.org/10.1112/S0010437X13007781

  35. Pure subrings of regular local rings, endomorphism rings and Frobenius morphisms,
    Journal of Algebra, 370, 15-31 (Nov., 2012).
    DOI: https://doi.org/10.1016/j.jalgebra.2012.07.027

  36. F-blowups of normal surface singularities,
    joint work with Nobuo Hara and Tadakazu Sawada,
    Algebra & Number Theory 7-3, 733--763 (Aug., 2013).
    DOI: http://dx.doi.org/10.2140/ant.2013.7.733

  37. Frobenius morphisms of noncommutative blowups,
    Singularities in Geometry and Topology, Strasbourg 2009 (IRMA Lectures in Mathematics and Theoretical Physics 20), 269-283 (Dec., 2012).
    DOI: https://doi.org/10.4171/118-1/14

  38. Universal flattening of Frobenius,
    American Journal of Mathematics, 134, 349-378 (Apr., 2012).
    DOI: https://doi.org/10.1353/ajm.2012.0014, JSTOR article page

  39. Noncommutative resolution, F-blowups and D-modules,
    joint work with Yukinobu Toda,
    Advances in Mathematics, 222, 318-330 (Sep., 2009).
    DOI: https://doi.org/10.1016/j.aim.2009.04.004

  40. On monotonicity of F-blowup sequences,
    Illinois Journal of Mathematics, 53, 101-110 (May, 2009).
    DOI: https://doi.org/10.1215/ijm/1264170841

  41. Non-adic formal schemes,
    International Mathematics Research Notices, 2009, 2417-2475 (Feb., 2009).
    DOI: https://doi.org/10.1093/imrn/rnp021

  42. Flag higher Nash blowups,
    Communications in Algebra, 37, 1001-1015 (Mar., 2009).
    DOI: https://doi.org/10.1080/00927870802279022

  43. Higher Nash blowups,
    Compositio Mathematica, 143, 1493-1510 (Nov., 2007).
    DOI: https://doi.org/10.1112/S0010437X0700276X

  44. Motivic integration over Deligne-Mumford stacks,
    Advances in Mathematics, 207, 707-761 (Dec., 2006).
    DOI: https://doi.org/10.1016/j.aim.2006.01.004

  45. Jet schemes, log discrepancies and inversion of adjunction,
    joint work with L. Ein and M. Mustata,
    Inventiones Mathematicae, 153, 519-535, (Sep., 2003).
    DOI: https://doi.org/10.1007/s00222-003-0298-3

  46. Dimensions of jet schemes of log singularities,
    American Journal of Mathematics, 125, 1137-1145 (Oct., 2003).
    DOI: https://doi.org/10.1353/ajm.2003.0037, JSTOR article page

  47. Twisted jets, motivic measures and orbifold cohomology,
    Compositio Mathematica, 140, 396-422 (Mar., 2004).
    DOI: https://doi.org/10.1112/S0010437X03000368

Last update: September 15, 2025