List of publication
 arXiv
 preprints
 Strong stability of 3wise $t$intersecting families
arXiv (2023/04/26)
 Counting cliques in a random graph (with Taro Sakurai)
arXiv (2022/8/15)
 The maximum measure of nontrivial 3wise intersecting families
arXiv (2022/4/1, 2023/04/30)
 Solving linear equations in a vector space over a finite field II (with Masato Mimura)
pdf (2020/8/31)
 Avoiding a star of threeterm arithmetic progressions (with Masato Mimura).
arXiv (2019/9/23)
 Avoiding a shape, and the slice rank method for a system of equations
(with Masato Mimura).
arXiv (2019/9/23)
 published articles
 Nontrivial 3wise intersecting uniform families
arXiv
(2022/10/28, 2023/04/27)
Discrete Math. 346 (2023), no. 5, Paper No. 113368, 9 pp.
 The maximum measure of 3wise tintersecting families
arXiv (2021/12/17, 2023/03/02)
European J. Combin. 110 (2023), Paper No. 103703, 17 pp.
 Application of hypergraph Hoffman's bound to intersecting families
arXiv (2021/12/16)
Algebraic Combinatorics, Volume 5 (2022) no. 3, pp. 537557.
 Solving linear equations in a vector space over a finite field (with Masato Mimura)
Discrete Mathematics, 344 (2021) no. 12, 112603.
pdf (2020/8/31, 2021/9/6 updated)
 Extending Muirhead's inequality (with Mitsuo Kato, Masashi Kosuda)
Graphs and Combinatorics (2021) pdf (2020/9/30, 2021/9/6 updated)
 When are stars the largest cross intersecting families?
Discrete Math. 343 (2020), no. 2, 111645, 14 pp.
arXiv (2018/10/17)

AKtype stability theorems on cross tintersecting families
European J. Combin. 82 (2019), 102993, 20 pp.
(with Sang June Lee, Mark Siggers).
arXiv (2018/7/6)
 Extremal problems for finite sets (with Peter Frankl).
Student Mathematical Library,
Vol 86,
American Mathematical Society, 2018. viii+224 pp.
 A semidefinite programming approach to a crossintersection problem with measures (with Sho Suda, Hajime Tanaka)
arXiv (2015/4/1)
Math. Program. Ser A (2017) 166:113130.
 A note on HuangZhao theorem on intersecting families with large
minimum degree (with Peter Frankl),
Disc. Math., 340 (2017) 10981103.
pdf
 Toward extending the AhlswedeKhachatrian theorem to cross tintersecting families (with Sang June Lee, Mark Siggers),
arXiv (2015/9/8)
Discrete Applied Mathematics, 216 (2017) 627645.
 Invitation to intersection problems for finite sets.
(with Peter Frankl),
pdf
J. Combin. Theory Ser. A 144 (2016) 157211.
 Multiply union families in N^n (with Peter Frankl, Masashi Shinohara)
arXiv (2015/11/12, 2016/6/3)
European Jouranl of Cominlatorics 58 (2016) 6674.
 Intersection problems in the qary cube (with Peter Frankl),
pdf (2014/12/11,2016/1/29),
J. Combin. Theory Ser. A 141 (2016) 90126.
 Uniform eventown problems (with Peter Frankl),
pdf
Europ. J. Comb. 51 (2016) 280286.
 An ErdosKoRado theorem for cross tintersecting families
(with Peter Frankl, Sang June Lee, Mark Siggers)
J. Comb. Theory (A), vol 128 (2014) 207249.
pdf (2013/1/26,2014/02/01,2014/8/20 updated)
 The eigenvalue method for cross tintersecting families,
Journal of Algebraic Combinatorics, 38 (2013) 653662.
pdf
(2011/11/17,2012/12/21 updated)
 Twocolorings with many monochromatic cliques in both colors
(with Peter Frankl, Mitsuo Kato, Gyula O.H. Katona),
J. Comb. Theory (B), vol 103 (2013) 415427.
pdf (2011/10/14, 2013/4/25)
(this is a revised version of "An optimal coloring from a body of revolution")
 Cross tintersecting integer sequences from weighted ErdosKoRado,
Combinatorics, Probability and Computing, 22 (2013) 622637.
pdf (2013/3/30 updated)
 The Katona theorem for vector spaces (with Peter Frankl),
J. Comb. Theory (A), vol 120 (2013) 15781589.
pdf
(2013/11/13 updated)
 Counting lattice paths via a new cycle lemma (with Tomoki Nakamigawa)
pdf (2009/08/31, 2010/05/25, 2011/04/13, 2012/03/24 updated)
SIAM J. Discrete Math. 26 (2012) 745754.
 Application of arrangement theory to unfolding models
(with Hidehiko Kamiya and Akimichi Takemura),
pdf (2011/09/01)
Advanced Studies in Pure Mathematics 62 (2012) 399415
(Arrangements of hyperplanes  Sapporo 2009).
 The maximum size of intersecting and union families of sets
(with Mark Siggers)
pdf (2010/09/17, 2012/05/22 updated)
European Journal of Combinatorics 33 (2012) 128138.
 Tetrahedra passing through a triangular hole, and
tetrahedra fixed by a planar frame (with Imre Barany and
Hiroshi Maehara) pdf
(2011/08/03 updated)
Computational Geometry 45 (2012) 1420.
 On rcross intersecting families of sets
(with Peter Frankl) pdf
(2011/06/22 updated)
Combinatorics, Probability & Computing, 20 (2011) 749752.
 Classification of the Congruent Embeddings of a Tetrahedron into a
Triangular Prism (with Hiroshi Maehara),
Graphs and Combinatorics 27 (2011) 451463.
pdf (2009/09/14)
 A product version of the ErdosKoRado theorem,
J. Comb. Theory (A), vol 118 (2011) 15751587.
pdf
(2011/01/20 updated)
 On cross tintersecting families of sets,
J. Comb. Theory (A),
vol 117 (2010) 11671177.
pdf (2010/1/22 updated)
 Regular simplices passing through holes (with Hiroshi Maehara)
Geometriae Dedicata, vol 145 (2010) 1932.
pdf (2010/04/05 updated)
 A multiply intersecting ErdosKoRado theorem  the principal case,
Discrete Mathematics vol 310 (2010) 453460.
pdf
 Wallace's theorem and Miquel's theorem in higher dimensions
(with Hiroshi Maehara),
Journal of Geometry, vol 95 (2009) 6972.
pdf (updated 2008/09/11)
 Large regular simplices contained in a hypercube (with Hiroshi Maehara,
Imre Z. Ruzsa),
Periodica Mathematica Hungarica, 58 (2009) 121126.
pdf
(updated 2008/11/11)
 From linesystems to spheresystems
 Schlafli's double six, Lie's linesphere transformation,
and Grace's theorem,
(with Hiroshi Maehara) European Journal of Combinatorics, vol 30 (2009) 13371351.
pdf (updated 2008/11/11)
(2009/03/19 updated)
 Convex bodies passing through holes. (with Hiroshi Maehara)
RIMS Koukyuuroku 1641 Computational geometry and discrete mathematics
(2009), 6873
pdf
 The random walk method for intersecting families,
in Horizons of combinatorics, Bolyai society mathematical studies
vol 17 (2008) 215224.
pdf
 BraceDaykin type inequalities for intersecting uniform families,
European J. of Comb. Vol 29 (2008) 273285.
pdf (2006/10/11 updated)
 Multiplyintersecting families revisited,
J. Comb. Theory (B) Vol 97 (2007) 929948.
pdf (2006/10/11 updated)
 EKR type inequalities for 4wise intersecting families,
J. Comb. Theory (A) Vol 114 (2007) 575596.
pdf (2006/09/11 updated)
 The maximum size of 3wise tintersecting families,
European J. of Comb. Vol 28 (2007) 152166.
pdf (2005/10/06 updated)
 Integer and fractional packings of hypergraphs (with Vojtech Rodl,
Mathias Schacht, Mark Siggers),
J. Comb. Theory (B) Vol 97 (2007) 245268.
pdf (2006/06/12 updated)
 Extending the ErdosKoRado Theorem, Journal of Combinatorial Designs,
Vol 14 (2006) 5255.
 The maximum size of 4wise 2intersecting and 4wise 2union families,
European J. of Comb. Vol 27 (2006) 814825.
pdf (2005/10/06 updated)
 The maximum size of 3wise intersecting and 3wise union families
(with Peter Frankl), Graphs and Combinatorics, Vol 26 (2006) 225235.
pdf (2005/07/29 updated)
 An Lsystem on the small Witt design,
J. Comb. Theory (A) Vol 113 (2006) 420434.
pdf (2005/04/07)
 Density theorems and extremal hypergraph problems (with Vojtech Rodl,
Mathias Schacht, Eduardo Tengan), pdf , Israel J. Math.
Vol 152 (2006) 371380.
 Weighted nontrivial multiply intersecting families (with Peter Frankl),
Combinatorica Vol 26 (2006) 3746.
pdf (2005/04/18 updated)
 On a special arrangement of spheres (with Hiroshi Maehara),
Ryukyu Math. J. 19 (2006), 1524
pdf
 Intersecting families  uniform versus weighted,
Ryukyu Math. Journal, Vol 18 (2005) 89103.
pdf
 Random walks and multiply intersecting families (with Peter Frankl),
J. Comb. Theory (A) Vol 109 (2005) 121134.
pdf (2004/08/12 updated)
 A frog's random jump and the Polya identity, Ryukyu Math. Journal,
Vol 17 (2004) 89103.
pdf (2005/01/20 updated)
 The minimum area of lattice ngons (with Imre Barany), Combinatorica Vol 24 (2004) 171185.
ps
 Baby Epsilons (L. Wilson, S. Gandini. N. Tokushige) in "Experiment: conversations in
art and science" ed., B. Arends and D. Thackara, The Wellcome Trust (2003) 274307.
(ISBN 1 94129 043 2)
 Weighted multiply intersecting families (with Peter Frankl), Studia Sci. Math. Hungarica 40 (2003) 287291.
dvi /
pdf
 The game of ntimes nim (with Peter Frankl), Discrete Mathematics,
Vol.260 (2003) 205209.
dvi
 Weighted 3wise 2intersecting families (with Peter Frankl), J. Comb. Theory (A) Vol 100 (2002) 94115.
dvi /
pdf
 Graph decompositions through prescribed vertices without isolates
(with Yoshimi Egawa, Hikoe Enomoto), Ars Combinatoria, Vol. 62 (2002) 189205.
dvi (65k)
 When does a planar bipartite framework admit a continuous
deformation? (with Hiroshi Maehara), Theoretical Computer Science, Vol.263
(2001) 345354 pdf .
 Oriented graphs generated by random points on a circle (with
Y. Itoh, H. Maehara), J. Applied Probability, Vol.37 (2000) 534539.
 The ErdosKoRado theorem for integer sequences (with Peter Frankl),
Combinatorica, Vol. 19 (1999) 5563.
pdf
 Some inequalities concerning crossintersecting families
(with Peter Frankl), Combinatorics, Probability & Computing,
Vol. 7 (1998) 247260.
 Uniform intersecting families with covering number restrictions
(with Peter Frankl, Katsuhiro Ota), Combinatorics, Probability & Computing,
Vol. 7 (1998) 4756.
dvi (48k),
ps (225k)
 Every graph is an integral distance graph in the plane
(with Hiroshi Maehara, K. Ota), J. of Comb. Theory (A), Vol. 80 (1997) 290294.
dvi (17k),
ps (134k)
 A spartial unitbarframework which is rigid and trianglefree
(with Hiroshi Maehara), Graphs and Comb., Vol. 12, (1996) 341344.
 Exponents of uniform Lsystems
(with Peter Frankl, Katsuhiro Ota), J. Comb. Theory (A),
Vol. 75, (1996) 2343.
dvi (59k),
ps (302k)
 Covers in uniform intersecting families and a counterexample to a conjecture
of Lovasz (with Peter Frankl, Katsuhiro Ota), J. Comb. Theory (A),
Vol. 74 (1996) 3342.
dvi (39k),
ps (205k)
 Uniform intersecting families with covering number four
(with Peter Frankl, Katsuhiro Ota), J. Comb. Theory (A), Vol 71, (1995) 127145.
dvi (67k),
ps (294k)
 Minimum shadows in uniform hypergraphs and a generalization of the Takagi function
(with Peter Frankl, Makoto Matsumoto, Imre Z. Ruzsa), J. Comb. Theory (A), Vol 69,
(1995) 125148.
 Several inequalities concerning intersecting families, Ph.D. Thesis,
Keio Univ. (1993).
 Weight functions on the Kneser graph and the solution of an
intersecting problem of Sali (with Peter Frankl), Combinatorica, Vol. 13
(1993) 18.
 Binding numbers and ffactors of graphs (with Mikio Kano),
J. of Comb. Theory (B) Vol. 54 (1992) 213221.
 Some best possible inequalities concerning crossintersecting families (with Peter Frankl),
J. of Comb. Theory (A) Vol 61 (1992) 8797.
 A word problem in Artin semigroups (with Hikoe Enomoto, Hajime Mizutani), Discrete Math.
Vol. 104 (1992) 159166.
 The KruskalKatona Theorem, some of its analogues and applications,
(with Peter Frankl) Extremal Problems for Finite Sets, Visegrad (Hungary) 1991, 229250. pdf
 A word problem in Coxeter semigroups (with Hikoe Enomoto, Hajime Mizutani),
RIMS Koukyuuroku Vol. 735 (1990) 2842.
 A generalization of the Katona theorem for cross tintersecting families (with
Makoto Matsumoto), Graphs and Comb. Vol. 5 (1989) 159171.
 The exact bound in the ErdosKoRado theorem for crossintersecting families (with Makoto Matsumoto), J. of Comb. Theory (A) Vol. 52 (1989) 9097.
 Binding number and minimum degree for kfactors, J. of Graph Theory
Vol. 13 (1989) 607617.
japanese articles
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