Submitted papers
New strategy on the existence of a spanning tree without small degree stems (with M. Furuya).
Construction of 4-connected triangulations on the projective plane (with R. Mukae).
Accepted papers
An odd 4-coloring of a maximal outerplanar graph, to appear in Discrete Mathematics (with M. Kashima, S. Maezawa, K. Osako and K. Ozeki).
Published papers
Refinements of degree conditions for the existence of a spanning tree without small degree stems (with M. Furuya and A. Saito), Discrete Mathematics 348, (2025) 114307 .
Forbidden subgraphs restricting vertices of degree two in a spanning tree (with M. Furuya), The Electronic Journal of Combinatorics 31, (2024).
Characterization of Graphs of Diameter 2 Containing a Homeomorphically Irreducible Spanning Tree (with S. Shan), Journal of Graph Theory 104, (2023) 886-903.
Degree sum conditions for the existence of Homeomorphically Irreducible Spanning Trees (with T. Ito), Journal of Graph Theory 99, (2022) 162-170.
Degree sum conditions for the existence of spanning k-trees in star-free graphs (with M. Furuya, S. Maezawa, R. Matsubara, H. Matsuda and T. Yashima), Discussiones Mathematicae Graph Theory 42, (2022) 5-13.
Large homeomorphically irreducible trees in path-free graphs (with M. Furuya), Journal of Graph Theory 93, (2020) 372-394.
Characterizing the difference between graph classes defined by forbidden pairs including the claw (with G.Chen, M. Furuya, S. Shan and P. Yang), Graphs and Combinatorics 35, (2019) 1459-1474.
The Volume of a Crosspolytope Truncated by a Halfspace (with E. Ando), Lecture Notes in Computer Science 11436, (2019) 13-27.
Forbidden pairs for equality of connectivity and edge-connectivity of graphs (with S. Wang and L. Xiong), Graphs and Combinatorics 35, (2019) 419-426.
Hamiltonicity of planar graphs with a forbidden minor (with M.N. Ellingham, E.A. Marshall, and K. Ozeki), Journal of Graph Theory 90, (2019) 459-483.
Monochromatic homeomorphically irreducible trees in 2-edge-colored complete graphs (with M. Furuya), Journal of Combinatorics 9, (2018) 681-691.
Plane graphs without homeomorphically irreducible spanning trees (with R. Nomura), Ars Combin. 141, (2018) 157-165.
Distance-restricted matching extendability of fullerene graphs (with M. Furuya and M. Takatou), Journal of Mathematical Chemistry 56, (2018) 606-617.
Plane triangulations without a spanning Halin subgraph II (with G. Chen, H. Enomoto and K. Ozeki), SIAM J. Discrete Math. 31, (2017) 2429–2439.
Forbidden pairs and the existence of a spanning Halin subgraph (with G. Chen, J. Han, S. O and S. Shan), Graphs and Combinatorics 33, (2017) 1321–1345.
A degree condition implying Ore-type condition for even [2, b]-factors in graphs (with T. Yashima), Discussiones Mathematicae Graph Theory 37, (2017) 797–809.
A Characterization of K_{2, 4}-Minor-Free Graphs (with M.N. Ellingham, E.A. Marshall, and K. Ozeki), SIAM J. Discrete Math. 30, (2016) 955-975.
Rooted HIST property on planar triangulations, Ars Combinatoria 126, (2016) 29-40.
Dominating Cycles and Forbidden Pairs Containing P5 (with S. Chiba and M. Furuya), Graphs and Combinatorics 32, (2016) 1773–1788.
Forbidden pairs and the existence of a dominating cycle (with S. Chiba and M. Furuya), Discrete Math. 338, (2015) 2442-2452.
Claw-Free and N(2, 1, 0)-Free Graphs are Almost Net-Free (with M. Furuya), Graphs and Combinatorics 31, (2015) 2201–2205.
Plane triangulations without a spanning Halin subgraph : Counterexamples to the Lovasz-Plummer conjecture on Halin graphs (with G. Chen, H. Enomoto and K. Ozeki), SIAM J. Discrete Math. 29, (2015) 1423-1426.
A characterization of P5-free graphs with a homeomorphically irreducible spanning tree (with J. Diemunsch, M. Furuya, M. Sharifzadeh, D. Wang, J. Wise and E. Yeager), Discrete Applied Mathematics 185, (2015) 71-78.
Forbidden Subgraphs and the existence of a spanning tree without small degree stems (with M. Furuya), Discrete Math. 313, (2013) 2206-2212.
HISTs of triangulations on surface (with A. Nakamoto), AKCE International Journal of Graphs and Combinatorics 10, (2013) 1-14.
On geometrically realizable Möbius triangulations (with A. Nakamoto), Discrete Math. 312, (2012) 2135-2139.
A face of a projective triangulation removed for its geometric realizability (with A. Nakamoto), Discrete & Computational Geometry 47, (2012) 215-234.
Departmental Bulletin Papers
Homeomorphically Irreducible Spanning Trees in Small Graphs (with T. Ito, Y. Nakamura and Y. Tanioka), Information Science and Applied Mathematics 28, (2021) 1-16.
Homeomorphically irreducible spanning trees in fullerene graphs, Network and Information 26, (2018) 37-41.
Refereed Conference Proceedings
Geometric realization of a traingulation on the Klein bottle with one face removed (with A. Nakamoto), Proceedings of the 26th European Workshop on Comptaional Geometry, 265-268.
Every 4-connected Möbius triangulation is geometrically realizable, (with A. Nakamoto), Proceedings of the 25th European Workshop on Comptaional Geometry, 223-226.