Submitted papers
On the number of contractible edges in plane triangulations (with T. Abe, M. Furuya and R. Mukae).
Construction of 4-connected triangulations on the projective plane (with R. Mukae).
Accepted papers
Published papers
New strategy on the existence of a spanning tree without small degree stems (with M. Furuya), The Electronic Journal of Combinatorics 32 (2025).
An odd 4-coloring of a maximal outerplanar graph, to appear in Discrete Mathematics (with M. Kashima, S. Maezawa, K. Osako and K. Ozeki), Discrete Mathematics 348, (2025) 114556.
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.