- Kristóf Bérczi and Yusuke Kobayashi:
**An algorithm for identifying cycle-plus-triangles graphs**,*Discrete Applied Mathematics*, to appear. - Takehiro Ito, Naonori Kakimura, Naoyuki Kamiyama, Yusuke Kobayashi, and Yoshio Okamoto:
**Efficient stabilization of cooperative matching games**,*Theoretical Computer Science*, to appear. - Yusuke Kobayashi and Kenjiro Takazawa:
**Randomized strategies for cardinality robustness in the knapsack problem**,*Theoretical Computer Science*, to appear. - Naonori Kakimura, Ken-ichi Kawarabayashi, and Yusuke Kobayashi:
**Packing edge-disjoint odd Eulerian subgraphs through prescribed vertices in 4-edge-connected graphs**,*SIAM Journal on Discrete Mathematics*, 31 (2017), pp. 766--782. - Yusuke Kobayashi and Sho Toyooka:
**Finding a shortest non-zero path in group-labeled graphs via permanent computation**,*Algorithmica*, 77 (2017), pp. 1128--1142. - Ken-ichi Kawarabayashi and Yusuke Kobayashi:
**An improved approximation algorithm for the edge-disjoint paths problem with congestion two**,*ACM Transactions on Algorithms*, 13 (2016), Article 5. - Kristóf Bérczi, Tamás Király, and Yusuke Kobayashi:
**Covering intersecting bi-set families under matroid constraints**,*SIAM Journal on Discrete Mathematics*, 30 (2016), pp. 1758--1774. - Ken-ichi Kawarabayashi and Yusuke Kobayashi:
**Edge-disjoint odd cycles in 4-edge-connected graphs**,*Journal of Combinatorial Theory, Series B*, 119 (2016), pp. 12--27. - Kensuke Otsuki, Yusuke Kobayashi, and Kazuo Murota:
**Improved max-flow min-cut algorithms in a circular disk failure model with application to a road network**,*European Journal of Operational Research*, 248 (2016), pp. 396--403. - Attila Bernáth, Yusuke Kobayashi, and Tatsuya Matsuoka:
**The generalized terminal backup problem**,*SIAM Journal on Discrete Mathematics*, 29 (2015), pp. 1764--1782. - Kota Ishihara and Yusuke Kobayashi:
**Routing algorithms under mutual interference constraints**,*Journal of the Operations Research Society of Japan*, 58 (2015), pp. 209--222. - Yusuke Kobayashi:
**The complexity of minimizing the difference of two M${}^\natural$-convex set functions**,*Operations Research Letters*, 43 (2015), pp. 573--574. - Ken-ichi Kawarabayashi and Yusuke Kobayashi:
**The edge-disjoint paths problem in Eulerian graphs and 4-edge-connected graphs**,*Combinatorica*, 35 (2015), pp. 477--495. - Holger Flier, Yusuke Kobayashi, Matúš Mihalák, Anita Schöbel, Peter Widmayer, and Anna Zych:
**Selecting vertex disjoint paths in plane graphs**,*Networks*, 66 (2015), pp. 136--144. - Akitoshi Kawamura and Yusuke Kobayashi:
**Fence patrolling by mobile agents with distinct speeds**,*Distributed Computing*, 28 (2015), pp. 147--154. - Yusuke Kobayashi:
**Triangle-free 2-matchings and M-concave functions on jump systems**,*Discrete Applied Mathematics*, 175 (2014), pp. 35--42. - Ryo Fujita, Yusuke Kobayashi, and Kazuhisa Makino:
**Robust matchings and matroid intersections**,*SIAM Journal on Discrete Mathematics*, 27 (2013), pp. 1234--1256. - Ken-ichi Kawarabayashi and Yusuke Kobayashi:
**An O(log n)-approximation algorithm for the edge-disjoint paths problem in Eulerian planar graphs**,*ACM Transactions on Algorithms*, 9 (2013), Article 16. - Yusuke Kobayashi, Kazuo Murota, and Robert Weismantel:
**Cone superadditivity of discrete convex functions**,*Mathematical Programming, Series A*, 135 (2012), pp. 25--44. - Ken-ichi Kawarabayashi and Yusuke Kobayashi:
**Fixed-parameter tractability for the subset feedback set problem and the S-cycle packing problem**,*Journal of Combinatorial Theory, Series B*, 102 (2012), pp. 1020--1034. - Yusuke Kobayashi, Jácint Szabó, and Kenjiro Takazawa:
**A proof of Cunningham's conjecture on restricted subgraphs and jump systems**,*Journal of Combinatorial Theory, Series B*, 102 (2012), pp. 948--966. - Yusuke Kobayashi and Yuichi Yoshida:
**Algorithms for finding a maximum non-k-linked graph**,*SIAM Journal on Discrete Mathematics*, 26 (2012), pp. 591--604. - Yusuke Kobayashi and Xin Yin:
**An algorithm for finding a maximum t-matching excluding complete partite subgraphs**,*Discrete Optimization*, 9 (2012), pp. 98--108. - Yuichi Yoshida and Yusuke Kobayashi:
**Testing the (s,t)-disconnectivity of graphs and digraphs**,*Theoretical Computer Science*, 434 (2012), pp. 98--113. - Ken-ichi Kawarabayashi and Yusuke Kobayashi:
**An immersion of a square in $4$-edge-connected graphs**,*Progress in Informatics*, 9 (2012), pp. 35--36. - Ken-ichi Kawarabayashi and Yusuke Kobayashi:
**A linear time algorithm for the induced disjoint paths problem in planar graphs**,*Journal of Computer and System Sciences*, 78 (2012), pp. 670--680. - Kristóf Bérczi and Yusuke Kobayashi:
**An algorithm for (n-3)-connectivity augmentation problem: jump system approach**,*Journal of Combinatorial Theory, Series B*, 102 (2012), pp. 565--587. - Ken-ichi Kawarabayashi, Yusuke Kobayashi, and Bruce Reed:
**The disjoint paths problem in quadratic time**,*Journal of Combinatorial Theory, Series B*, 102 (2012), pp. 424--435. - Shinji Imahori, Yuichiro Miyamoto, Hideki Hashimoto, Yusuke Kobayashi,
Mihiro Sasaki, and Mutsunori Yagiura:
**The complexity of the node capacitated in-tree packing problem**,*Networks*, 59 (2012), pp. 13--21. - Ken-ichi Kawarabayashi and Yusuke Kobayashi:
**An improved algorithm for the half-disjoint paths problem**,*SIAM Journal on Discrete Mathematics*, 25 (2011), pp. 1322--1330. - Ken-ichi Kawarabayashi and Yusuke Kobayashi:
**Algorithms for finding an induced cycle in planar graphs**,*Combinatorica*, 30 (2010), pp. 715--734. - Yusuke Kobayashi and Christian Sommer:
**On shortest disjoint paths in planar graphs**,*Discrete Optimization*, 7 (2010), pp. 234--245. - Yusuke Kobayashi:
**A simple algorithm for finding a maximum triangle-free 2-matching in subcubic graphs**,*Discrete Optimization*, 7 (2010), pp. 197--202. - Satoru Iwata and Yusuke Kobayashi:
**An algorithm for minimum cost arc-connectivity orientations**,*Algorithmica*, 56 (2010), pp. 437--447. - Yusuke Kobayashi:
**Induced disjoint paths problem in a planar digraph**,*Discrete Applied Mathematics*, 157 (2009), pp. 3231--3238. - Yusuke Kobayashi and Kenjiro Takazawa:
**Even factors, jump systems, and discrete convexity**,*Journal of Combinatorial Theory, Series B*, 99 (2009), pp. 139--161. - Yusuke Kobayashi and Kazuo Murota:
**Induction of M-convex functions by linking systems**,*Discrete Applied Mathematics*, 155 (2007), pp. 1471--1480. - Yusuke Kobayashi, Kazuo Murota, and Ken'ichiro Tanaka:
**Operations on M-convex functions on jump systems**,*SIAM Journal on Discrete Mathematics*, 21 (2007), pp. 107--129.

- Satoru Iwata and Yusuke Kobayashi:
**A weighted linear matroid parity algorithm**, Proceedings of the 49th ACM Symposium on Theory of Computing (STOC 2017), to appear. [full version] - Takehiro Ito, Naonori Kakimura, Naoyuki Kamiyama, Yusuke Kobayashi, and Yoshio Okamoto:
**Efficient stabilization of cooperative matching games**, Proceedings of the 15th International Conference on Autonomous Agents and Multiagent Systems (AAMAS 2016), 2016, pp. 41--49. - Yusuke Kobayashi and Kenjiro Takazawa:
**Randomized strategies for cardinality robustness in the knapsack problem**, Proceedings of the 13th Meeting on Analytic Algorithmics and Combinatorics (ANALCO 2016), 2016, pp. 25--33.

We found a mathematical error in Section 3.3, and this section is removed in the journal version. - Yasushi Kawase, Yusuke Kobayashi, and Yutaro Yamaguchi:
**Finding a path in group-labeled graphs with two labels forbidden**, Proceedings of the 42nd International Colloquium on Automata, Languages, and Programming (ICALP 2015), 2015, pp. 797--809. - Takehiro Ito, Naonori Kakimura, Naoyuki Kamiyama, Yusuke Kobayashi, and Yoshio Okamoto:
**Minimum-cost $b$-edge dominating sets on trees**, Proceedings of the 25th International Symposium on Algorithms and Computation (ISAAC 2014), LNCS 8889, 2014, pp. 195--207. - Ken-ichi Kawarabayashi, Yusuke Kobayashi, and Stephan Kreutzer:
**An excluded half-integral grid theorem for digraphs and the directed disjoint paths problem**, Proceedings of the 46th ACM Symposium on Theory of Computing (STOC 2014), 2014, pp. 70--78. - Yusuke Kobayashi and Kensuke Otsuki:
**Max-flow min-cut theorem and faster algorithms in a circular disk failure model**, Proceedings of the 33rd Annual IEEE International Conference on Computer Communications (INFOCOM 2014), 2014, pp. 1635--1643. - Attila Bernáth and Yusuke Kobayashi:
**The generalized terminal backup problem**, Proceedings of the 25th Annual ACM-SIAM Symposium on Discrete Algorithms (SODA 2014), 2014, pp. 1678--1686. - Ken-ichi Kawarabayashi and Yusuke Kobayashi:
**All-or-nothing multicommodity flow problem with bounded fractionality in planar graphs**, Proceedings of the 54th Annual IEEE Symposium on Foundations of Computer Science (FOCS 2013), 2013, pp. 187--196. - Akitoshi Kawamura and Yusuke Kobayashi:
**Fence patrolling by mobile agents with distinct speeds**, Proceedings of the 23rd International Symposium on Algorithms and Computation (ISAAC 2012), LNCS 7676, 2012, pp. 598--608. - Ken-ichi Kawarabayashi and Yusuke Kobayashi:
**Linear min-max relation between the treewidth of H-minor-free graphs and its largest grid minor**, Proceedings of the 29th Symposium on Theoretical Aspects of Computer Science (STACS 2012), 2012, pp. 278--289. - Ken-ichi Kawarabayashi and Yusuke Kobayashi:
**Edge-disjoint odd cycles in 4-edge-connected graphs**, Proceedings of the 29th Symposium on Theoretical Aspects of Computer Science (STACS 2012), 2012, pp. 206--217. - Ken-ichi Kawarabayashi and Yusuke Kobayashi:
**List-coloring graphs without subdivisions and without immersions**, Proceedings of the 23rd Annual ACM-SIAM Symposium on Discrete Algorithms (SODA 2012), 2012, pp. 1425--1435. - Naonori Kakimura, Ken-ichi Kawarabayashi, and Yusuke Kobayashi:
**Erd\H{o}s-P\'osa property and its algorithmic applications --- parity constraints, subset feedback set, and subset packing**, Proceedings of the 23rd Annual ACM-SIAM Symposium on Discrete Algorithms (SODA 2012), 2012, pp. 1726--1736. - Yusuke Kobayashi and Yuichi Yoshida:
**Algorithms for finding a maximum non-k-linked graph**, Proceedings of the 19th European Symposium on Algorithms (ESA 2011), LNCS 6942, 2011, pp. 131--142. - Ken-ichi Kawarabayashi and Yusuke Kobayashi:
**Breaking O(n^{1/2})-approximation algorithms for the edge-disjoint paths problem with congestion two**, Proceedings of the 43rd ACM Symposium on Theory of Computing (STOC 2011), 2011, pp. 81--88. - Ryo Fujita, Yusuke Kobayashi, and Kazuhisa Makino:
**Robust matchings and matroid intersections**, Proceedings of the 18th Annual European Symposium on Algorithms (ESA 2010), LNCS 6347, 2010, pp. 123--134. - Ken-ichi Kawarabayashi and Yusuke Kobayashi:
**Improved algorithm for the half-disjoint paths problem**, Proceedings of the 13th International Workshop on Approximation Algorithms for Combinatorial Optimization Problems (APPROX 2010), LNCS 6302, 2010, pp. 287--297. - Ken-ichi Kawarabayashi and Yusuke Kobayashi:
**An O(log n)-approximation algorithm for the disjoint paths problem in Eulerian planar graphs and 4-edge-connected planar graphs**, Proceedings of the 13th International Workshop on Approximation Algorithms for Combinatorial Optimization Problems (APPROX 2010), LNCS 6302, 2010, pp. 274--286. - Ken-ichi Kawarabayashi and Yusuke Kobayashi:
**The edge disjoint paths problem in Eulerian graphs and 4-edge-connected graphs**, Proceedings of the 21st Annual ACM-SIAM Symposium on Discrete Algorithms (SODA 2010), 2010, pp. 345--353. - Yusuke Kobayashi and Christian Sommer:
**On shortest disjoint paths in planar graphs**, Proceedings of the 20th International Symposium on Algorithms and Computation (ISAAC 2009), LNCS 5878, 2009, pp. 293--302. - Shinji Imahori, Yuichiro Miyamoto, Hideki Hashimoto, Yusuke Kobayashi,
Mihiro Sasaki, and Mutsunori Yagiura:
**The complexity of the node capacitated in-tree packing problem**, Proceedings of the International Network Optimization Conference 2009, 2009. - Yusuke Kobayashi and Ken-ichi Kawarabayashi:
**Algorithms for finding an induced cycle in planar graphs and bounded genus graphs**, Proceedings of the 20th Annual ACM-SIAM Symposium on Discrete Algorithms (SODA 2009), 2009, pp. 1146--1155. - Ken-ichi Kawarabayashi and Yusuke Kobayashi:
**The induced disjoint paths problem**, Proceedings of the 13th Conference on Integer Programming and Combinatorial Optimization (IPCO 2008), LNCS 5035, 2008, pp. 47--61.

- Satoru Iwata and Yusuke Kobayashi:
**Weighted linear matroid parity problem**, Proceedings of the 10th Japanese-Hungarian Symposium on Discrete Mathematics and Its Applications, 2017, to appear. - Yusuke Kobayashi and Yutaro Yamaguchi:
**On applications of weighted linear matroid parity**, Proceedings of the 10th Japanese-Hungarian Symposium on Discrete Mathematics and Its Applications, 2017, to appear. - Yusuke Kobayashi and Sho Toyooka:
**Finding a shortest non-zero path in group-labeled graphs**, Proceedings of the 9th Hungarian-Japanese Symposium on Discrete Mathematics and Its Applications, 2015, pp. 318--322. - Kristóf Bérczi, Tamás Király, and Yusuke Kobayashi:
**Algorithmic aspects of covering supermodular functions under matroid constraints**, Proceedings of the 9th Hungarian-Japanese Symposium on Discrete Mathematics and Its Applications, 2015, pp. 301--306. - Yusuke Kobayashi:
**Triangle-free 2-matchings and M-concave functions on jump systems**, Proceedings of the 8th Japanese-Hungarian Symposium on Discrete Mathematics and Its Applications, 2013, pp. 383--386. - Yusuke Kobayashi and Xin Yin:
**An algorithm for finding a maximum t-matching excluding complete partite subgraphs**, Proceedings of the 7th Hungarian-Japanese Symposium on Discrete Mathematics and Its Applications, 2011, pp. 494--502. - Yusuke Kobayashi, Kazuo Murota, and Robert Weismantel:
**Cone superadditivity of discrete convex functions**, Proceedings of the 7th Hungarian-Japanese Symposium on Discrete Mathematics and Its Applications, 2011, pp. 264--273. - Yusuke Kobayashi and Kenjiro Takazawa:
**Square-free 2-matchings in bipartite graphs and jump systems**, Proceedings of the 6th Japanese-Hungarian Symposium on Discrete Mathematics and Its Applications, 2009, pp. 187--197. - Yusuke Kobayashi, Kazuo Murota, and Ken'ichiro Tanaka:
**Operations on M-convex functions on jump systems**, Proceedings of the 5th Hungarian-Japanese Symposium on Discrete Mathematics and Its Applications, 2007, pp. 166--175.

- Satoru Iwata and Yusuke Kobayashi:
**A weighted linear matroid parity algorithm**, METR 2017-01, University of Tokyo (2017). [PDF] - Kristóf Bérczi and Yusuke Kobayashi:
**The directed disjoint shortest paths problem**, TR-2016-13, Egervary Research Group, Budapest (2016). - Kristóf Bérczi and Yusuke Kobayashi:
**An algorithm for identifying cycle-plus-triangles graphs**, TR-2016-12, Egervary Research Group, Budapest (2016). - Yusuke Kobayashi and Kenjiro Takazawa:
**Randomized strategies for cardinality robustness in the knapsack problem**, RIMS Preprint, RIMS-1833, 2015. - Kristóf Bérczi, Tamás Király, and Yusuke Kobayashi:
**Algorithmic aspects of covering supermodular functions under matroid constraints**, TR-2015-05, Egervary Research Group, Budapest (2015). - Yusuke Kobayashi and Sho Toyooka:
**Finding a shortest non-zero path in group-labeled graphs**, METR 2015-19, University of Tokyo (2015). - Kensuke Otsuki, Yusuke Kobayashi, and Kazuo Murota:
**Improved max-flow min-cut algorithms in a circular disk failure model with application to a road network**, METR 2015-13, University of Tokyo (2015). - Hiroshi Nishiyama, Yusuke Kobayashi, Yukiko Yamauchi, Shuji Kijima, and Masafumi Yamashita:
**The parity Hamiltonian cycle problem**, arXiv:1501.06323, 2015. - Yusuke Kobayashi:
**The complexity of maximizing the difference of two matroid rank functions**, METR 2014-42, University of Tokyo (2014). - Yasushi Kawase, Yusuke Kobayashi, and Yutaro Yamaguchi:
**Finding a path in group-labeled graphs with two labels forbidden**, METR 2014-41, University of Tokyo (2014). - Kristóf Bérczi, Tamás Király, and Yusuke Kobayashi:
**Covering intersecting bi-set families under matroid constraints**, TR-2013-06, Egervary Research Group, Budapest (2013). - Attila Bernáth, Yusuke Kobayashi, and Tatsuya Matsuoka:
**The generalized terminal backup problem**, TR-2013-07, Egervary Research Group, Budapest (2013). (See also METR 2013-25, University of Tokyo (2013).) - Yusuke Kobayashi and Kensuke Otsuki:
**Max-flow min-cut theorem and faster algorithms in a circular disk failure model**, METR 2013-15, University of Tokyo (2013). - Kota Ishihara and Yusuke Kobayashi:
**Routing algorithms under mutual interference constraints**, METR 2013-14, University of Tokyo (2013). - Yusuke Kobayashi:
**Triangle-free 2-matchings and M-concave functions on jump systems**, METR 2013-06, University of Tokyo (2013). - Yusuke Kobayashi and Yuichi Yoshida:
**Algorithms for finding a maximum non-k-linked graph**, METR 2011-23, University of Tokyo (2011). - Yusuke Kobayashi and Xin Yin:
**An algorithm for finding a maximum t-matching excluding complete partite subgraphs**, METR 2011-12, University of Tokyo (2011). - Ryo Fujita, Yusuke Kobayashi, and Kazuhisa Makino:
**Robust matchings and matroid intersections**, METR 2010-20, University of Tokyo (2010). - Yusuke Kobayashi, Jácint Szabó, and Kenjiro Takazawa:
**A proof to Cunningham's conjecture on restricted subgraphs and jump systems**, TR-2010-04, Egervary Research Group, Budapest (2010). - Yusuke Kobayashi and Christian Sommer:
**On shortest disjoint paths in planar graphs**, METR 2009-38, University of Tokyo (2009). - Yusuke Kobayashi, Kazuo Murota, and Robert Weismantel:
**Cone superadditivity of discrete convex functions**, METR 2009-30, University of Tokyo (2009). - Shinji Imahori, Yuichiro Miyamoto, Hideki Hashimoto, Yusuke Kobayashi,
Mihiro Sasaki, and Mutsunori Yagiura:
**The complexity of the node capacitated in-tree packing problem**, METR 2009-29, University of Tokyo (2009). - Yusuke Kobayashi:
**A simple algorithm for finding a maximum triangle-free 2-matching in subcubic graphs**, METR 2009-26, University of Tokyo (2009). - Kristóf Bérczi and Yusuke Kobayashi:
**An algorithm for (n-3)-connectivity augmentation problem: jump system approach**, METR 2009-12, University of Tokyo (2009). [revised version] - Yusuke Kobayashi and Kenjiro Takazawa:
**Square-free 2-matchings in bipartite graphs and jump systems**, METR 2008-40, University of Tokyo (2008). (See also RIMS Preprint, RIMS-1640, 2008.) - Ken-ichi Kawarabayashi and Yusuke Kobayashi:
**Algorithms for finding an induced cycle in planar graphs**, METR 2008-23, University of Tokyo (2008). - Yusuke Kobayashi and Kenjiro Takazawa:
**Even factors, jump systems, and discrete convexity**, METR 2007-36, University of Tokyo (2007). (See also RIMS Preprint, RIMS-1595, 2007.) - Yusuke Kobayashi:
**An extension of the disjoint paths problem**, METR 2007-14, University of Tokyo (2007). - Yusuke Kobayashi and Kazuo Murota:
**Induction of M-convex functions by linking systems**, METR 2006-43, University of Tokyo (2006). - Yusuke Kobayashi, Kazuo Murota, and Ken'ichiro Tanaka:
**Operations on M-convex functions on jump systems**, METR 2006-13, University of Tokyo (2006). - Naonori Kakimura and Yusuke Kobayashi:
**On odd-cycle-symmetry of digraphs**, METR 2005-36, University of Tokyo (2005). - Satoru Iwata and Yusuke Kobayashi:
**An algorithm for minimum cost arc-connectivity orientations**, METR 2005-16, University of Tokyo (2005).

- [Bachelor's Thesis] An algorithm for minimum cost arc-connectivity orientation (グラフの向き付けに関する最適化問題の解法), Faculty of Engineering, University of Tokyo, March 2005. (in Japanese)
- [Master's Thesis] On a discrete convex function on jump systems, Department of Mathematical Informatics, Graduate School of Information Science and Technology, University of Tokyo, March 2007.
- [Ph.D. Thesis] Algorithms for finding disjoint paths: acceleration and extension, Department of Mathematical Informatics, Graduate School of Information Science and Technology, University of Tokyo, March 2010.

- 小林佑輔，福永拓郎: 通信ネットワークのモデル化と最適化, オペレーションズ・リサーチ, Vol.60 No.8 (2015年8月号), pp. 443--448.