The 2017 J.League Cup (2017 Jリーグカップ), or officially the 2017 J.League YBC Levain Cup (2017 JリーグYBCルヴァンカップ), was the 42nd edition of the most prestigious Japanese football league cup tournament and the 25th edition under the current J.League Cup format.
Teams from the J.League Division 1 will take part in the tournament. Teams that qualified for 2017 AFC Champions League group stage (3 or 4 teams: later confirmed as Gamba Osaka, Kashima Antlers, Kawasaki Frontale and Urawa Red Diamonds) were given byes to the quarter-finals. The remaining teams (14 or 15 teams) started from the group stage, where they were divided into two groups of 7 or 8 teams. The group winners of each group were to qualify for the quarter-finals. The remained quarter-finalists (2 or 3 teams) were to be the winners of the play-off of the following two-legged ties:
If 3 teams automatically qualified for the quarter-finals due to the participation in AFC Champions League:
Group A runners-up v. Group B fourth place
Group A third place v. Group B third place
Group A fourth place v. Group B runners-up
If 4 teams automatically qualified for the quarter-finals due to the participation in AFC Champions League:
^"2017JリーグYBCルヴァンカップ 大会方式および試合方式について" [Tournament/matches format of 2017 J.League YBC Levain Cup]. J.League. 13 December 2016. Retrieved 18 September 2017.