2023 Yokohama F. Marinos season

The 2023 Yokohama F. Marinos season is the club's 51st season in existence and the 41st consecutive season in the top flight of Japanese football. In addition to the domestic league, in which they are the defending champions, Yokohama F. Marinos participates in this season's editions of the Emperor's Cup, the J.League Cup and the AFC Champions League.

The club officially started the 2023 season resuming training sessions on 10 January 2023. They unveiled the team for the 2023 season including new signings presentations, as well as new shirt number system, on 14 January 2023.

J1 League
Marinos is the current champions of the competition, winning the last season title on the last round after beating Vissel Kobe by 3–1. They stayed 2 points off Kawasaki Frontale, who also won their last league match against FC Tokyo, meaning that if Marinos had lost to Vissel, Frontale would be crowned J1 champions for a third consecutive season. With this title win, Marinos started the season as the second team with most J1 League titles, with 5 in total. They need 3 more titles to tie with 8-times J1 champions Kashima Antlers.

Matches
The opening match was released by the J.League on 23 December 2022. The full league fixtures were released on 20 January 2023.

Emperor's Cup
As a J1 League club, Marinos starts the competition at the second round, not having to play prefectural qualifiers.

J.League Cup
As Marinos qualified for the AFC Champions League, the club would immediately be awarded a bye from the competition's group stage, entering it only in the quarter-finals. However, as the continental tournament only starts on September, instead of early in the year (as usual), Marinos had to play the group stage alongside the other 19 participating teams.

Quarter-finals
Yokohama F. Marinos won 5–3 on aggregate.

Semi-finals
Urawa Red Diamonds won 2–1 on aggregate.

AFC Champions League
Marinos qualified to play the 2023–24 AFC Champions League as 2022 J1 League champions. With the title, the club earned a direct entry to the competition's group stage. The group stage is planned by the AFC to start on 18 September 2023.