Ayumu Seko

Seko joined Cerezo Osaka in 2016. On 13 November, he debuted for their U-23 squad in J3 League (v Kataller Toyama). He gave his J1 League debut for the main squad on 7 December 2019, in 2–0 victory over Ōita. He signed a three-year contract with Swiss Super League team Grasshopper Club Zürich on 18 January 2022. On 17 June 2025, it was announced that he would depart Grasshoppers that summer, having made 117 league appearances for the Swiss record champions. On 23 July 2025, he signed with Ligue 1 side Le Havre.

Seko was called up to give his debut for the Japan national team in a friendly against Uzbekistan on 21 January 2022. However, the match was cancelled by the JFA due to COVID restrictions. In March 2023, he was called up by Hajime Moriyasu for friendlies against Uruguay and Colombia. This time, he was able to make his debut, having played a full match against Uruguay on 24 March 2023, which ended in a 1–1 draw. On 15 May 2026, Seko was selected in the 26-man squad for the 2026 FIFA World Cup.

Club

As of match played 29 August 2026

International

As of match played 25 June 2026

Individual

J.League Rookie of the Year: 2020 J.League Cup New Hero Award: 2020