2018: Having been forced to leave Barcelona after the Catalan club were found to have breached transfer regulations regarding the movement of under-18s, the 'Japanese Messi' was making waves back in his homeland, becoming the youngest player to both appear and score in the J.League.
2019: On the back of the most productive season of his career at senior level in 2019, Kubo made his international debut after being called-up to the Japan squad for the Copa America (they participated as one of the guest teams in Brazil). At club level, many expected him to return to Barcelona, but Real Madrid managed to secure his signature, before sending him on loan to newly-promoted Mallorca for the 2019-20 campaign.
2020: Kubo was one of the young stars of the Spanish season, directly contributing to nine goals as Mallorca fought against relegation. His form persuaded Villarreal to take him on loan for the following season.
2021: The forward failed to force his way into Unai Emery's team, and had his loan spell cut short in January 2021, with Madrid instead sending him on loan to Getafe for the remainder of the season, though he struggled to make much of an impact.
2022: Mallorca's promotion back to La Liga allowed them to make their move and bring Kubo back to the club on loan in 2021-22, and the Japan international's form having improved a little as a result.
2023: Kubo left Real Madrid to join Real Sociedad for an initial €6.5m in the summer of 2022, and he was back to his best in San Sebastian, as he made 18 direct goal contributions for a team that qualified for the Champions League.
2024: The Japan international continued to impress for La Real in 2023-24, and he was linked with elite clubs around Europe.
2025: Kubo hasn't quite hit the same heights so far this season in San Sebastian, leading to him being left out of the line up on a number of occasions.