2019: Having been signed by Barcelona as a 10-year-old, the outrageously gifted attacker was forced to return to his native Japan in 2016 because of irregularities related to the Catalan club's recruitment of overseas players aged under 18. However, he was excelling in his homeland with FC Tokyo, and widely expected to return to La Masia sooner rather than later, only for Real Madrid to swoop in and sign him in the summer of 2019.
2020: Kubo was one of the young stars of the Spanish season after being loaned to Mallorca, directly contributing to nine goals as they 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, with the Japan international's form having improved a little as a result.