Twenty-four minutes into his Real Sociedad debut at Cádiz, Kubo ran onto a Mikel Merino pass and scored the only goal of the match, aged 21 years and 71 days on 14 August 2022. He started Japan's wins over Germany and Spain at the 2022 World Cup, won the Copa del Rey in April 2026, and was named the club's player of the season in 2022-23 and La Liga's player of the month in September 2023. Career record: 48 caps and 7 goals for Japan; club career at FC Tokyo, RCD Mallorca, Real Sociedad.
| 2016–2019 | FC Tokyo |
| 2018–2019 | Yokohama F. Marinos |
| 2019–2020 | RCD Mallorca |
| 2019–2022 | Real Madrid Club de Fútbol |
| 2020–2021 | Villarreal CF |
| 2021–2021 | Getafe CF |
| 2021–2022 | RCD Mallorca |
| 2022–today | Real Sociedad |
| Japan | 48 caps, 7 goals |
Japan legends whose careers overlapped Kubo's
One rank above: Shinji Okazaki at #14.
One rank below: Shinji Ono at #16.
Japan's editorial top five: Hidetoshi Nakata · Shinji Kagawa · Keisuke Honda · Makoto Hasebe · Shunsuke Nakamura.