*Club domestic league appearances and goals, correct as of 13:15, 26 June 2023 (UTC) ‡ National team caps and goals, correct as of 13:15, 26 June 2023 (UTC)
Kim joined the youth academy of Seongnam FC and worked his way up their youth categories.[2] On 7 February 2022, he signed his first semi-professional contract with the club ahead of the 2022 K League 1 season.[2] In doing so, he became the club's first ever semi-pro player, as well as their youngest registered player in the league that season.[3] On 18 October 2022, he was registered as a fully professional player.[4] He made 19 appearances in his debut season with Seongnam, earning interest from clubs abroad.[5]
Brentford
On 26 June 2023, Kim joined Premier League club Brentford for an undisclosed fee, signing a four-year contract with the club, with an option for an additional year, and being assigned to the B team.[6][7] During a season at the B team, he was on the list of senior squad in eight Premier League matches, but did not make his senior debut.[8]
On 7 June 2024, Kim was officially promoted to the senior team,[9] becoming the first-ever Korean centre-back to be affiliated to a Premier League club.[10]
International career
Kim is a youth international of South Korea, and played in the 2023 AFC U-20 Asian Cup and 2023 FIFA U-20 World Cup.[11] He became one of the most notable players in the latter competition after helping his team reach the semi-finals.[12]
Kim is a centre-back who has power, height and quick feet. He is able to score, and can play with both feet. He has been frequently compared to Kim Min-jae in his country due to his playing style.[3]