As the host, South Korea was allowed to participate in both tournaments, but with teams of alternate genders.

[2] *   Host nation (South Korea)The top eleven NOCs ranked in the combined rankings from the 2022 and 2023 editions of the IIHF World U18 Championships and IIHF Women's World U18 Championships, and host South Korea, were allowed to enter either a boys' team or a girls' team for the traditional tournament (also called the 6-team tournament or 6-on-6 tournament).

Each country was permitted one team totaling eighteen players, of which fifteen were skaters and three were goaltenders.

[3][4] For the 3-on-3 tournament, countries ranked 12th to 27th, including host South Korea, fielded one team of thirteen players (eleven skaters and two goaltenders).

[3][4] As the host country, South Korea was granted one team per tournament.