Jieun Kim is credited alongside Hiromu Akaba as a composer for Pokémon Pokopia. The two names appear together in the game’s production credits under music composition.
Music helps define Pokopia’s slower atmosphere as players collect materials, build furniture, grow plants, and restore habitats. The game also includes changing times of day and weather, giving its audio presentation a world that can feel different across the player’s routine. The composer credit identifies the creators of the score, not the game’s sound director or writer.
Several names from the credits are plausible mix-ups. Marina Ayano is the art director, Masao Taya is the writer, and Yu Ito is one of the programmers. Hiromu Akaba and Jieun Kim are the pair listed as composers, making Jieun Kim the requested answer.