At the international level, he represents Korea DPR U20. He plays primarily as a Midfield. He stands at 178cm tall and weighs 67kg.

Across 3 appearances in the AFC U20 Asian Cup 2024-2025, Hyon-jun·Kim registered 0 goals and 0 assists, while completing 1 key passes out of 18 total passes with a passing accuracy of 4.7.