He is a former main vocalist of the K-pop group U-KISS and is highly active internationally, traveling between South Korea, Japan, and the United States.
In 2025, he gained major global attention through the Netflix animated film K-Pop Demon Hunters, which became a worldwide hit. The songs “Soda Pop” and “Your Idol”, performed by the boy group SajaBoys, reached the Top 3 on the Billboard charts, generating a strong global response.
As a Korean American, he has expanded his career beyond the Asian music scene to include work as an actor in U.S. Broadway and Hollywood, establishing himself as a truly global artist.