Hi-Fi Un!corn (하이파이유니콘)

Five members. One audition program. A debut routed through Tokyo rather than Seoul.

Hi-Fi Un!corn (하이파이유니콘) are a five-member boy group formed under FNC JAPAN — the Japanese subsidiary of South Korean entertainment company FNC Entertainment — whose path to the stage ran through one of the more competitive selection formats of their debut era.

Debut & Formation

The group's formation was determined by 《THE IDOL BAND: BOY'S BATTLE》, a boy band audition program broadcast on SBS M. The competitive format filtered candidates down to the five members who would officially debut on June 26, 2023. Operating under FNC JAPAN situates Hi-Fi Un!corn in a growing category of Korean-adjacent acts built with the Japanese market as a foundational consideration from the outset, rather than as a later expansion — a structural choice that shapes both their positioning and their audience development.

Members

The group's current five-member lineup consists of Hyunyul, Kiyoon, MIN, Shuto, and Taemin. The presence of Shuto — a Japanese-language given name — reflects the cross-market orientation of the project, consistent with FNC JAPAN's role as the managing entity.

Fandom

Hi-Fi Un!corn's official fandom carries the name RaSiDo, a designation that serves as the formal community identity for the group's fanbase across their activities.