FIVE O ONE

Three members standing at the close of a 20th-anniversary world tour, bringing an encore concert back to Seoul — the conclusion of that run captures something essential about FIVE O ONE. The trio of Kim Hyunjoong, Heo Youngsaeng, and Kim Kyujong has sustained a fanbase across two decades, a tenure that places them among the longer-running acts in the K-pop male group landscape.

Members

The group is composed of three members: Kim Hyunjoong, Heo Youngsaeng, and Kim Kyujong. No formal role designations — lead vocalist, rapper, and so on — are attached to the current lineup in available records.

Marking Two Decades

The 20th-anniversary world tour, which culminated in an encore concert in Seoul in March 2026, served as the clearest measure of the group's longevity. The Seoul finale drew on a catalogue that stretches back to the group's origins, with performances of "Set It Off," "Because My Head Is Bad," and "U R Man" anchoring the setlist. That those titles carried recognizable weight in a concert hall setting — described at the time as generating genuine enthusiasm — speaks to a catalog that has held its audience across a significant stretch of time. The phrase offered from the stage, referencing "unchanging support for a long time," reflected the unusual arc of a group that has remained active and touring at the two-decade mark.