The name “HALCALI” is a combination of the two names “HALCA” and “YUCALI” and is fully produced by O.T.F (Oshare Track Factory) consisting of RYO-Z and DJ FUMIYA of RIP SLYME. The two have been very close dance school friends since elementary school. They won the 2002 female rapper audition and made their CD debut in January 2003 with the single “Tandem”. 2025 “Otsukare SUMMER” became a hit mainly overseas and is attracting attention again.