Produced by members of Rip Slyme, Halcali became the first Japanese hip-hop unit to score high on the country's charts, mainly because their style made a huge emphasis on the pop side of things -- the band sticks to catchy melodies, lighthearted moods, and fun lyrics sprinkled with English gibberish. The duo is made up of childhood friends Halca (Haruka) and Yucali (Yukari), whose names were combined for "Halcali." The two Tokyo girls knew each other since elementary school and attended the same dance school; when they entered high school, they also tried for a "female rappers...