L'Arc~en~Ciel (ラルク アン シエル, Raruku An Shieru, "the rainbow" in French) is a popular Japanese rock band, formed in 1991. They are one of the most popular and affluent bands in Japan. They are known for their Pop/Rock sound while they occasionally produce heavier or more experimental tracks, ranging from techno to loose ballads with full string orchestration. The group has sold over 15 million albums, 30 million singles, and millions of other units, such as videos, and have been voted #58 in HMV Japan's "Top 100 Japanese Pop Artists" of all time. L'Arc~en~Ciel continuously dominates the Oricon charts.
P'unk~en~Ciel is an alternate formation of L'Arc~en~Ciel. Introduced in 2004, hyde takes over guitar, ken the drums, yukihiro plays the bass, while tetsu performs the vocals. P'unk~en~Ciel's songs have a more "punker-ish" sound and their music is usually heavier and faster with a different tone due to tetsu's vocals.