Brothers KOHSHI (vocals) and TAKE (guitar) started music activities in 1993 and formed FLOW in 1998. KEIGO (vocals), GOT'S (bass) joined in 1999, and IWASAKI (drums) in 2000 to complete FLOW in its current form.
Since their major debut in 2003 with the single "Blaster", FLOW has released many hit songs with the strength and wide musicality of twin vocals. Especially known for its affinity with anime works, the opening theme "GO!!!" for the anime Naruto, "COLORS" the opening theme of Code Geass Lelouch of the Rebellion, and Tales of Zestiria opening and many more.