FLOW is a five-piece rock band made of up KOHSHI (Vocals), KEIGO (Vocals), TAKE (Guitar), GOT'S (Bass), and IWASAKI (Drums). KOHSHI (Vocals) and his brother, TAKE (Guitar), have been making music together since 1993. They formed FLOW in 1998 and eventually joined by KEIGO (Vocals) and GOT'S (BASS) in 1999 and IWASAKI (Drums) in 2000. In 2003, they had their major debut with the single "Blaster" and ever since, they've unleashed their brand of music with their melodic and powerful double vocals throughout the world. Their music was an excellent fit for anime so they went on to do many anime songs such as "GO!!!" as an opening song for the anime Naruto; "Colors," an opening song for Code Geass: Lelouch of the Rebellion; and the opening song for Tales of Zesteria the X, "Kaze no Uta."

They started performing overseas in 2006 and have now performed 58 shows in 19 countries all over the world including countries in Asia, North America, South America, and Europe, proving that their powerful live performances can cross borders. In 2018, they held a concert tour entitled 15^th Anniversary TOUR 2018 "Anime Shibari" focusing only on the anime theme songs and anime related songs they have sung and toured in Japan and 5 countries in Central and South America. In January 2019, they successfully held their concert at the Nippon Budokan for the second time after their first performance 10 years ago and released the album "TRIBALYTHM" in April. They then held FLOW LIVE TOUR 2019 "TRIBALYTHM" in 7 cities throughout Japan. Moreover, in the end of September 2019, the opening song for Naruto Shippuden, "Sign," exceeded 30 million plays on the subscription service Spotify and all of their songs exceeded a total of 100 million plays.