Flow (stylized as FLOW) is a Japanese rock band, that formed in 1998 and signed on to Sony Music Japan's Ki/oon Records label. Flow is a five-piece band made up of two vocalists, a drummer, a bassist and a guitarist. As of March 2014, the band has released 27 singles and nine albums.
The group's base was created in 1993 when brothers Kōshi (elder: vocals) and Take (younger: guitar) began playing together. They formed Flow in 1998, and were eventually joined by Keigo (vocals), Gotō (bass) and Iwasaki (drums; joined in 2000). In 2001, the band released its first maxi single, "Flow #0". The group then released two mini-albums within the same year, both of which took nationwide indie charts by storm. "Okuru Kotoba", Flow's first cover single, was released in January 2003. It remained on the Oricon indie chart for seven consecutive weeks and also hit an impressive No. 6 on the overall singles chart. In the spring of that year, their first full-scale album Splash!!! debuted at No. 2. In July 2003, Flow released the single "Blaster" on a major label, Ki/oon Records. In April 2004, they released "Go!!!", which stayed on the Oricon Top 10 Chart for three weeks. In May 2004, Flow released their first major album Game.
A string of singles followed and in July 2005 the band released its third album, Golden Coast. Since the release of Golden Coast, Flow has released two singles with new A-sides, but one of these ("Around the World/Kandata") was a double A-side release. "Colors" is the band's fourth single. The songs "Go!!!" and "Re:member" both served as opening themes to the anime series Naruto, as well as "Sign" for Naruto Shippuden. "Days" was the first opening for Bones' Eureka Seven anime, and "Realize" was the opening for the PlayStation 2 video games based on the same series. Flow performed live in America for the first time in Dallas, Texas on September 2, 2006 at Anime Fest which was held at the Hyatt Hotel and Convention center in downtown Dallas. Flow performed "Colors" in 2006, the first opening for Sunrise's original series, Code Geass: Lelouch of the Rebellion.
Their song "Answer" is the first opening theme for the live action Japanese drama Tantei Gakuen Q. They performed "Night Parade" with the hip-hop band Home Made Kazoku. In February 2008, they released a new single entitled "Arigatō", followed by Persona -trinity soul-'s new opening, "Word of the Voice" in June 2008. They performed Code Geass: Lelouch of the Rebellion R2's second opening theme "World End" released in 2008. In 2009, the band performed "Sign", the sixth opening for Naruto Shippuden. The band released a B-side compilation album on November 4, 2009. Their single "Calling" was featured as the ending for the anime Heroman. Flow returned to North America to perform at Anime Central, in Rosemont, Illinois on May 20, 2011, and FanimeCon in San Jose, California on May 28, 2010 and in May 2011. Their song "Hey!!" was the third opening theme for the anime Beelzebub and the song "Bravelue" was used as the second opening theme for the anime Eureka Seven AO. They provided a cover of "Cha-La Head-Cha-La" as the main theme song for the film Dragon Ball Z: Battle of Gods; the song, coupled with an insert song from the film, was released as a double A-side single on March 20, 2013, and subsequently would be featured as the opening theme for in the 2014 video game Dragon Ball Z: Battle of Z. Flow released their eighth studio album Flow The Max!!! on March 27, 2013. Their single "Ai Ai Ai ni Utarete Bye Bye Bye" released on February 26, 2014 is used as the second opening to the anime Samurai Flamenco.