ZZ est un groupe de rock originaire du japonais , leur musique est un peu du style neo metal . Ils se sont rendu célèbre surtout grâce à l'anime Eyeshield 21 avec leur single Be Survivor
discographie
* NO WAY OUT, January 2003
* Rhythmist, April 2003
* Yorokobi no Uta, August 2003
* Definitive Energy Flow, September 2003
* A to Z (Normal Edition), November 2003
* UNIVARSAL ZZ, January 2004
* A to ZZ - Complete Single Collection (CD+DVD), February 2004
* Nobody Knows, April 2004
* Pride Yourself, July 2004
* Just Only One/SAMURAI CREW, November 2004
* Generation Hip Innocence, January 2005
* Samurai Crew, February 2005
* ZZB, December 2005
* ZZ's "Be SURVIVOR" is sometimes used as an insert song in the anime series "Eyeshield 21"