BECKBECK is a manga, which was later made into an anime under the name BECK: Mongolian Chop Squad. It was created by mangaka Harold Sakuishi and was originally published by Kodansha in Monthly Shōnen Magazine. It tells the story of a group of Japanese teenagers who form a rock band. The manga is currently licensed in the USA by Tokyopop. The series has also spawned three guidebooks. BECK won the 2002 Kodansha Manga Award for shōnen.
The original 26-episode anime television series was aired on Japan's TV Tokyo from October 2004 to March 2005. It was directed by Osamu Kobayashi, animated by Madhouse and produced by Takeshi Shukuri and Yoshimi Nakajima.
Yukio, known by his friends as "Koyuki", is a regular 14-year-old Japanese boy who enters junior high school with two childhood acquaintances. One is now a useless pervert, and ironically the other is a highly sought after female student. Koyuki's boring life is changed when he saves an odd-looking dog, named Beck, from some kids. Beck's owner turns out to be an emerging rock musician, Ryûsuke Minami, who soon influences Koyuki to start playing the guitar, and even gives one to him.
Koyuki, who was plagued by his boring existence, gradually matured through experiences with the band and began to discover who he really was.