Rainbow: Nisha Rokubō no Shichinin

, is a Japanese manga series written by George Abe and illustrated by Masasumi Kakizaki. It began serialization in 2003 in Shogakukan Publishing's Weekly Young Sunday manga magazine but was moved to Big Comic Spirits when the magazine stopped publication. It was later published in twenty two bound volumes by Shogakukan from April 2003 to February 2010. The story is set in the 1950s and focuses on six junior delinquents aged sixteen to seventeen that are sent to the Shōnan Special Reform School. They learn to cope with the atrocities and unfairness they encounter there. In 2005 it won in the general category of the Shogakukan Manga Award along with A Spirit of the Sun.

An anime television series produced by Madhouse Studios and directed by Hiroshi Koujina began airing in Japan on April 6, 2010.

Plot
Set in the 1950s, the story centers around six junior delinquents and their mentor at the Shōnan Special Reform School near Tokyo. The manga follows the boys' lives during their time in the school and the years after they leave.