"Sign" is the twenty-sixth single released by Mr. Children on May 26, 2004.

The title track was used as the theme song to the Japanese drama Orange Days[1] and won the 'Song of the Year' award, known as the 'Grand Prize', in addition to the 'Gold Prize' award at the 46th annual Japan Record Awards[2][3] ten years after the group's win for their 1994 single "Innocent World".

The single went on to also win 'Best Theme Song' at the 41st Television Drama Academy Awards[4] and also 'Song of the year' at the 19th Annual Japan Gold Disc Awards.

[5] Like their previous single, it debuted at number one with 370,000 copies in its first week.

All tracks are written by Kazutoshi Sakurai This 2000s Japanese single–related article is a stub.