All earnings from the singles and the corresponding album, Various Artists Featuring song+nation, were donated to the September 11 Relief Fund.

[3][4] Other artists under the Avex label also collaborated for the project, with all songs produced by Tetsuya Komuro.

[5] Both Kumi and BoA would release their own solo versions of the song on separate singles and/or album.

BoA released her solo version on her Listen to My Heart album in 2002.

Kumi released her solo version on her single love across the ocean (2002) and as a bonus track on her first greatest hits album Best ~first things~ (2005).