|Album||Clannad Original Soundtrack|
|Released||13 August 2004|
|Label||Key Sounds Label|
|Music by||Magome Togoshi|
|Arrangement by||Magome Togoshi|
Existence (存在, Sonzai) is the eighteenth track of the first disc of the Clannad Original Soundtrack album. It was released on 13 August 2004. There are two other versions of this song; Existence -e.piano- and Existence -piano-. Both are tracks of the third disk of the Clannad Original Soundtrack.