This 2001 single marked L'Arc-en-Ciel's first release on Sony Music Labels Inc. and served as the theme song for the anime film *Final Fantasy: The Spirits Within*.
- "Spirit Dreams Inside" was released on September 5, 2001, with a B-side titled "Lower World."
- The single reached #1 on the Japanese Oricon charts.
- The song was re-recorded and included on the band's 2001 album *Century Child*.
L'Arc-en-Ciel is a Japanese rock band formed in 1991, known for its prominent role in the visual kei movement and a successful career spanning decades. At the time of "Spirit Dreams Inside," the band had recently concluded a hiatus and was preparing for a significant international push.
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