Album Cover of Passion (Sanctuary). Sanctuary is the opening theme song of Kingdom Hearts II, Kingdom Hearts /2 Days and Kingdom Hearts 3D: Dream. " Passion " is a song recorded by Japanese singer Utada Hikaru, taken as the fourth single from . Utada embraced her second appearance with Kingdom Hearts II as she felt the experience was better than "Hikari", which she believed was. Download Kingdom Hearts 2 Theme Song - Passion [Utada Hikaru] soundtracks to your PC in MP3 format. Free Kingdom Hearts 2 Theme.