"Passion" is a song recorded by Japanese singer Utada Hikaru, taken as the fourth single from her studio album Ultra Blue (2006). It premiered on December 14, 2005, in two physical formats and for digital consumption, distributed by EMI Japan and EastWorld. "Passion", alongside its English counterpart "Sanctuary", were used as the national and international theme songs to the Square Enix video game Kingdom Hearts II (2006); both tracks serve as the successor to "Hikari", which is found on Kingdom Hearts. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.