Artist: Utada Hikaru - Recording Engineer: Steve Fitzmaurice - Mixer: Steve Fitzmaurice - Recording Engineer: Steve Price - Asst. Recording Engineer: Jeremy Murphy - Recording Engineer: Masahito Komori - Additional Engineer: Darren Heelis - Vocals: Hikaru Utada - Drums: Ian Thomas - Electric Bass: Ben Parker - Electric Guitar: Ben Parker - Piano: Simon Hale - Drum Programming: Darren Heelis - Drum Programming: Steve Fitzmaurice - Percussion: Darren Heelis - Percussion: Steve Fitzmaurice - String Arranger: Simon Hale - String Arranger: Hikaru Utada - Music Production: Everton Nelson