Musicians •
Hikaru Utada – production (1–13), writing (all tracks), vocals (all tracks), keyboards, programming (1–5, 7, 8, 10, 12); piano (1), additional drum programming (9, 13), additional keyboards and programming (11), shaker (10), Korean WaveDrum (10), vocals recording (1–3, 6–8, 10, 12) •
Nariaki Obukuro – production, keyboards (5, 7, 8, 11, 12); programming (5, 7, 8, 11, 12), vocals recording (11) •
Sam Shepherd – production, keyboards, programming (1, 6, 10); Rhodes piano (1), piano (6) •
A. G. Cook – production (2, 3, 14), keyboards (3), programming (2, 3), remix (14) •
Skrillex – production, programming (9, 13); writing (9, 13, 14), mixing (9, 13) •
Poo Bear – production (9, 13), writing (9, 13, 14) • Jodi Milliner – writing (1), bass (1, 4, 6, 11, 13), synth bass (2, 3, 9), Moog bass & Juno pad (5) • Ben Parker – guitar (1, 6, 7), acoustic guitar (11) • Reuben James – Wurlitzer piano (4), acoustic piano (9, 13), piano (11) • Will Fry – percussion (1, 7, 10) •
Leo Taylor – drums (1) •
Ash Soan – percussion (6) • Freddie Gavita – trumpet (1) •
Soweto Kinch – saxophone •
Chris Dave – percussion (9, 13) •
Yuta Bandoh – string arrangement, conducting (11) • Ensemble FOVE – strings (11) • Darren Heelis – additional drum programming (5) •
Tom Norris – additional drum programming (9, 13), mixing (9, 13) • Nobuaki Tanaka – additional programming (11) • The Artist's Son – violin (1), vocals (6)
Technical •
Steve Fitzmaurice – recording (1, 3, 4, 6, 7, 11), mixing (1–8, 10–12), additional instrumental recording (9) • Masahito Komori – vocals recording (4, 5, 9), strings recording (11), vocal tracks editing (4) • Yuya Saito – vocal tracks editing (1–8, 10–12) • Darren Heelis – additional recording (5), vocal recording assistance, additional engineering (7) • Marek Deml – recording, additional vocals recording (4) • Matt Jones – additional engineering assistance (7) •
Randy Merrill – mastering == Charts ==