- Backing vocals
- Additional guitars
- Nard Berings on "Aishi-Aisare"
- Tim Palmer on tracks 4, 6 and 10
- Federico Miranda on "Blink"
- Bass
- Armand Sabal-Lecco on tracks 2, 3, 6 and 7
- Shawn Davis on "Shirase" and "Marie"
- Juan Alderete on "Kunou no Hate no Sore mo Kotae no Hitotsu"
- Abel Guier on "Blink"
- Dorian Heartsong and Stuart Zender on "Trophy"
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- Drums and percussion
- Matt Sherrod on tracks 1, 2, 3, 6, 7, 8 and 11, Glockenspiel on "My Heart Your Heart"
- Mark Shulman on "Aishi-Aisare"
- Massimo Hernandez and Matt Sorum on "Blink"
- Taylor Hawkins on "Blink" and "Trophy", rock drums on "Trophy"
- Steve Ferrone – drums on "Shirase"
- David Leach – percussion on "Shirase"
- Denny Seiwell – percussion on "Nishi-Higashi"
- Adrian Harjo and Logan Staats – pow wow drums on "Trophy"
- Keyboards
- Amp Fiddler on tracks 1, 2, 6, 8 and 9
- Hideyuki Terachi on "Sayonara River" and "Error Message"
- Lou Pomanti on tracks 5, 7, 9, 11 and 12
- Matt Sherrod on "Error Message" and "My Heart Your Heart"
- Ricky Peterson on "Nishi-Hiashi"
- Luis Montalbert-Smith and Tim Palmer on "Blink"
- Other musicians
- Hideyuki Terachi – pre-production programming
- Nard Berings – electronic treatment on tracks 1, 3, 7 and 12, programming on "Aishi-Aisare"
- Matt Sherrod – electronic treatment on "Nishi Shigashi", programming
- Lou Pomanti – electronic treatment on "Blink"
- Jean Marie Horvat – heartbeat on "My Heart Your Heart"
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