| Official |
|---|
| 1.1 | 誓い -KINGDOM Orchestra Instrumental Version- | 4:22 | 宇多田ヒカル | KINGDOM HEARTS - III, II.8, Unchained χ & Union χ [Cross] - Original Soundtrack | Various Artists | Album + Soundtrack | | SQUARE ENIX MUSIC , Walt Disney Records | SQEX-10794, SQEX-10795, SQEX-10796, SQEX-10797, SQEX-10798, SQEX-10799, SQEX-10800, SQEX-10801 |
| 1.1 | 誓い -KINGDOM Orchestra Instrumental Version- | 4:21 | 宇多田ヒカル | KINGDOM HEARTS - III, II.8, Unchained χ & Union χ [Cross] – (Original Soundtrack) | Various Artists | Album + Soundtrack | | Walt Disney Records | D003729425 |
| Pseudo-Release |
|---|
| 1.1 | CHIKAI - KINGDOM Orchestra Instrumental Version- | 4:22 | Hikaru Utada | KINGDOM HEARTS - III, II.8, Unchained χ & Union χ [Cross] – (Original Soundtrack) | Various Artists | Album + Soundtrack | | | |
| 1.1 | CHIKAI -KINGDOM Orchestra Instrumental Version- | ?:?? | 宇多田ヒカル | KINGDOM HEARTS - III, II.8, Unchained χ & Union χ [Cross] - Original Soundtrack | Various Artists | Album + Soundtrack | | | |
| 1.1 | Chikai (KINGDOM Orchestra Instrumental Version) | 4:22 | Hikaru Utada | KINGDOM HEARTS - III, II.8, Unchained χ & Union χ [Cross] - Original Soundtrack | Various Artists | Album + Soundtrack | | | |