| Day Alone | |
| Type: | studio |
| Artist: | Day After Tomorrow |
| Border: | yes |
| Released: | March 9, 2005 |
| Genre: | J-pop |
| Length: | 52:55 |
| Label: | Avex Trax |
| Prev Title: | Primary Colors |
| Prev Year: | 2004 |
| Next Title: | Single Best |
| Next Year: | 2005 |
Day Alone is the fifth studio album by Japanese J-pop band Day After Tomorrow.