| Why | |
| Cover: | Why (Miliyah Kato).jpg |
| Type: | single |
| Artist: | Miliyah Kato |
| Album: | Heaven |
| Released: | November 18, 2009 |
| Recorded: | Late 2009 |
| Genre: | Pop, pop rock, urban |
| Length: | 17:01 |
| Label: | Mastersix Foundation |
| Producer: | Shinichiro Murayama, Jeff Miyahara |
| Prev Title: | Love Forever |
| Prev Year: | 2009 |
| Next Title: | Forever Love |
| Next Year: | 2010 |
"Why" is Japanese singer-songwriter and composer Miliyah Kato's sixteenth single, and the first to be taken from her fifth studio album Heaven. It was released throughout Japan on November 18, 2009.
The title track "Why" is lyrically the sequel song to "Sayonara Baby" from 2008. A music video for the song was released as promotion, directed by Shigeaki Kubo. The first b-side "Destiny" was used as the main theme song for , released on November 28 throughout Japan. The song could be heard in the Japanese trailers for the film.[1] A music video, directed by Moocho, was also recorded for "Destiny".
Also featured on the single is the music video for "Aitai" from Kato's fourth studio album Ring, the video for "Aitai" later won the Best R&B Video award at the MTV Video Music Awards Japan 2010 on May 29, 2010.[2]