XATASHI's 'FAST!' came out on October 21, 2021. FAST! is 2 minutes and 15 seconds long and may contain bad words that may be unsuitable for children. Because this song is the only song in FAST! and no other songs are present in the album, we classify this track as a single. In terms of popularity, FAST! is currently below average in popularity. Although the overall vibe is very danceable, it does project more negative sounds.

FAST! テンポ

The tempo marking of FAST! by XATASHI is Andante (at a walking pace), since this song has a tempo of 100 テンポ. With that information, we can conclude that the song has a slow tempo. The time signature for this track is 4/4.

FAST! キー

The music key of this track is E Minor. Because this track belongs in the E Minor key, the camelot key is 9A. So, the perfect camelot match for 9A would be either 9A or 8B. While, a low energy boost can consist of either 9B or 10A. For moderate energy boost, you would use 6A and a high energy boost can either be 11A or 4A. However, if you are looking for a low energy drop, finding a song with a camelot key of 8A would be a great choice. Where 12A would give you a moderate drop, and 7A or 2A would be a high energy drop. Lastly, 12B allows you to change the mood.