Koki Okamoto made "LETTER" available on October 23, 2019. With this song being about 5 minutes long, at 4:43, "LETTER" by Koki Okamoto is fairly a long song compared to the average song length. This song does not have an "Explicit" tag, making it safe for all ages. The track order of this song in Koki Okamoto's "GIRL" album is number 3 out of 12. In terms of popularity, LETTER is currently below average in popularity. The overall tone is very danceable, especially with its high energy, which produces more of a euphoric, cheerful, or happy vibe.

LETTER テンポ

We consider the tempo marking of LETTER by Koki Okamoto to be Andante (at a walking pace) because the track has a tempo of 95 テンポ, a half-time of 48テンポ, and a double-time of 190 テンポ. Based on that, the speed of the song's tempo is slow. Activities such as, yoga or pilates, can go well with this song. The time signature for this track is 4/4.

LETTER キー

This song is in the music key of C Major. This also means that this song has a camelot key of 8B. So, the perfect camelot match for 8B would be either 8B or 9A. While, 9B can give you a low energy boost. For moderate energy boost, you would use 5B and a high energy boost can either be 10B or 3B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 8A or 7B will give you a low energy drop, 11B would be a moderate one, and 6B or 1B would be a high energy drop. Lastly, 5A allows you to change the mood.