J_ust's 'a handwritten letter' came out on October 23, 2019. With this song being around four minutes long, at 3:55, the duration of this song is pretty average compared to other songs. This track is safe for children and doesn't appear to contain any foul language, since the "Explicit" tag was not present in this track. Since T_wo, Third only contains only one song in the album, we like to consider this song as a single. Furthermore, we believe that the track originated from South Korea. Based on our statistics, a handwritten letter's popularity is below average in popularity right now. Although the overall vibe is very danceable, it does project more negative sounds.

a handwritten letter テンポ

With a handwritten letter by J_ust having a テンポ of 120 with a half-time of 60 テンポ and a double-time of 240 テンポ, we would consider this track to have a Moderato (at a moderate speed) tempo marking. Because of this, we believe that the song has an overall fast tempo. Looking at the テンポ of this song, this song might go great with walking. The time signature for this track is 4/4.

a handwritten letter キー

This song is in the music key of A Major. Or for those who are familiar with the camelot wheel, this song has a camelot key of 11B. So, the perfect camelot match for 11B would be either 11B or 12A. While, 12B can give you a low energy boost. For moderate energy boost, you would use 8B and a high energy boost can either be 1B or 6B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 11A or 10B will give you a low energy drop, 2B would be a moderate one, and 9B or 4B would be a high energy drop. Lastly, 8A allows you to change the mood.