Lost In Time made "約束" available on March 7, 2012. With this song being around four minutes long, at 4:27, 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. The song is number 5 out of 16 in BEST「きのう編」 by LOST IN TIME. The popularity of 約束 is currently not that popular right now. Based on the vibe, this track doesn't seem to be that danceable, however its valence properties can make this some somewhat danceable.

約束 テンポ

The tempo marking of 約束 by Lost In Time is Presto (very, very fast), since this song has a tempo of 180 テンポ. With that information, we can conclude that the song has a fast tempo. The time signature for this track is 4/4.

約束 キー

This song is in the music key of D Major. This also means that this song has a camelot key of 10B. So, the perfect camelot match for 10B would be either 10B or 11A. While, 11B can give you a low energy boost. For moderate energy boost, you would use 7B and a high energy boost can either be 12B or 5B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 10A or 9B will give you a low energy drop, 1B would be a moderate one, and 8B or 3B would be a high energy drop. Lastly, 7A allows you to change the mood.