Where Chou's '約定' came out on April 16, 2002. With this song being around four minutes long, at 4:20, 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. There is only one song in 周蕙精選, so we believe that "約定" is a single. 約定 is average in popularity right now. Although the overall vibe is very danceable, it does project more negative sounds.

約定 テンポ

The tempo marking of 約定 by Where Chou is Andante (at a walking pace), since this song has a tempo of 80 テンポ. With that information, we can conclude that the song has a slow tempo. The time signature for this track is 3/4.

約定 キー

The music key of this track is E Major. This also means that this song has a camelot key of 12B. So, the perfect camelot match for 12B would be either 12B or 1A. While, 1B can give you a low energy boost. For moderate energy boost, you would use 9B and a high energy boost can either be 2B or 7B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 12A or 11B will give you a low energy drop, 3B would be a moderate one, and 10B or 5B would be a high energy drop. Lastly, 9A allows you to change the mood.