"いつの日か" by Eikichi Yazawa was released on December 1, 2020. いつの日か is about six minutes long, preciously at 5:53, making this song fairly long compared to other songs. There is only one song in 10 BALLADS FROM EY LISTENERS, so we believe that "いつの日か" is a single. いつの日か is below average in popularity right now. Although the tone can be danceable to some, this track does projects more of a negative sound rather than a postive one.

いつの日か テンポ

The tempo marking of いつの日か by Eikichi Yazawa is Adagio (slowly with great expression), since this song has a tempo of 75 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.

いつの日か キー

G Major is the music key of this track. This also means that this song has a camelot key of 9B. So, the perfect camelot match for 9B would be either 9B or 10A. While, 10B can give you a low energy boost. For moderate energy boost, you would use 6B and a high energy boost can either be 11B or 4B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 9A or 8B will give you a low energy drop, 12B would be a moderate one, and 7B or 2B would be a high energy drop. Lastly, 6A allows you to change the mood.