小久保淳平 made "時代の鏡" available on October 5, 2016. 時代の鏡 is about six minutes long, preciously at 5:41, making this song fairly long compared to other songs. There is only one song in あかるいみらい, so we believe that "時代の鏡" is a single. 時代の鏡 is not that popular right now. Since there is more of a neutral sound being played, this makes the track somewhat danceable.

時代の鏡 テンポ

The tempo marking of 時代の鏡 by 小久保淳平 is Adagio (slowly with great expression), since this song has a tempo of 70 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.

時代の鏡 キー

D Major is the music key of this track. 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.