Kousuke Atari's '少年時代' had a release date set for July 31, 2013. With this song being around four minutes long, at 3:40, 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 ベストカバーズ〜もっと日本。〜, so we believe that "少年時代" is a single. 少年時代 is not that popular right now. Although the tone can be danceable to some, this track does projects more of a negative sound rather than a postive one.
The tempo marking of 少年時代 by Kousuke Atari is Adagio (slowly with great expression), since this song has a tempo of 76 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.
This song is in the music key of A Major. This also means that 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.