Inner Wave's 'Happy 21' came out on October 7, 2013. With this song being about 5 minutes long, at 5:21, "Happy 21" by Inner Wave is fairly a long song compared to the average song length. This song does not have an "Explicit" tag, making it safe for all ages. The track order of this song in Inner Wave's "III" album is number 3 out of 8. Based on our statistics, Happy 21's popularity 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.

Happy 21 テンポ

We consider the tempo marking of Happy 21 by Inner Wave to be Allegro (fast, quick, and bright) because the track has a tempo of 144 テンポ, a half-time of 72テンポ, and a double-time of 288 テンポ. Based on that, the speed of the song's tempo is fast. Activities such as, jogging or cycling, can go well with this song. The time signature for this track is 4/4.

Happy 21 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.