時速36km made "優しい歌" available on June 3, 2020. With this song being about 5 minutes long, at 4:43, "優しい歌" by 時速36km 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. There is only one song in 優しい歌, so we believe that this song is a single. The popularity of 優しい歌 is currently below average in popularity right now. Based on the vibe, this track doesn't seem to be that danceable, however its valence properties can make this some somewhat danceable.
The tempo marking of 優しい歌 by 時速36km is Presto (very, very fast), since this song has a tempo of 179 テンポ. With that information, we can conclude that the song has a fast tempo. The time signature for this track is 4/4.
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.