Jun Ichikawa's '天の川' had a release date set for January 8, 2020. With This song being less than two minutes long, at 1:07, we are fairly confident that this song is not explicit and is safe for all ages. Based on the duration of this song, this song duration is much smaller than the average song duration. There is only one song in 「ぼくらの7日間戦争」オリジナル・サウンドトラック, so we believe that "天の川" is a single. 天の川 is unknown right now. Although the overall vibe is very danceable, it does project more negative sounds.
The tempo marking of 天の川 by Jun Ichikawa is Andante (at a walking pace), since this song has a tempo of 80 BPM. With that information, we can conclude that the song has a slow tempo. The time signature for this track is 3/4.
This song is in the music key of G Major. 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.
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