"The Day the Sun Disappeared" by Akira Senju was released on July 7, 2010. With The Day the Sun Disappeared being less than two minutes long, at 1:23, 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 鋼の錬金術師 FULLMETAL ALCHEMIST Original Soundtrack 3, so we believe that "The Day the Sun Disappeared" is a single. In terms of popularity, The Day the Sun Disappeared is currently below average in popularity. In our opinion, the overall tone is not very danceable and projects negative sounds, such as being sad, depressed, or angry.
The tempo marking of The Day the Sun Disappeared by Akira Senju is Moderato (at a moderate speed), since this song has a tempo of 119 テンポ. With that information, we can conclude that the song has a moderate tempo. This song can go great with walking. The time signature for this track is 4/4.
B♭ Major is the music key of this track. This also means that this song has a camelot key of 6B. So, the perfect camelot match for 6B would be either 6B or 7A. While, 7B can give you a low energy boost. For moderate energy boost, you would use 3B and a high energy boost can either be 8B or 1B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 6A or 5B will give you a low energy drop, 9B would be a moderate one, and 4B or 11B would be a high energy drop. Lastly, 3A allows you to change the mood.