原因は自分にある。's ' "希望的観測の定義" was released on its scheduled release date, October 15, 2025. With this song being around four minutes long, at 3:47, 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 パラノイドランデブー, so we believe that "希望的観測の定義" is a single. The popularity of 希望的観測の定義 is currently average in popularity right now. The overall mood can be danceable to some, especially with it's high amount of postive energy.
The tempo marking of 希望的観測の定義 by 原因は自分にある。 is Presto (very, very fast), since this song has a tempo of 187 BPM. 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.
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