"手紙にかえて" by Kazuo Zaitsu was released on October 28, 2009. With this song being around four minutes long, at 3:41, 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 ふたりが眺めた窓の向こう, so we believe that "手紙にかえて" is a single. 手紙にかえて is not that popular right now. Although the overall vibe is very danceable, it does project more negative sounds.

手紙にかえて テンポ

The tempo marking of 手紙にかえて by Kazuo Zaitsu is Andante (at a walking pace), since this song has a tempo of 79 テンポ. With that information, we can conclude that the song has a slow tempo. The time signature for this track is 4/4.

手紙にかえて 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.