December made "I have to realize" available on October 27, 2009. With this song being around four minutes long, at 4:01, 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. The song is number 6 out of 8 in Dear My Lover by December. Going off of the ISRC code of this track, we detected that the origin of this track is from South Korea. Based on our statistics, I have to realize's popularity is not that popular right now. The overall mood can be danceable to some, especially with it's high amount of postive energy.

I have to realize テンポ

The tempo marking of I have to realize by December is Allegro (fast, quick, and bright), since this song has a tempo of 138 テンポ. With that information, we can conclude that the song has a fast tempo. This song can go great with walking. The time signature for this track is 4/4.

I have to realize キー

A♭ Major is the music key of this track. This also means that this song has a camelot key of 4B. So, the perfect camelot match for 4B would be either 4B or 5A. While, 5B can give you a low energy boost. For moderate energy boost, you would use 1B and a high energy boost can either be 6B or 11B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 4A or 3B will give you a low energy drop, 7B would be a moderate one, and 2B or 9B would be a high energy drop. Lastly, 1A allows you to change the mood.