Monaca's Producer name (10-dayP) originated from the number of days he took to learn the basics of Vocaloid/music-making, composing the song, setting the lyrics and uploading his work. He's the final member of s10rw, which is a group of Vocaloid producers centered on electronic music. Like with the rest of the group, Monaca is not a chronic uploader in Nico Nico Douga, having only produced a handful of songs even though he started his Vocaloid career in 2008. Read more on Last.fm