The popular songs in the 20th century were produced by lyricists and composers and those delivered to the listeners' ears through promotional activities by promoters working at record companies. However, among the widespread use of the Internet platform, the number of users of DAW (Digital Audio Works) has expanded and the distance between producers and listeners has been reduced. Vocaloid is popular among non-professional users that it allows users to create their own music by using voice synthesis technology that makes a fictional character sing a song.

In addition, there is a possibility of secondary creation by Vocaloid has further developed. The scale of the Vocaloid market in Japan in FY 2017 was JPY 10 billion, up 4.2% from the previous year. Not only the limited trend which was only recognized by "geek", but Vocaloid also spreads to teenagers and women and it has been sung frequently in Karaoke now. In this study, we firstly examined the number of words frequently appearing in both Vocaloid songs and popular songs, and clarified the characteristics of the songs.

In the result, the number of words was higher in Vocaloid music than general music to express a strong message. After the research above, I surveyed the listeners' emotions to music, and it was found that listeners who are particularly interested in Vocaloid evoke various emotions with music. Furthermore, they tend to emphasis was placed on elements of ease of empathy in the music.