DECO*27

Kōsuke Terayama (Japanese: 寺山幸助, Hepburn: Terayama Kōsuke), known professionally as Deco*27 (stylized in all caps and pronounced Dekoniina), is a Japanese musician, Vocaloid producer, and songwriter. He is considered to be one of the most influential Vocaloid producers of the early 2010s, along with Wowaka and Kenshi Yonezu (Hachi).