Yuu-yu (ゆうゆ) is a Nico Nico Douga VOCALOID producer. He got attention through the video sharing network with the songs "Sakura no Kisetsu", "Shiro no Kisetsu" and "Clover Club". In 2010, he made his major debut into the music scene with the album Shikisai no Hoshi, featuring the voices of virtual idols Hatsune Miku, Kagamine Rin and Len.
- Stage Name: Yuu-yu (ゆうゆ)
- Birthday: January 1