Sakai Yuu was born September 20, 1979 in Kochi Prefecture, Japan. He is a singer-songwriter currently affiliated with Office Augusta. He releases his albums under the Ariola Japan label since 2009 and previous to that under Edoya Record (江戸屋レコード).
Sakai started growing interest in music late and began self-study at the age of 20. In 2001 he visited America, Los Angeles, where he performed in the streets of Downtown and deepened his understanding of various music styles of SOUL, R&B, JAZZ and HIPHOP with fellow local artists. He was also influenced by Gospel through the local church. Around that time he began composing music. Later he returned home to Japan in 2002, where he started a career as singer-songwriter and keyboardist. He was a guest player and guest vocalist for artists like PUSHIM, grooveline,村上ポンタ. JAM NUTS. マボロシ and Soma during that time and did also perform as DJ in various events.
In 2006 Sakai debuted with his own mini-album ZAMANNA. He is also a great fan of Stevie Wonder and was influenced by the latter in his own music.