Daisuke Asakura
In 2000, at the age of 14, Kamiyama was part of D.A.N.K. (Daisuke Asakura New Kids), a performance troupe produced by Daisuke Asakura. In 2001, he appeared on the audition program "Study Park!!", where he was selected as one of the members for the boy band Run&amp;Gun, later debuting on July 4, 2001 with the single "Lay-Up!" During his time with the group, in 2005, Kamiyama also released a solo song titled "Byū Byū Kuru Yasashisa wa" for Run&amp;Gun's first extended play, "Hateshinai Tabi no Naka de..."