星野源 Gen Hoshino (星野 源, Hoshino Gen, born January 28, 1981) is a Japanese singer-songwriter, musician, actor, and writer. Since 2000, Hoshino has led the instrumental band Sakerock, where he plays marimba and guitar. They released over ten albums before disbanding in 2015. As a solo artist, he debuted with his first album Baka no Uta on June 23, 2010.