All about Tanaka Koki 田中聖 Born in Chiba in November 5, 1985, Tanaka Koki is a member of the Johnny's Entertainment group, KAT-TUN . He is the rapper for KAT-TUN and is known for his hiphop style. He writes most of the rap lyrics in KAT-TUN 's songs. Together with fellow KAT-TUN member Nakamaru Yuichi...