Koki Tanaka is a Japanese singer–songwriter, actor and former Japanese idol. He was a member of Jpop idol boy band KAT-TUN from their debut until September 30, 2013 when his contract with Johnny & Associates was terminated.
When he was a member of KAT-TUN, he was recognized as the rapper in the group and has a hip-hop-influenced style. Out of the other members, Tanaka was most often paired up with Yuichi Nakamaru and they even formed a comedy duo 'TaNaka'. After leaving Johnny & Associates, Tanaka formed a new rock band called INKT.
