Kōki Chūma (中馬 弘毅 Chūma Kōki, born October 8, 1936) is a Japanese politician serving in the House of Representatives in the Diet (national legislature) as a member of the Liberal Democratic Party. A native of Osaka, Osaka and graduate of the University of Tokyo he was elected for the first time in 1976 as a member of the now-defunct party New Liberal Club. His father is Kaoru Chūma, former mayor of Osaka.