Naoki Tanaka (田中 直紀, Tanaka Naoki; born 19 June 1940 as Naoki Suzuki) is a former Japanese politician of the Democratic Party of Japan, who served as a member of the House of Councillors in the Diet (national legislature), from Niigata Prefectural electorate. He is a native of Kanazawa, Ishikawa and a graduate of Keio University.
When he married Makiko Tanaka he changed his family name to hers. In 1983, he entered the House of Representatives as a Liberal Democratic Party candidate, beginning his political career. He later served three terms in the House of Councillors.