The 68th NHK Kōhaku Uta Gassen (第68回NHK紅白歌合戦) was the 68th edition of annual NHK's Kōhaku Uta Gassen, held on December 31, 2017, live from NHK Hall. It was broadcast in Japan through NHK General Television (TV) and NHK Radio 1 (Radio), and worldwide through NHK World Premium and TV Japan. This year, the conductor of the festival's closing theme "Hotaru no Hikari" will be replaced by Shunichi Tokura, due to the death of Masaaki Hirao on July 21, 2017.

NHK Kōhaku Uta Gassen , more commonly known simply as Kōhaku, is an annual New Year's Eve television special produced by Japanese public broadcaster NHK. It is broadcast live simultaneously on television and radio, nationally and internationally by the NHK network and by some overseas broadcasters who buy the program. The show ends shortly before midnight. Before the show began broadcasting on television in late 1953, the show was held on 3 January and only consisted of a radio broadcast.