Gold Ship
After a nine-month absence, Kizuna returned in the Grade 2 Kyoto Kinen on 15 February 2015 and finished third, beaten a nose and a neck by Lovely Day and Suzuka Devious with Harp Star in fifth. In April he started odds-on favourite for the Sankei Osaka Hai but was beaten into second place by the five-year-old mare Lachesis. On 3 May Kizuna was made the 2.3/1 favourite for the Tennō Shō but finished seventh of the seventeen runners behind Gold Ship. He was retired from racing after sustaining a training injury in September 2015.