A Shin Hikari is a Japanese Thoroughbred racehorse. He began his racing career as a three-year-old in 2014 when he won his first five races including the Listed Ireland Trophy. In the following year he won the Mijakooji Stakes, Epsom Cup and Mainichi Okan in Japan before establishing himself as one of the best racehorses in the world with a victory in the Hong Kong Cup. In the spring of 2016 he was sent to Europe and began his campaign with a ten length win in the Prix d'Ispahan.

The Mainichi Ōkan is a Grade 2 horse race in for Thoroughbred colts and fillies aged three and over run over a distance of 1,800 metres at Tokyo Racecourse.