Satono Diamond (サトノダイヤモンド) was one of the standout Japanese colts of the mid-2010s, a bay son of Deep Impact foaled on 30 January 2013. Bred by Northern Farm, he raced in the colours of Satomi Horse Company Co. Ltd. and was trained throughout his career by Yasutoshi Ikee at Ritto. Before he ever reached the track, he had already attracted major attention, bringing ¥241.5 million at the 2013 Select Sale.
His pedigree combined elite Japanese and international blood. Satono Diamond was by Deep Impact, one of the most influential stallions in modern Japanese breeding, and out of Malpensa, a daughter of Orpen. He came from a family that also included Linate, Satono Genesis, and Marchesa, giving further depth to an already notable page. In profile, he looked every inch a top-class Northern Farm product, and his later record would justify that early reputation.
On the racecourse, Satono Diamond built a relatively compact but highly accomplished career. From 18 starts he won 8 races, with 1 second and 3 thirds, and he amassed more than ¥865 million in JRA earnings. His rise through the classic generation in 2016 was especially important: that season brought wins in the Kisaragi Sho, Kobe Shimbun Hai, and, most notably, the Kikuka Sho, the St Leger of Japan and one of the country's major Classic prizes for three-year-olds.
He crowned that same year with his biggest victory in the 2016 Arima Kinen, one of Japan's most prestigious all-aged races and a race of enormous public prestige. That performance, coming at the end of an exceptional three-year-old season, helped secure him the JRA Award for Best Three-Year-Old Colt of 2016. It marked him not just as a Classic winner, but as a colt able to defeat older horses at the highest level.
Satono Diamond remained in training beyond his championship season and added further major victories in the Hanshin Daishoten in 2017 and the Kyoto Daishoten in 2018. His career arc was not simply that of a brilliant spring-and-autumn three-year-old, but of a horse who continued to compete at the top level over several seasons. Retired as a stallion, he left the track as a Group 1 winner, a Japanese Classic hero, and a horse closely associated with the Deep Impact legacy in modern Japanese racing.
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