Ushba Tesoro became the first Japanese thoroughbred to win the prestigious international race since Sunday Silence descendant Victoire Pisa in 2011.
As the IndyCar season winds down, Sato is 19th in the 36-driver standings entering August, including three top-10 finishes.
“As the level of Japanese racehorses has increased over the years, I’ve been really proud to showcase it on the global stage,” trainer Yoshito Yahagi said.