Air Shakur, winner of the Satsuki-sho and the Kikka-sho in 2000, died Thursday evening due to complications from a broken leg, the Japan Racing Association said Friday.
The 6-year-old horse broke the left hind leg after kicking a paddock fence at the Breeders' Stallion Station in Monbetsu, Hokkaido, Thursday afternoon while grazing.
Air Shakur, offspring of former Kentucky Derby winner Sunday Silence, retired after placing ninth in the season-ending Arima Kinen last December.
Air Shakur had a 20-4 record, including the double Grade One victories in 2000 with star jockey Yutaka Take.