Burghclere in turn was a three-quarters sister to top filly Height of Fashion, sold by the Queen to Hamdan bin Rashid Al Maktoum, and subsequently the dam of Epsom Derby winner Nashwan, leading sire Unfuwain and multiple Group One winner Nayef.

After winning the Satsuki Sho, he went on to win the Tōkyō Yūshun(Japanese Derby) in a race record time of (2:23.3), tying King Kamehameha's record from a year earlier and becoming the sixth undefeated double champion in history and the first since Mihono Bourbon in 1992.

Finally, he won the Kikuka Sho on October 23rd, 2005, becoming the first horse since Narita Brian 11 years earlier to complete the Japanese Triple Crown of Thoroughbred Racing.

Two weeks later, news from France Galop revealed Deep Impact was positive tested to Ipratropium.

[6] Connections announced the colt would retire to stud after that season in a syndication deal worth 5.1 billion yen.

His last crop of runners include Auguste Rodin, who is having great success in Europe and North America.

The newspaper Jourd'e Gallo reported her death with the headline "Sayonara, Deep Impact," saying she was "a special presence in Japan that transcended the boundaries of a racehorse".