The three-year-old won the Japanese Derby in Tokyo on his latest start in May and had been 20-1 with Coral for the 12-furlong feature.
Japanese runners have done well in the race in the past with Heart’s Cry finishing a close-up third behind Hurricane Run back in 2006.
“Deep Brillante will be flying the flag not only for Japan, but for the Classic generation as well, and although Yoshito Yahagi’s charge has attracted some support today, he will face a strong group of older horses on Saturday,” said Coral’s David Stevens.
The firm have last year’s winner Nathaniel as one of three 11-4 co-favourites after he won the Eclipse on his reappearance for John Gosden.
The Michael Stoute-trained Sea Moon and Aidan O’Brien’s St Nicholas Abbey share the position at the head of the market, although the latter was a minor drifter on Betfair on Wednesday afternoon, touching 10-1 to small money before trading at 4-1 at around 2pm.
“We cannot spilt the three market principals and at this stage are happy to let punters decide which one should be favourite,” added Stevens.
William Hill eased St Nicholas Abbey to 5-2 from 9-2.
King George, Coral bet: 11-4 Nathaniel, Sea Moon, St Nicholas Abbey, 6-1 Dunaden, 10-1 Danedream, 16-1 Bar