The VRC Oaks winner Kirramosa has been retired from racing after being sold to overseas breeding interests.

Confirming the sale, trainer and part-owner John Sargent said the five-year-old had been bought by a leading Japanese stud.

"It was a good offer and we thought it was time to move her on," Sargent said.

"She was just getting ready to come back into the stable when they came up with the offer.

"She only really had until the end of the season before going off to stud so we thought it was best to take the offer."

Kirramosa, a daughter of New Zealand sire Alamosa, defeated Zanbagh and Solicit in a driving finish to the 2013 VRC Oaks when ridden by Nash Rawiller.

It represented Sargent's first Group One win since setting up permanent stables at Randwick after leaving New Zealand as the country's leading trainer in 2012.

Kirramosa didn't win another race after her Flemington triumph, but Sargent said injury stopped her from reaching her full potential as an older racehorse.

"She has been a good mare. A lot of things didn't work out for her injury-wise and whatever but I'm sure she will do a good time at stud," Sargent said.

Kirramosa returned to racing after almost 12 months off the scene for a spring carnival campaign that had its brightest moment with a minor placing in the Bendigo Cup.

She bows out after finishing down the course behind Who Shot Thebarman in last month's Zipping Classic at Sandown.

Despite Kirramosa's retirement, Sargent is well placed to make an impact during The Championships with luckless Melbourne Cup runner Gust Of Wind being set for the $2 million Sydney Cup.

But of more immediate interest to the stable will be the performance of Centre Pivot in the Bernborough Handicap at Doomben on Saturday as the five-year-old heads towards the Magic Millions race day.