Prix de l'Arc de Triomphe winner Solemia has been retired following her failure in the Japan Cup won by local filly Gentildonna.
Solemia finished 13th of the 17 runners and trainer Carlos Laffon-Parias announced her retirement immediately after Sunday's race.
"I think she did very well in regard to that she is coming off of a hard race in the Arc and her first overseas travel," Laffon-Parias said.
"It might have been different if she had had experience racing abroad and had more time to adapt to the fast track here.
"She will retire now."
Solemia beat Japan's Horse of the Year Orfevre in the Arc and he again had to settle for second in the Japan Cup.
The winner's trainer Sei Ishizaka said Gentildonna would be given a break and embark on an international campaign next year which could include the Arc.
"Although the Japan Cup was a big challenge for a three-year-old filly, I was confident that she was up to the competition," he said.
"After her battle against tough competition in the Japan Cup, she will be turned out until her four-year-old season in which, depending on her condition, I will go on with my plan for overseas challenges, perhaps in Dubai, France or the USA."