Rulership, a Group 1 winner in Hong Kong this year, has been retired and will enter stud in 2013 at Shadai Stallion Station on the island of Hokkaido, Japan.
The 5-year-old King Kamehameha horse won eight of 20 career starts, earning $7,828,712.
He enjoyed his best season of racing in 2012, winning the Group 1 Queen Elizabeth II Cup in Hong Kong and the Group 2 American Jockey Club Cup in Japan, as well as recording four other Group 1 placings. Rulership won two Group 2 events in 2011.