Group 1-winning Australian mares Mystic Journey and Youngstar have both produced colts to Japanese champion Equinox this season.

The Japanese Stud Book is usually updated at the end of the local breeding season, and it shows that Mystic Journey, the Tasmanian-trained filly who won an Australian Guineas and the All-Star Mile, foaled a colt to the two-time Japanese Horse of The Year on February 2.

Youngstar, who first foal is a colt by Kizuna named Eri King who won a Group 3 and was fifth in this year’s Japanese Derby, foaled an Equinox colt on February 12.

Yankee Rose, the dual Australian Group 1 winner and dam of champion mare, the ill-fated Liberty Island, foaled a filly by Equinox on February 15.

Meanwhile, Yankee Rose’s yearling colt by Saturnalia is being offered for sale at next month’s JRHA Select Sale, which will also feature 25 first-crop foals by Equinox.

Funstar’s foal colt by Suave Richard will also be offered at that sale as will Golden Slipper winner Fireburn’s first foal by Kizuna.