He later became a successful sire in Japan .
Agnes Tachyon was undefeated in his four race starts , including Satsuki Sho ( Japanese 2000 Guineas ) , before a bowed tendon ended his racing career .
He later became a successful sire in Japanese .
Agnes Tachyon was undefeated in his four race starts , including Satsuki Sho ( Japanese 2000 Guineas ) , before a bowed tendon ended his racing career .