Seiun Jack
(Japan)About
Seiun Jack is a six-year-old mare from Japan, trained by Hiroyuki Yamaguchi. She is the offspring of stallion Black Tide and dam Nishino Nurse Call. Seiun Jack has one career win. Her most notable victory came on April 28, 2023, at Sonoda. Ridden by Takanori Nagai, she won a race worth $670,319, beating out Kayako.