Takano no Niigasa was a concubine of Emperor Kōnin of Japan and the mother of Emperor Kanmu. Her full name was Takano no Asomi Niigasa. Wikipedia
Died: 790 AD
Children: Emperor Kanmu
Grandchildren: Emperor Saga, Emperor Heizei, Yoshimine no Yasuyo, and more
Partner: Emperor Kōnin