Because she was born from a mother of low birth, Genji took her in and gave her high-level education to become an empress as an adopted daughter of his de facto legitimate wife, Murasaki no ue.
出自の低い母から生まれたため、源氏は娘を手元に引き取り、正妻格である紫の上の養女として、高い后教育を施す。