Male aristocrats at the time had many mistresses, moving from one to another, a custom powerful samurai families followed in order to increase the population of the clan.
当時の貴族は複数の妻妾の家に通うのが一般的だが、有力武家も本妻の他に多くの妾を持ち子を産ませて一族を増やすのが当然だった。