She had a younger brother named Prince Ōtsu, who was born three years later in Na no Ōtsu of Kyūshū. Her mother, Princess Ōta, died when Princess Ōku was seven years old.
Princess Ōku had a younger brother named Prince Ōtsu, who was born three years after her. Their mother, Princess Ōta, died when Princess Ōku was seven years old.