After Kasuga no tsubone's death, she was ordered by Iemitsu to control internal affairs in ooku 'same as Kasuga' and she became the ruler of ooku as the successor of Kasuga no tsubone.
春日局の死後は家光より「春日同様」に奥向きを取り締まることを命じられ、春日局の後任として大奥の支配者となった。