While spending such days, Ona-a became a priestess and announced her name as 'Soshinni' in 1643 with a recommendation of Iemitsu as one of the reasons.
このような日々を送るうち、おなあは家光の勧めもあって、寛永20年（1643年）に出家し「祖心尼（そしんに）」と名乗った。