In July and August 1604, when the position of a wet nurse for Ieyasu's legitimate grandchild, Takechiyo (later called Iemitsu TOKUGAWA) was invited by the Kyoto deputy Katsushige ITAKURA, his wife Fuku applied for the position and was employed, after which Masanari divorced Fuku.
慶長9年（1604年）7月、家康の嫡孫・竹千代（後の徳川家光）の乳母が京都所司代板倉勝重によって募集された折に妻の福が志願して採用されると、福と離縁した。