The same year, he took Tsuruhime (Fukujoin) (daughter of Yasumasa SAKAKIBARA) as his lawful wife, who was an adopted daughter of Hidetada TOKUGAWA, to reinforce the relations with bakufu (Japanese feudal government headed by a shogun).
同年、徳川秀忠の養女・鶴姫(福照院)（榊原康政の娘）を正室に迎えて幕府との関係を深めた。