Raising his younger paternal half-sister (Kakusan-ni), who was born a year before his father died, as his adopted daughter, he gave her in marriage to Tokimune in 1261, whereby reinforcing his relationship with the Tokuso family of the Hojo clan.
父の死の前年に産まれた異母妹（覚山尼）を猶子として養育し、弘長元年（1261年）に時宗に嫁がせて北条得宗家との関係を強固なものとした。