(some suppose that the heir to the Hojo clan was Masanori, who was born to Maki no kata, the second wife, and that Yoshitoki was originally the founder of the Ema clan, a branch of the Hojo clan).
（北条氏の嫡子は後妻である牧の方の子政範であり義時は本来は分家江間氏の始祖であったのではないかと見る説もある）。