Also there is another theory, that Yoritomo purposely did not capture Yoshitsune, delaying the tracking of his hiding place to diminish the temple and shrine powers, which sheltered Yoshitsune.
なお、頼朝は義経を庇護する寺社勢力の力を削ぐ為、あえて捕縛せずに潜伏地を遅れて追跡したのだ、とする説もある。