Aritsuna had escaped and gone into hiding in Uda-gun, Yamato Province, a place in which Yoshitsune's mother, Tokiwa Gozen had family connections, meanwhile twleve days after Tokiwa and Yoshitsune's younger sister (Aritsuna's wife) were captured in Kyoto by the Kamakura forces, Aitsuna's hideout was attacked, so it is thought that they had divulged his whereabouts, or someone in the vicinity had leaked his whereabouts.
逃亡した有綱が潜んでいたのは義経の母常盤御前に縁のある大和国宇陀郡であり、都で常盤と義経の妹（有綱の妻）が鎌倉方に捕らわれた12日後に有綱が潜伏先を襲撃されている事から、彼らもしくはその周辺から情報が漏れたものと思われる。