According to "Kuninomiyatsuko hongi", Aheshiko no mikoto, a grandson of Oshikorimi no mikoto, was appointed Tsukuba no kuninomiyatsuko during the reign of Emperor Seimu.
『国造本紀』によると、成務天皇朝に忍凝見命の孫の阿閇色命が筑波国造に任じられたという。