What's more, after Yoritomo established Administrative Borad as the second court rank, Major Captain of the Right Division of Inner Palace Guards, he was active as a chief officer to carry out negotiations with the imperial court and to handle other affairs as a practician.
更に頼朝が二品右大将となって政所を開設してからは、その別当として朝廷との交渉その他に実務家として活躍する。