However, because it was not easy to test scales within lords' territories, the Edo bakufu tried to protect hakari-za by granting officers of hakari-za the privilege to impress tenma (post horse).
しかし諸侯の領地では検定は容易に行なうことができないため、江戸幕府は秤座役人に伝馬徴発の特権を与えるなどその秤座の保護に努めた。