In the Edo bakufu, the officers in this post watched for Wakatoshiyori (governmental officers in the bakufu) the states of Hatamoto (direct retainers of the bakufu) and Gokenin (also direct retainers of the bakufu, but lower-ranked than Hatamoto).
江戸幕府の若年寄の目耳になって旗本・御家人を監察した。