After the Ashidakanosei law was enacted in the Kyoho reforms, this post was the highest one that could be reached by lower-class officers of the bakufu, and it was rare that such an officer was promoted above this post.
享保の改革で足高の制ができて以降、下級幕吏が到達できるほぼ最高のポストとなり、これ以上の昇格は非常にまれとなる。