Mita-cho, where Sanda Domain established its jinya, flourished as the center of commerce because it was close to the border between Settsu Province and Harima Province (where many territories of the shogunate, small domains, detached areas of domains in Kanto region, and hatamoto were located).
三田藩が陣屋を置いた三田町は、周辺の摂津・播磨内陸部の国境地帯が幕府領、小藩領、関東諸藩の飛地領、旗本領等の錯綜地であったこともあり、商業の一大中心地として栄えた。