In the Azuchi-Momoyama period, Nobunaga ODA and Hideyoshi TOYOTOMI built their bases here and carried out economic reforms, and in addition, a concentration of population and economic development were seen by conducting a large-scale engineering works for the shogun (tetsudai bushin) and by forming castle towns.
安土桃山時代に入ると織田信長や豊臣秀吉が当地に拠点を築いて経済改革を行い、また、大規模な手伝普請と城下町形成を行うことで人口の集住と経済発展が見られた。