Yoriai had been under the control of rusui (caretaker or keeper [official post in the Edo period]; rusui is under the control of rojyu [senior councilor of the Tokugawa shogunate]), but it became under the control of wakadoshiyori in June 1719, and in 1740, hatamoto with income of 3,000 koku or greater was appointed as yoriai.
享保4（1719年）年6月、留守居支配（留守居は老中支配）より若年寄支配の寄合となり、元文5（1740年）年、3,000石以上の旗本を全て寄合とした。