Under the sankin-kotai system established in 1635, daimyo, in addition to residing in Edo and their own feudal domains each for one year, leaving their own families in Edo permanently as hostages, had to pay their own travel costs and living costs in Edo.
寛永12年（1635年）の参勤交代制度のもとでは、諸大名は1年毎に江戸と自領を行き来し、妻子は人質として江戸に常住しなければならないと同時に、その旅費や江戸の滞在費を全て大名に負担させていた。