Because Edo was placed at the center of politics, many products and cooking methods in areas throughout Japan were gathered there, in addition to the occasions of Sankinkotai (a system under which feudal lords in the Edo period were required to spend every other year in residence in Edo) of daimyo (Japanese feudal lords).
江戸は政治の中心地であり、諸大名の参勤交代をはじめ広く地方の産物や料理法が持ち込まれた。