Based on the Ritsuryo law, the original purpose of the Ichoku was to apply the Charge of Ichoku to individuals who went against the procedures contained in an Imperial command, but in later years, the Ichoku changed to mean an act or behavior which signified resistance against an Imperial command or an Imperial envoy.
本来の律令法における趣旨は勅の手続に違う者に対して適用される罪であったが、後に勅の内容あるいは勅使に抵抗する行為を指すようになった。