Miyohajime refers to a series of measures and the policies that are performed as part of the rule of the new reign of the new monarch at the beginning of his assumption after the death or retirement of the previous monarch.
御代始（みよはじめ）とは、前の君主の死去・隠居に伴う、新君主の就任初期に新治世の統治の一環として行われる一連の施策・政策を指す。