When a retiree and his successor of the reigns of the family submit an application of inkyo based upon a declaration of an intention to retire, succession of the reigns of the family commences while the current head of the family is still living.
隠居者およびその家督相続人が、隠居の意思表示に基づく届出を行うことにより、戸主の生前に家督相続が開始する。