Since then, in case of death of emperors and Sessho Kanpaku (regent and chief adviser to the Emperor), Kogen took place as designated in "Jogan Gishiki" (ceremonies in the manner of the Jogan era) and "Saikyuki" (a record of court practices and usage, written by MINAMOTO no Takaaki in Chinese style).
以降は、『貞観儀式』や『西宮記』などの規定通り、天皇や摂政・関白の死去などに際して固関が行なわれた。