For rituals consisting of numerous annual events, detailed etiquette and patterns were determined, and such books concerned with rituals like "Saikyuki" and "Hokuzansho" were written in order to smoothly execute these rituals.
非常に多数の年中行事からなる儀式は、細部まで作法・様式が決められており、儀式を滞りなく執り行うため、『西宮記』『北山抄』などの儀式書も作られた。