The Daijōsai is one of the most important Shinto rituals. It is performed once each imperial reign, by the Tennō in person, to honour Amaterasu Ōmikami and all the other kami. The current Tennō will perform it in a week’s time, and I have just released a paid essay on my Patreon describing how the ritual is performed. If you are interested in seeing it, the Patreon Back Numbers page contains details on what to do: you should sign up to my Patreon, pledge $2, and ask me for it as your additional essay at the beginning of next month.
The next essay is about the meaning of the Daijōsai, so it makes a good pair with this one.