Order of the Spirit Keepers
Each Spirit Keeper belongs to an overarching organization called the Order of Spirit Keepers. Their purpose is to help revive Yokai or if that's not possible, to transition them to their new home plane after their time in the mortal realm. Many of the yokai they serve have been around since the world began. If the Keepers usher a spirit on, they do their best to record anything the yokai wishes the world to remember about them or their experiences.
The Keepers have gathered a vast amount of knowledge from the yokai that leave this plane. The library of all the notes and recordings is available to the public and in person only, if you know how to contact them. They choose to keep a low profile and do not interact with technology like the internet except for archival purposes.
Religious, Holy Order