The "Other" World is accessable via doorway/portal, only opened and closed by the Guardian Gatekeeper at certain times, allowing the Human world and Other world to meet.
Those of the Human world may see the Other World as a dark, scary, and dangerous place (especially those who have never been there and hear information from secondary sources), The Other World actually features a bustling night market and joyous vibes, accepting of any and all who step into their little world.
A 9 tailed fox that looks over the shrine in The "Other" World and keeps the barrier up to protect the Yokai from Human presence.