There are lots of mysterious hidden shrines on Narukami Island. If you want to find these hidden areas on the Genshin Impact Inazuma map, you need to complete the ‘Sacred Sakura Cleansing Ritual’ quest. Doing so will unlock the Teleport Waypoint in Araumi (visible on the normal map, but unreachable) and grant you access to the Perpetual Mechanical Array boss.
The first step towards completing the Sacred Sakura Cleansing Ritual is accepting a side quest from an NPC called Kazari. You can find her directly after leaving Ritou for the first time. If you cross the water towards the larger Narukami Island, you’ll see Kazari right in front of you, on top of the stairs. Interact with Kazari to start the quest ‘A Strange Story in Konda’.
Be warned: speaking to this mysterious lady is just the first step of the Sacred Sakura Cleansing Ritual quest chain. The full questline is quite difficult and very (and we mean very!) long, but fortunately, we’re here to help you every step of the way.