Koyasan

This app allows you to view visual guidance on your smartphone, working
in conjunction with the "Koyasan guidebook"(Koyasan support guide) to explain the various points of interest throughout Koyasan’s temples and accommodation.
In addition to the Air Tag feature that uses your camera screen to show the directions to Koyasan’s most famous spots, the app contains special introductory video clips.

*This app is not guaranteed to function normally on all devices.