I once visited Ama-no-iwato Shrine in Miyazaki prefecture on my way to Kurokawa Onsen. The shrine consists of two separate shrines. Ama-no-iwato itself is enshrined in the West Shrine, and Amaterasu, the sun kami is enshrined in the East Shrine. The Iwato river separates the two shrines.
I visited the West Shrine. I went to the shrine office and asked to be shown to Ama-no-iwato, as it is hidden behind the hall of worship. A Shinto priest let us in after purifying us first. We were asked not to photograph the iwato, as it is sacred territory. The iwato has collapsed now, but what looked like its remains were visible.
There’s a large cavern with a shrine inside a short walk from the Ama-no-iwato. The riverbed there is the Ama-no-yasu-gawara. All the kami gathered here to discuss how to get Amaterasu out of Ama-no-iwato so light returns to the world.
Over the years, visiting pilgrims have piled stones on the way to the cavern.
There’re numerous spots related to Japanese myths in Takachiho. Manai Falls in Takachiho Gorge is one of them:
According to myths, a kami brought some water from the skies when he descended to the human world as there was no water where he descended. Ame-no-manai is known as the place where spring water then gushed out, flowing to Manai Falls.
Here’re photos of the gorge itself: