Kirk here with a little image comparing a still from Hotarubi no Mori e with a picture of the staircase leading to Kamishikimi Kumanoza Shrine (上色見熊野座神社). The still from the animated movie was taken from an official Japanese-language trailer that can be found here:
https://www.youtube.com/watch?v=qXLSRH31Yao&t=14s
Information in English about the movie is here:
https://en.wikipedia.org/wiki/Hotarubi_no_Mori_e
The picture of the actual shrine comes from the following post on Kumamoto Japan Tourism (a Facebook page):
The post on the Kumamoto Japan Tourism Facebook page has a link to a Google map showing the location.
There are lots of YouTube videos that show the approach to the shrine. Here’s on I think is particularly well done: