(I put this here since I have no idea if it's spoilery or not, and it might become so with later updates)
So far from what I've seen the game will take place on and/or around (that is the base of) Mount Hikami. There appears, from the screenshots on the official site, to be some sort of tourist village(?) at the base of the mountain with a angled train car that would take people up the mountain. That village seems to have modern convinces like sidewalks, phone booths and street lights. Maybe this is where Yuri and friend's have their shop and live at? It would be interesting and quite scary to see ghosts in this area I think. Possibly the shop is something of a "safe" zone like in 3, that will become less safe as time goes on?
The forest lies outside of the village or surrounds it, I'm guessing this is where you will find the older, dilapidated structures seen in the screenshots and where most of the spooky fun happens at. As you progress through the game you will work your way up part of the mountain to a shine to fight the final boss?
Since I doubt any sane human would walk in the rain up a mountain multiple times in the dead of night in rain, maybe the main gameplay will take place as an astral-projection or dream like in 3? Which might explain Yuri waking up in a pond of dead, ancient kimono ghost people.