Question 1

Where is Mt.Peaks?

Accepted Answer

Mt.Peaks is in Musashino, Tokyo, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Occultic;Nine does Mt.Peaks appear in?

Accepted Answer

Mt.Peaks appears in EP8 of Occultic;Nine.

Question 3

Can I visit Mt.Peaks?

Accepted Answer

Yes. Mt.Peaks is a real place you can visit. Check what it looks like on Street View before you go.

Question 4

Where was Occultic;Nine filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Mt.Peaks is one of those real places (EP8).