Question 1

Where is Kanaguya?

Accepted Answer

Kanaguya is in Yamanouchi, Nagano, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Ruri Rocks does Kanaguya appear in?

Accepted Answer

Kanaguya appears in EP13 of Ruri Rocks.

Question 3

Can I visit Kanaguya?

Accepted Answer

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

Question 4

Where was Ruri Rocks filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Kanaguya is one of those real places (EP13).