Question 1

Where is Kofu Castle Ruins?

Accepted Answer

Kofu Castle Ruins is in Kōfu, Yamanashi Prefecture, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of mono does Kofu Castle Ruins appear in?

Accepted Answer

Kofu Castle Ruins appears in EP2 of mono.

Question 3

Can I visit Kofu Castle Ruins?

Accepted Answer

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

Question 4

Where was mono filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Kofu Castle Ruins is one of those real places (EP2).