Question 1

Where is Oda house Nagayamon?

Accepted Answer

Oda house Nagayamon is in Akashi, Hyogo, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Fate/stay night: Heaven's Feel does Oda house Nagayamon appear in?

Accepted Answer

Oda house Nagayamon appears in EP1 of Fate/stay night: Heaven's Feel.

Question 3

Can I visit Oda house Nagayamon?

Accepted Answer

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

Question 4

Where was Fate/stay night: Heaven's Feel filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Oda house Nagayamon is one of those real places (EP1).