Question 1

Where is Nagatoro Bridge?

Accepted Answer

Nagatoro Bridge is in Kōfu, Yamanashi, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of mono does Nagatoro Bridge appear in?

Accepted Answer

Nagatoro Bridge appears in OP of mono.

Question 3

Can I visit Nagatoro Bridge?

Accepted Answer

Yes. Nagatoro Bridge 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 Nagatoro Bridge is one of those real places (OP).