Question 1

Where is Izumien?

Accepted Answer

Izumien is in Uji, Kyoto Prefecture, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Sound! Euphonium: Our Promise: A Brand New Day does Izumien appear in?

Accepted Answer

Izumien is a real place that appears in Sound! Euphonium: Our Promise: A Brand New Day.

Question 3

Can I visit Izumien?

Accepted Answer

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

Question 4

Where was Sound! Euphonium: Our Promise: A Brand New Day filmed?

Accepted Answer

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