Question 1

Where is Admiral No. 7?

Accepted Answer

Admiral No. 7 is in Matsudo, Chiba, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Blue Orchestra does Admiral No. 7 appear in?

Accepted Answer

Admiral No. 7 appears in EP2 of Blue Orchestra.

Question 3

Can I visit Admiral No. 7?

Accepted Answer

Yes. Admiral No. 7 is a real place you can visit. Check what it looks like on Street View before you go.

Question 4

Where was Blue Orchestra filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Admiral No. 7 is one of those real places (EP2).