Question 1

Where is Asukayama Post Office?

Accepted Answer

Asukayama Post Office is in Kita, Tokyo, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of BanG Dream! does Asukayama Post Office appear in?

Accepted Answer

Asukayama Post Office appears in OP1 of BanG Dream!.

Question 3

Can I visit Asukayama Post Office?

Accepted Answer

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

Question 4

Where was BanG Dream! filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Asukayama Post Office is one of those real places (OP1).