Question 1

Where is Marumo?

Accepted Answer

Marumo is in Toshima, Tokyo, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of BanG Dream! It's MyGO!!!!! does Marumo appear in?

Accepted Answer

Marumo appears in ED1 of BanG Dream! It's MyGO!!!!!.

Question 3

Can I visit Marumo?

Accepted Answer

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

Question 4

Where was BanG Dream! It's MyGO!!!!! filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Marumo is one of those real places (ED1).