Question 1

Where is Grand Mall Park?

Accepted Answer

Grand Mall Park is in Yokohama, Kanagawa, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Blue Box Season 2 does Grand Mall Park appear in?

Accepted Answer

Grand Mall Park appears in OP1 of Blue Box Season 2.

Question 3

Can I visit Grand Mall Park?

Accepted Answer

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

Question 4

Where was Blue Box Season 2 filmed?

Accepted Answer

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