Question 1

Where is Murai Shoes?

Accepted Answer

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

Question 2

Which scene of Blue Box does Murai Shoes appear in?

Accepted Answer

Murai Shoes appears in OP1 of Blue Box.

Question 3

Can I visit Murai Shoes?

Accepted Answer

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

Question 4

Where was Blue Box filmed?

Accepted Answer

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