Question 1

Where is Maruimaru?

Accepted Answer

Maruimaru is in Yokosuka, Kanagawa, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Slow Loop does Maruimaru appear in?

Accepted Answer

Maruimaru appears in EP6 of Slow Loop.

Question 3

Can I visit Maruimaru?

Accepted Answer

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

Question 4

Where was Slow Loop filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Maruimaru is one of those real places (EP6).