Question 1

Where is Tōkyō Mentsūdan?

Accepted Answer

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

Question 2

Which scene of The Devil is a Part-Timer! does Tōkyō Mentsūdan appear in?

Accepted Answer

Tōkyō Mentsūdan appears in EP13 of The Devil is a Part-Timer!.

Question 3

Can I visit Tōkyō Mentsūdan?

Accepted Answer

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

Question 4

Where was The Devil is a Part-Timer! filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Tōkyō Mentsūdan is one of those real places (EP13).