Question 1

Where is Daimon?

Accepted Answer

Daimon is in Maebashi, Gunma, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Maebashi Witches does Daimon appear in?

Accepted Answer

Daimon appears in OP of Maebashi Witches.

Question 3

Can I visit Daimon?

Accepted Answer

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

Question 4

Where was Maebashi Witches filmed?

Accepted Answer

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