Question 1

Where is Gunma Prefecture Office?

Accepted Answer

Gunma Prefecture Office 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 Gunma Prefecture Office appear in?

Accepted Answer

Gunma Prefecture Office appears in OP of Maebashi Witches.

Question 3

Can I visit Gunma Prefecture Office?

Accepted Answer

Yes. Gunma Prefecture Office 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 Gunma Prefecture Office is one of those real places (OP).