Question 1

Where is Nikoniko Parking Ginza St.?

Accepted Answer

Nikoniko Parking Ginza St. 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 Nikoniko Parking Ginza St. appear in?

Accepted Answer

Nikoniko Parking Ginza St. appears in OP of Maebashi Witches.

Question 3

Can I visit Nikoniko Parking Ginza St.?

Accepted Answer

Yes. Nikoniko Parking Ginza St. 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 Nikoniko Parking Ginza St. is one of those real places (OP).