Question 1

Where is Zenshoji?

Accepted Answer

Zenshoji is in Chiba, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Dagashi Kashi does Zenshoji appear in?

Accepted Answer

Zenshoji appears in OP1 of Dagashi Kashi.

Question 3

Can I visit Zenshoji?

Accepted Answer

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

Question 4

Where was Dagashi Kashi filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Zenshoji is one of those real places (OP1).