Question 1

Where is Keitokuji?

Accepted Answer

Keitokuji is in Yokosuka, Kanagawa, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Mirai does Keitokuji appear in?

Accepted Answer

Keitokuji is a real place that appears in Mirai.

Question 3

Can I visit Keitokuji?

Accepted Answer

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

Question 4

Where was Mirai filmed?

Accepted Answer

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