Question 1

Where is nankirou?

Accepted Answer

nankirou is in Kawagoe, Saitama Prefecture, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Botan Kamiina Fully Blossoms When Drunk does nankirou appear in?

Accepted Answer

nankirou appears in EP4 of Botan Kamiina Fully Blossoms When Drunk.

Question 3

Can I visit nankirou?

Accepted Answer

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

Question 4

Where was Botan Kamiina Fully Blossoms When Drunk filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and nankirou is one of those real places (EP4).