Question 1

Where is Zekuu?

Accepted Answer

Zekuu is in Kamogawa, Chiba, 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 Zekuu appear in?

Accepted Answer

Zekuu appears in EP3 of Botan Kamiina Fully Blossoms When Drunk.

Question 3

Can I visit Zekuu?

Accepted Answer

Yes. Zekuu 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 Zekuu is one of those real places (EP3).