Question 1

Where is Hira Shrine?

Accepted Answer

Hira Shrine is in Chichibu, Saitama, 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 Hira Shrine appear in?

Accepted Answer

Hira Shrine appears in ED9 of Botan Kamiina Fully Blossoms When Drunk.

Question 3

Can I visit Hira Shrine?

Accepted Answer

Yes. Hira Shrine 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 Hira Shrine is one of those real places (ED9).