Question 1

Where is Nishihama Beach?

Accepted Answer

Nishihama Beach is in Yuza, Yamagata, 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 Nishihama Beach appear in?

Accepted Answer

Nishihama Beach appears in ED4 of Botan Kamiina Fully Blossoms When Drunk.

Question 3

Can I visit Nishihama Beach?

Accepted Answer

Yes. Nishihama Beach 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 Nishihama Beach is one of those real places (ED4).