Question 1

Where is Kamaiso Beach?

Accepted Answer

Kamaiso 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 Kamaiso Beach appear in?

Accepted Answer

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

Question 3

Can I visit Kamaiso Beach?

Accepted Answer

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