Question 1

Where is Atami Sun Beach?

Accepted Answer

Atami Sun Beach is in Atami, Shizuoka Prefecture, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Wash It All Away does Atami Sun Beach appear in?

Accepted Answer

Atami Sun Beach appears in OP of Wash It All Away.

Question 3

Can I visit Atami Sun Beach?

Accepted Answer

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

Question 4

Where was Wash It All Away filmed?

Accepted Answer

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