Question 1

Where is Hojo Beach?

Accepted Answer

Hojo Beach is in Tateyama, Chiba, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Blue Box does Hojo Beach appear in?

Accepted Answer

Hojo Beach appears in EP15 of Blue Box.

Question 3

Can I visit Hojo Beach?

Accepted Answer

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

Question 4

Where was Blue Box filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Hojo Beach is one of those real places (EP15).