Question 1

Where is Ueda Castle Ruins Park?

Accepted Answer

Ueda Castle Ruins Park is in Ueda, Nagano Prefecture, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Summer Wars does Ueda Castle Ruins Park appear in?

Accepted Answer

Ueda Castle Ruins Park is a real place that appears in Summer Wars.

Question 3

Can I visit Ueda Castle Ruins Park?

Accepted Answer

Yes. Ueda Castle Ruins Park is a real place you can visit. Check what it looks like on Street View before you go.

Question 4

Where was Summer Wars filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Ueda Castle Ruins Park is one of those real places.