Question 1

Where is Nishiura Dam?

Accepted Answer

You can see the exact position of Nishiura Dam from the map coordinates and the Street View link.

Question 2

Which scene of Waiting in the Summer does Nishiura Dam appear in?

Accepted Answer

Nishiura Dam appears in EP1 of Waiting in the Summer.

Question 3

Can I visit Nishiura Dam?

Accepted Answer

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

Question 4

Where was Waiting in the Summer filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Nishiura Dam is one of those real places (EP1).