Question 1

Where is Le Grand Kyu Karuizawa?

Accepted Answer

You can see the exact position of Le Grand Kyu Karuizawa from the map coordinates and the Street View link.

Question 2

Which scene of Waiting in the Summer does Le Grand Kyu Karuizawa appear in?

Accepted Answer

Le Grand Kyu Karuizawa appears in EP3 of Waiting in the Summer.

Question 3

Can I visit Le Grand Kyu Karuizawa?

Accepted Answer

Yes. Le Grand Kyu Karuizawa 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 Le Grand Kyu Karuizawa is one of those real places (EP3).