Question 1

Where is Dondonzaka?

Accepted Answer

Dondonzaka is in Nagasaki, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of The Colors Within does Dondonzaka appear in?

Accepted Answer

Dondonzaka is a real place that appears in The Colors Within.

Question 3

Can I visit Dondonzaka?

Accepted Answer

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

Question 4

Where was The Colors Within filmed?

Accepted Answer

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