Question 1

Where is Sunshine Street?

Accepted Answer

Sunshine Street is in Toshima, Tokyo, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Durarara!! does Sunshine Street appear in?

Accepted Answer

Sunshine Street appears in OP of Durarara!!.

Question 3

Can I visit Sunshine Street?

Accepted Answer

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

Question 4

Where was Durarara!! filmed?

Accepted Answer

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