Question 1

Where is Sannenzaka?

Accepted Answer

Sannenzaka is in Kyoto, Kyoto Prefecture, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Lucky☆Star does Sannenzaka appear in?

Accepted Answer

Sannenzaka appears in EP21 of Lucky☆Star.

Question 3

Can I visit Sannenzaka?

Accepted Answer

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

Question 4

Where was Lucky☆Star filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Sannenzaka is one of those real places (EP21).