Question 1

Where is Otori Chaya Den-Den?

Accepted Answer

Otori Chaya Den-Den is in Kuki, Saitama 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 Otori Chaya Den-Den appear in?

Accepted Answer

Otori Chaya Den-Den appears in OP of Lucky☆Star.

Question 3

Can I visit Otori Chaya Den-Den?

Accepted Answer

Yes. Otori Chaya Den-Den 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 Otori Chaya Den-Den is one of those real places (OP).