Question 1

Where is Tenten?

Accepted Answer

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

Question 2

Which scene of Uncle from Another World does Tenten appear in?

Accepted Answer

Tenten appears in EP6 of Uncle from Another World.

Question 3

Can I visit Tenten?

Accepted Answer

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

Question 4

Where was Uncle from Another World filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Tenten is one of those real places (EP6).