Question 1

Where is Tenkakudai?

Accepted Answer

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

Question 2

Which scene of Touring After the Apocalypse does Tenkakudai appear in?

Accepted Answer

Tenkakudai appears in EP1 of Touring After the Apocalypse.

Question 3

Can I visit Tenkakudai?

Accepted Answer

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

Question 4

Where was Touring After the Apocalypse filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Tenkakudai is one of those real places (EP1).