Question 1

Where is Tenka Chaya?

Accepted Answer

Tenka Chaya is in Fujikawaguchiko, Yamanashi, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of mono does Tenka Chaya appear in?

Accepted Answer

Tenka Chaya appears in OP of mono.

Question 3

Can I visit Tenka Chaya?

Accepted Answer

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

Question 4

Where was mono filmed?

Accepted Answer

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