Question 1

Where is Yanagi tunnel?

Accepted Answer

Yanagi tunnel is in Tonosho, Kagawa, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Teasing Master Takagi-san does Yanagi tunnel appear in?

Accepted Answer

Yanagi tunnel is a real place that appears in Teasing Master Takagi-san.

Question 3

Can I visit Yanagi tunnel?

Accepted Answer

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

Question 4

Where was Teasing Master Takagi-san filmed?

Accepted Answer

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