Question 1

Where is Takase?

Accepted Answer

Takase is in Toshima, Tokyo, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Blue Box does Takase appear in?

Accepted Answer

Takase appears in EP25 of Blue Box.

Question 3

Can I visit Takase?

Accepted Answer

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

Question 4

Where was Blue Box filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Takase is one of those real places (EP25).