Question 1

Where is Sekaido Shinjuku?

Accepted Answer

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

Question 2

Which scene of Blue Period does Sekaido Shinjuku appear in?

Accepted Answer

Sekaido Shinjuku appears in EP9 of Blue Period.

Question 3

Can I visit Sekaido Shinjuku?

Accepted Answer

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

Question 4

Where was Blue Period filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Sekaido Shinjuku is one of those real places (EP9).