Question 1

Where is Greenhouse, Shinjuku Gyoen National Garden?

Accepted Answer

Greenhouse, Shinjuku Gyoen National Garden 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 Horimiya: The Missing Pieces does Greenhouse, Shinjuku Gyoen National Garden appear in?

Accepted Answer

Greenhouse, Shinjuku Gyoen National Garden appears in OP of Horimiya: The Missing Pieces.

Question 3

Can I visit Greenhouse, Shinjuku Gyoen National Garden?

Accepted Answer

Yes. Greenhouse, Shinjuku Gyoen National Garden is a real place you can visit. Check what it looks like on Street View before you go.

Question 4

Where was Horimiya: The Missing Pieces filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Greenhouse, Shinjuku Gyoen National Garden is one of those real places (OP).