Question 1

Where is Grassland Square(Base camp site)?

Accepted Answer

Grassland Square(Base camp site) is in Koto, Tokyo, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Weathering With You does Grassland Square(Base camp site) appear in?

Accepted Answer

Grassland Square(Base camp site) is a real place that appears in Weathering With You.

Question 3

Can I visit Grassland Square(Base camp site)?

Accepted Answer

Yes. Grassland Square(Base camp site) is a real place you can visit. Check what it looks like on Street View before you go.

Question 4

Where was Weathering With You filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Grassland Square(Base camp site) is one of those real places.