Question 1

Where is Tokyo Big Sight Entrance Plaza?

Accepted Answer

Tokyo Big Sight Entrance Plaza 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 GATE does Tokyo Big Sight Entrance Plaza appear in?

Accepted Answer

Tokyo Big Sight Entrance Plaza appears in EP24 of GATE.

Question 3

Can I visit Tokyo Big Sight Entrance Plaza?

Accepted Answer

Yes. Tokyo Big Sight Entrance Plaza is a real place you can visit. Check what it looks like on Street View before you go.

Question 4

Where was GATE filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Tokyo Big Sight Entrance Plaza is one of those real places (EP24).