Question 1

Where is Akihabara UDX?

Accepted Answer

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

Question 2

Which scene of GATE does Akihabara UDX appear in?

Accepted Answer

Akihabara UDX appears in OP of GATE.

Question 3

Can I visit Akihabara UDX?

Accepted Answer

Yes. Akihabara UDX 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 Akihabara UDX is one of those real places (OP).