Question 1

Where is Edo Castle Ruins?

Accepted Answer

Edo Castle Ruins 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 Sword Art Online II does Edo Castle Ruins appear in?

Accepted Answer

Edo Castle Ruins appears in EP1 of Sword Art Online II.

Question 3

Can I visit Edo Castle Ruins?

Accepted Answer

Yes. Edo Castle Ruins is a real place you can visit. Check what it looks like on Street View before you go.

Question 4

Where was Sword Art Online II filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Edo Castle Ruins is one of those real places (EP1).