Question 1

Where is Sumida Aquarium?

Accepted Answer

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

Question 2

Which scene of Lycoris Recoil does Sumida Aquarium appear in?

Accepted Answer

Sumida Aquarium appears in EP4 of Lycoris Recoil.

Question 3

Can I visit Sumida Aquarium?

Accepted Answer

Yes. Sumida Aquarium is a real place you can visit. Check what it looks like on Street View before you go.

Question 4

Where was Lycoris Recoil filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Sumida Aquarium is one of those real places (EP4).