Question 1

Where is Near the Gas Science Museum ?

Accepted Answer

Near the Gas Science Museum  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 Oshi no Ko Season 2 does Near the Gas Science Museum  appear in?

Accepted Answer

Near the Gas Science Museum  appears in OP of Oshi no Ko Season 2.

Question 3

Can I visit Near the Gas Science Museum ?

Accepted Answer

Yes. Near the Gas Science Museum  is a real place you can visit. Check what it looks like on Street View before you go.

Question 4

Where was Oshi no Ko Season 2 filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Near the Gas Science Museum  is one of those real places (OP).