Question 1

Where is National Diet Library?

Accepted Answer

National Diet Library 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 Oshi no Ko does National Diet Library appear in?

Accepted Answer

National Diet Library appears in EP7 of Oshi no Ko.

Question 3

Can I visit National Diet Library?

Accepted Answer

Yes. National Diet Library 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 filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and National Diet Library is one of those real places (EP7).