Question 1

Where is Otani Museum?

Accepted Answer

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

Question 2

Which scene of Saekano: How to Raise a Boring Girlfriend .flat does Otani Museum appear in?

Accepted Answer

Otani Museum appears in EP3 of Saekano: How to Raise a Boring Girlfriend .flat.

Question 3

Can I visit Otani Museum?

Accepted Answer

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

Question 4

Where was Saekano: How to Raise a Boring Girlfriend .flat filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Otani Museum is one of those real places (EP3).