Question 1

Where is Akai Park?

Accepted Answer

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

Question 2

Which scene of I Made Friends with the Second Prettiest Girl in My Class does Akai Park appear in?

Accepted Answer

Akai Park appears in EP10 of I Made Friends with the Second Prettiest Girl in My Class.

Question 3

Can I visit Akai Park?

Accepted Answer

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

Question 4

Where was I Made Friends with the Second Prettiest Girl in My Class filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Akai Park is one of those real places (EP10).