Question 1

Where is Mejiro-dai 1-chome Playground?

Accepted Answer

Mejiro-dai 1-chome Playground is in Bunkyō, Tokyo, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Blue Box does Mejiro-dai 1-chome Playground appear in?

Accepted Answer

Mejiro-dai 1-chome Playground appears in EP3 of Blue Box.

Question 3

Can I visit Mejiro-dai 1-chome Playground?

Accepted Answer

Yes. Mejiro-dai 1-chome Playground is a real place you can visit. Check what it looks like on Street View before you go.

Question 4

Where was Blue Box filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Mejiro-dai 1-chome Playground is one of those real places (EP3).