Question 1

Where is Harmonica Yokocho?

Accepted Answer

Harmonica Yokocho is in Yokohama, Kanagawa Prefecture, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Bungo Stray Dogs 3 does Harmonica Yokocho appear in?

Accepted Answer

Harmonica Yokocho appears in EP6 of Bungo Stray Dogs 3.

Question 3

Can I visit Harmonica Yokocho?

Accepted Answer

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

Question 4

Where was Bungo Stray Dogs 3 filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Harmonica Yokocho is one of those real places (EP6).