Question 1

Where is PREGO?

Accepted Answer

PREGO is in Kanazawa, Ishikawa, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Hanasaku Iroha does PREGO appear in?

Accepted Answer

PREGO appears in EP18 of Hanasaku Iroha.

Question 3

Can I visit PREGO?

Accepted Answer

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

Question 4

Where was Hanasaku Iroha filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and PREGO is one of those real places (EP18).