Question 1

Where is Coffee Biwako?

Accepted Answer

Coffee Biwako is in Ota, Tokyo, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Fate/stay night: Heaven's Feel does Coffee Biwako appear in?

Accepted Answer

Coffee Biwako appears in EP1 of Fate/stay night: Heaven's Feel.

Question 3

Can I visit Coffee Biwako?

Accepted Answer

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

Question 4

Where was Fate/stay night: Heaven's Feel filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Coffee Biwako is one of those real places (EP1).