Question 1

Where is sumu?

Accepted Answer

sumu is in Fukui, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Chitose Is in the Ramune Bottle does sumu appear in?

Accepted Answer

sumu appears in EP4 of Chitose Is in the Ramune Bottle.

Question 3

Can I visit sumu?

Accepted Answer

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

Question 4

Where was Chitose Is in the Ramune Bottle filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and sumu is one of those real places (EP4).