Question 1

Where is Kannonzaki Lighthouse?

Accepted Answer

Kannonzaki Lighthouse is in Yokosuka, Kanagawa, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Slow Loop does Kannonzaki Lighthouse appear in?

Accepted Answer

Kannonzaki Lighthouse appears in EP2 of Slow Loop.

Question 3

Can I visit Kannonzaki Lighthouse?

Accepted Answer

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

Question 4

Where was Slow Loop filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Kannonzaki Lighthouse is one of those real places (EP2).