Question 1

Where is Seson-in?

Accepted Answer

Seson-in is in Suginami, Tokyo, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Hirayasumi does Seson-in appear in?

Accepted Answer

Seson-in appears in PV1 of Hirayasumi.

Question 3

Can I visit Seson-in?

Accepted Answer

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

Question 4

Where was Hirayasumi filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Seson-in is one of those real places (PV1).