Question 1

Where is Seryojaya?

Accepted Answer

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

Question 2

Which scene of Deaimon does Seryojaya appear in?

Accepted Answer

Seryojaya appears in EP3 of Deaimon.

Question 3

Can I visit Seryojaya?

Accepted Answer

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

Question 4

Where was Deaimon filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Seryojaya is one of those real places (EP3).