Hydaelyn Role-Players

I know some people have likened it to the Shinto religion I also know that the geomancers deal with spirits, but I'm curious if there is any underlying religion that most of Doma follow or more selectively, the Raen Au'ra follow? 

I regret to say I know VERY little about the religions in Asia to attempt comparison in the game for a character. So if there's anyone who is willing to drop me some tidbits of knowledge or an area for me to start researching in I would greatly appreciate it.

UI recently found a nice snippet of information to dabble in, if you'd still like to leave info here I wouldn't mind (I couldn't figure out how to delete this instead)