I never stopped to think about how Yasaka became Yamatagi Madara, a big oversight on my part.
He(?), at the point Dara-san and the trash sister had confronted him, was a pretty powerful youkai, so powerful he had turned into a semi mountain god, but such transformations don't happen without cause or time, and Yamatagi's own existence in that village was already something of at least one generation or two.
I didn't think about the psychic that helped the swindler trash... guy "sugested" passing the curse, and I was so angry at the trash that I forgot to consider he deserved reconing too.
Happy Yasaka is more thorough than I.
And Yasaka's name didn't come from just anywhere.
SNAKE GANG.